feat: replace n8n_create_data_table with n8n_manage_datatable (10 actions)

Replaces the single-purpose n8n_create_data_table tool with a comprehensive
n8n_manage_datatable tool covering all 10 n8n data table API endpoints:

Table operations: createTable, listTables, getTable, updateTable, deleteTable
Row operations: getRows, insertRows, updateRows, upsertRows, deleteRows

- Filter system with and/or logic and 8 condition operators
- Dry-run support for updateRows, upsertRows, deleteRows
- Pagination, sorting, and full-text search for row listing
- 9 new N8nApiClient methods for all data table endpoints
- Shared error handler and consolidated Zod schemas
- Comprehensive tool documentation with examples per action
- 36 handler tests + 18 API client tests

BREAKING: n8n_create_data_table removed. Use n8n_manage_datatable with
action="createTable" instead.

Based on work by @djakielski in PR #646.
Co-Authored-By: Dominik Jakielski <dominik.jakielski@urlaubsguru.de>

Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -7,6 +7,42 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [2.40.0] - 2026-03-21
+
+### Changed
+
+- **`n8n_manage_datatable` MCP tool** (replaces `n8n_create_data_table`): Full data table management covering all 10 n8n data table API endpoints
+  - **Table operations**: createTable, listTables, getTable, updateTable, deleteTable
+  - **Row operations**: getRows, insertRows, updateRows, upsertRows, deleteRows
+  - Filter system with and/or logic and 8 condition operators (eq, neq, like, ilike, gt, gte, lt, lte)
+  - Dry-run support for updateRows, upsertRows, deleteRows
+  - Pagination, sorting, and full-text search for row listing
+  - Shared error handler and consolidated Zod schemas for consistency
+  - 9 new `N8nApiClient` methods for all data table endpoints
+- **`projectId` parameter for `n8n_create_workflow`**: Create workflows directly in a specific team project (enterprise feature)
+
+### Breaking
+
+- `n8n_create_data_table` tool replaced by `n8n_manage_datatable` with `action: "createTable"`
+
+Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en
+
+## [2.38.0] - 2026-03-20
+
+### Added
+
+- **`transferWorkflow` diff operation** (Issue #644): Move workflows between projects via `n8n_update_partial_workflow`
+  - New `transferWorkflow` operation type with `destinationProjectId` parameter
+  - Calls `PUT /workflows/{id}/transfer` via dedicated API after workflow update
+  - Proper error handling: returns `{ success: false, saved: true }` when transfer fails after update
+  - Transfer executes before activation so workflow is in target project first
+  - Zod schema validates `destinationProjectId` is non-empty
+  - Updated tool description and documentation to list the new operation
+  - `inferIntentFromOperations` returns descriptive intent for transfer operations
+  - `N8nApiClient.transferWorkflow()` method added
+
+Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en
+
 ## [2.37.4] - 2026-03-18
 
 ### Changed

dist/mcp/handlers-workflow-diff.d.ts.map

@@ -1 +1 @@
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+{"version":3,"file":"handlers-workflow-diff.d.ts","sourceRoot":"","sources":["../../src/mcp/handlers-workflow-diff.ts"],"names":[],"mappings":"AAMA,OAAO,EAAE,eAAe,EAAE,MAAM,kBAAkB,CAAC;AAMnD,OAAO,EAAE,eAAe,EAAE,MAAM,2BAA2B,CAAC;AAE5D,OAAO,EAAE,cAAc,EAAE,MAAM,6BAA6B,CAAC;AAkF7D,wBAAsB,2BAA2B,CAC/C,IAAI,EAAE,OAAO,EACb,UAAU,EAAE,cAAc,EAC1B,OAAO,CAAC,EAAE,eAAe,GACxB,OAAO,CAAC,eAAe,CAAC,CAib1B"}

dist/mcp/handlers-workflow-diff.js

@@ -79,6 +79,7 @@ const workflowDiffSchema = zod_1.z.object({
         settings: zod_1.z.any().optional(),
         name: zod_1.z.string().optional(),
         tag: zod_1.z.string().optional(),
+        destinationProjectId: zod_1.z.string().min(1).optional(),
         id: zod_1.z.string().optional(),
     }).transform((op) => {
         if (NODE_TARGETING_OPERATIONS.has(op.type)) {
@@ -329,6 +330,25 @@ async function handleUpdatePartialWorkflow(args, repository, context) {
                     logger_1.logger.warn('Tag operations failed (non-blocking)', tagError);
                 }
             }
+            let transferMessage = '';
+            if (diffResult.transferToProjectId) {
+                try {
+                    await client.transferWorkflow(input.id, diffResult.transferToProjectId);
+                    transferMessage = ` Workflow transferred to project ${diffResult.transferToProjectId}.`;
+                }
+                catch (transferError) {
+                    logger_1.logger.error('Failed to transfer workflow to project', transferError);
+                    return {
+                        success: false,
+                        saved: true,
+                        error: 'Workflow updated successfully but project transfer failed',
+                        details: {
+                            workflowUpdated: true,
+                            transferError: transferError instanceof Error ? transferError.message : 'Unknown error'
+                        }
+                    };
+                }
+            }
             let finalWorkflow = updatedWorkflow;
             let activationMessage = '';
             try {
@@ -409,7 +429,7 @@ async function handleUpdatePartialWorkflow(args, repository, context) {
                     nodeCount: finalWorkflow.nodes?.length || 0,
                     operationsApplied: diffResult.operationsApplied
                 },
-                message: `Workflow "${finalWorkflow.name}" updated successfully. Applied ${diffResult.operationsApplied} operations.${activationMessage} Use n8n_get_workflow with mode 'structure' to verify current state.`,
+                message: `Workflow "${finalWorkflow.name}" updated successfully. Applied ${diffResult.operationsApplied} operations.${transferMessage}${activationMessage} Use n8n_get_workflow with mode 'structure' to verify current state.`,
                 details: {
                     applied: diffResult.applied,
                     failed: diffResult.failed,
@@ -498,6 +518,8 @@ function inferIntentFromOperations(operations) {
                 return 'Activate workflow';
             case 'deactivateWorkflow':
                 return 'Deactivate workflow';
+            case 'transferWorkflow':
+                return `Transfer workflow to project ${op.destinationProjectId || ''}`.trim();
             default:
                 return `Workflow ${op.type}`;
         }

dist/mcp/tool-docs/workflow_management/n8n-update-partial-workflow.d.ts.map

@@ -1 +1 @@
-{"version":3,"file":"n8n-update-partial-workflow.d.ts","sourceRoot":"","sources":["../../../../src/mcp/tool-docs/workflow_management/n8n-update-partial-workflow.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,iBAAiB,EAAE,MAAM,UAAU,CAAC;AAE7C,eAAO,MAAM,2BAA2B,EAAE,iBA+ZzC,CAAC"}
+{"version":3,"file":"n8n-update-partial-workflow.d.ts","sourceRoot":"","sources":["../../../../src/mcp/tool-docs/workflow_management/n8n-update-partial-workflow.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,iBAAiB,EAAE,MAAM,UAAU,CAAC;AAE7C,eAAO,MAAM,2BAA2B,EAAE,iBAuazC,CAAC"}

dist/mcp/tool-docs/workflow_management/n8n-update-partial-workflow.js

@@ -5,7 +5,7 @@ exports.n8nUpdatePartialWorkflowDoc = {
     name: 'n8n_update_partial_workflow',
     category: 'workflow_management',
     essentials: {
-        description: 'Update workflow incrementally with diff operations. Types: addNode, removeNode, updateNode, moveNode, enable/disableNode, addConnection, removeConnection, rewireConnection, cleanStaleConnections, replaceConnections, updateSettings, updateName, add/removeTag, activateWorkflow, deactivateWorkflow. Supports smart parameters (branch, case) for multi-output nodes. Full support for AI connections (ai_languageModel, ai_tool, ai_memory, ai_embedding, ai_vectorStore, ai_document, ai_textSplitter, ai_outputParser).',
+        description: 'Update workflow incrementally with diff operations. Types: addNode, removeNode, updateNode, moveNode, enable/disableNode, addConnection, removeConnection, rewireConnection, cleanStaleConnections, replaceConnections, updateSettings, updateName, add/removeTag, activateWorkflow, deactivateWorkflow, transferWorkflow. Supports smart parameters (branch, case) for multi-output nodes. Full support for AI connections (ai_languageModel, ai_tool, ai_memory, ai_embedding, ai_vectorStore, ai_document, ai_textSplitter, ai_outputParser).',
         keyParameters: ['id', 'operations', 'continueOnError'],
         example: 'n8n_update_partial_workflow({id: "wf_123", operations: [{type: "rewireConnection", source: "IF", from: "Old", to: "New", branch: "true"}]})',
         performance: 'Fast (50-200ms)',
@@ -23,7 +23,8 @@ exports.n8nUpdatePartialWorkflowDoc = {
             'Batch AI component connections for atomic updates',
             'Auto-sanitization: ALL nodes auto-fixed during updates (operator structures, missing metadata)',
             'Node renames automatically update all connection references - no manual connection operations needed',
-            'Activate/deactivate workflows: Use activateWorkflow/deactivateWorkflow operations (requires activatable triggers like webhook/schedule)'
+            'Activate/deactivate workflows: Use activateWorkflow/deactivateWorkflow operations (requires activatable triggers like webhook/schedule)',
+            'Transfer workflows between projects: Use transferWorkflow with destinationProjectId (enterprise feature)'
         ]
     },
     full: {
@@ -56,6 +57,9 @@ exports.n8nUpdatePartialWorkflowDoc = {
 - **activateWorkflow**: Activate the workflow to enable automatic execution via triggers
 - **deactivateWorkflow**: Deactivate the workflow to prevent automatic execution
 
+### Project Management Operations (1 type):
+- **transferWorkflow**: Transfer the workflow to a different project. Requires \`destinationProjectId\`. Enterprise/cloud feature.
+
 ## Smart Parameters for Multi-Output Nodes
 
 For **IF nodes**, use semantic 'branch' parameter instead of technical sourceIndex:
@@ -346,7 +350,10 @@ n8n_update_partial_workflow({
             '// Migrate from deprecated continueOnFail to onError\nn8n_update_partial_workflow({id: "rm2", operations: [{type: "updateNode", nodeName: "HTTP Request", updates: {continueOnFail: null, onError: "continueErrorOutput"}}]})',
             '// Remove nested property\nn8n_update_partial_workflow({id: "rm3", operations: [{type: "updateNode", nodeName: "API Request", updates: {"parameters.authentication": null}}]})',
             '// Remove multiple properties\nn8n_update_partial_workflow({id: "rm4", operations: [{type: "updateNode", nodeName: "Data Processor", updates: {continueOnFail: null, alwaysOutputData: null, "parameters.legacy_option": null}}]})',
-            '// Remove entire array property\nn8n_update_partial_workflow({id: "rm5", operations: [{type: "updateNode", nodeName: "HTTP Request", updates: {"parameters.headers": null}}]})'
+            '// Remove entire array property\nn8n_update_partial_workflow({id: "rm5", operations: [{type: "updateNode", nodeName: "HTTP Request", updates: {"parameters.headers": null}}]})',
+            '\n// ============ PROJECT TRANSFER EXAMPLES ============',
+            '// Transfer workflow to a different project\nn8n_update_partial_workflow({id: "tf1", operations: [{type: "transferWorkflow", destinationProjectId: "project-abc-123"}]})',
+            '// Transfer and activate in one call\nn8n_update_partial_workflow({id: "tf2", operations: [{type: "transferWorkflow", destinationProjectId: "project-abc-123"}, {type: "activateWorkflow"}]})'
         ],
         useCases: [
             'Rewire connections when replacing nodes',
@@ -364,7 +371,8 @@ n8n_update_partial_workflow({
             'Add fallback language models to AI Agents',
             'Configure Vector Store retrieval systems',
             'Swap language models in existing AI workflows',
-            'Batch-update AI tool connections'
+            'Batch-update AI tool connections',
+            'Transfer workflows between team projects (enterprise)'
         ],
         performance: 'Very fast - typically 50-200ms. Much faster than full updates as only changes are processed.',
         bestPractices: [

dist/mcp/tool-docs/workflow_management/n8n-update-partial-workflow.js.map

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dist/mcp/tools-n8n-manager.js

@@ -137,7 +137,7 @@ exports.n8nManagementTools = [
     },
     {
         name: 'n8n_update_partial_workflow',
-        description: `Update workflow incrementally with diff operations. Types: addNode, removeNode, updateNode, moveNode, enable/disableNode, addConnection, removeConnection, updateSettings, updateName, add/removeTag. See tools_documentation("n8n_update_partial_workflow", "full") for details.`,
+        description: `Update workflow incrementally with diff operations. Types: addNode, removeNode, updateNode, moveNode, enable/disableNode, addConnection, removeConnection, updateSettings, updateName, add/removeTag, activate/deactivateWorkflow, transferWorkflow. See tools_documentation("n8n_update_partial_workflow", "full") for details.`,
         inputSchema: {
             type: 'object',
             additionalProperties: true,

dist/services/n8n-api-client.d.ts

@@ -20,6 +20,7 @@ export declare class N8nApiClient {
     getWorkflow(id: string): Promise<Workflow>;
     updateWorkflow(id: string, workflow: Partial<Workflow>): Promise<Workflow>;
     deleteWorkflow(id: string): Promise<Workflow>;
+    transferWorkflow(id: string, destinationProjectId: string): Promise<void>;
     activateWorkflow(id: string): Promise<Workflow>;
     deactivateWorkflow(id: string): Promise<Workflow>;
     listWorkflows(params?: WorkflowListParams): Promise<WorkflowListResponse>;

dist/services/n8n-api-client.d.ts.map

@@ -1 +1 @@
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+{"version":3,"file":"n8n-api-client.d.ts","sourceRoot":"","sources":["../../src/services/n8n-api-client.ts"],"names":[],"mappings":"AAEA,OAAO,EACL,QAAQ,EACR,kBAAkB,EAClB,oBAAoB,EACpB,SAAS,EACT,mBAAmB,EACnB,qBAAqB,EACrB,UAAU,EACV,oBAAoB,EACpB,sBAAsB,EACtB,GAAG,EACH,aAAa,EACb,eAAe,EACf,mBAAmB,EACnB,cAAc,EACd,QAAQ,EACR,cAAc,EAGd,mBAAmB,EACnB,uBAAuB,EACvB,uBAAuB,EACxB,MAAM,kBAAkB,CAAC;AAS1B,MAAM,WAAW,kBAAkB;IACjC,OAAO,EAAE,MAAM,CAAC;IAChB,MAAM,EAAE,MAAM,CAAC;IACf,OAAO,CAAC,EAAE,MAAM,CAAC;IACjB,UAAU,CAAC,EAAE,MAAM,CAAC;CACrB;AAED,qBAAa,YAAY;IACvB,OAAO,CAAC,MAAM,CAAgB;IAC9B,OAAO,CAAC,UAAU,CAAS;IAC3B,OAAO,CAAC,OAAO,CAAS;IACxB,OAAO,CAAC,WAAW,CAA+B;IAClD,OAAO,CAAC,cAAc,CAA+C;gBAEzD,MAAM,EAAE,kBAAkB;IAqDhC,UAAU,IAAI,OAAO,CAAC,cAAc,GAAG,IAAI,CAAC;YAyBpC,gBAAgB;IAa9B,oBAAoB,IAAI,cAAc,GAAG,IAAI;IAKvC,WAAW,IAAI,OAAO,CAAC,mBAAmB,CAAC;IA6C3C,cAAc,CAAC,QAAQ,EAAE,OAAO,CAAC,QAAQ,CAAC,GAAG,OAAO,CAAC,QAAQ,CAAC;IAU9D,WAAW,CAAC,EAAE,EAAE,MAAM,GAAG,OAAO,CAAC,QAAQ,CAAC;IAS1C,cAAc,CAAC,EAAE,EAAE,MAAM,EAAE,QAAQ,EAAE,OAAO,CAAC,QAAQ,CAAC,GAAG,OAAO,CAAC,QAAQ,CAAC;IAsC1E,cAAc,CAAC,EAAE,EAAE,MAAM,GAAG,OAAO,CAAC,QAAQ,CAAC;IAS7C,gBAAgB,CAAC,EAAE,EAAE,MAAM,EAAE,oBAAoB,EAAE,MAAM,GAAG,OAAO,CAAC,IAAI,CAAC;IAQzE,gBAAgB,CAAC,EAAE,EAAE,MAAM,GAAG,OAAO,CAAC,QAAQ,CAAC;IAS/C,kBAAkB,CAAC,EAAE,EAAE,MAAM,GAAG,OAAO,CAAC,QAAQ,CAAC;IAsBjD,aAAa,CAAC,MAAM,GAAE,kBAAuB,GAAG,OAAO,CAAC,oBAAoB,CAAC;IAU7E,YAAY,CAAC,EAAE,EAAE,MAAM,EAAE,WAAW,UAAQ,GAAG,OAAO,CAAC,SAAS,CAAC;IAwBjE,cAAc,CAAC,MAAM,GAAE,mBAAwB,GAAG,OAAO,CAAC,qBAAqB,CAAC;IAShF,eAAe,CAAC,EAAE,EAAE,MAAM,GAAG,OAAO,CAAC,IAAI,CAAC;IAS1C,cAAc,CAAC,OAAO,EAAE,cAAc,GAAG,OAAO,CAAC,GAAG,CAAC;IAiErD,eAAe,CAAC,MAAM,GAAE,oBAAyB,GAAG,OAAO,CAAC,sBAAsB,CAAC;IASnF,aAAa,CAAC,EAAE,EAAE,MAAM,GAAG,OAAO,CAAC,UAAU,CAAC;IAS9C,gBAAgB,CAAC,UAAU,EAAE,OAAO,CAAC,UAAU,CAAC,GAAG,OAAO,CAAC,UAAU,CAAC;IAStE,gBAAgB,CAAC,EAAE,EAAE,MAAM,EAAE,UAAU,EAAE,OAAO,CAAC,UAAU,CAAC,GAAG,OAAO,CAAC,UAAU,CAAC;IASlF,gBAAgB,CAAC,EAAE,EAAE,MAAM,GAAG,OAAO,CAAC,IAAI,CAAC;IAsB3C,QAAQ,CAAC,MAAM,GAAE,aAAkB,GAAG,OAAO,CAAC,eAAe,CAAC;IAS9D,SAAS,CAAC,GAAG,EAAE,OAAO,CAAC,GAAG,CAAC,GAAG,OAAO,CAAC,GAAG,CAAC;IAS1C,SAAS,CAAC,EAAE,EAAE,MAAM,EAAE,GAAG,EAAE,OAAO,CAAC,GAAG,CAAC,GAAG,OAAO,CAAC,GAAG,CAAC;IAStD,SAAS,CAAC,EAAE,EAAE,MAAM,GAAG,OAAO,CAAC,IAAI,CAAC;IAQpC,kBAAkB,CAAC,UAAU,EAAE,MAAM,EAAE,MAAM,EAAE,MAAM,EAAE,GAAG,OAAO,CAAC,GAAG,EAAE,CAAC;IAUxE,sBAAsB,IAAI,OAAO,CAAC,mBAAmB,CAAC;IAStD,iBAAiB,CAAC,KAAK,UAAQ,GAAG,OAAO,CAAC,uBAAuB,CAAC;IASlE,iBAAiB,CACrB,OAAO,EAAE,MAAM,EACf,SAAS,CAAC,EAAE,MAAM,EAAE,GACnB,OAAO,CAAC,uBAAuB,CAAC;IAa7B,YAAY,IAAI,OAAO,CAAC,QAAQ,EAAE,CAAC;IAWnC,cAAc,CAAC,QAAQ,EAAE,OAAO,CAAC,QAAQ,CAAC,GAAG,OAAO,CAAC,QAAQ,CAAC;IAS9D,cAAc,CAAC,EAAE,EAAE,MAAM,EAAE,QAAQ,EAAE,OAAO,CAAC,QAAQ,CAAC,GAAG,OAAO,CAAC,QAAQ,CAAC;IAS1E,cAAc,CAAC,EAAE,EAAE,MAAM,GAAG,OAAO,CAAC,IAAI,CAAC;IAiB/C,OAAO,CAAC,oBAAoB;CAmC7B"}

dist/services/n8n-api-client.js

@@ -194,6 +194,14 @@ class N8nApiClient {
             throw (0, n8n_errors_1.handleN8nApiError)(error);
         }
     }
+    async transferWorkflow(id, destinationProjectId) {
+        try {
+            await this.client.put(`/workflows/${id}/transfer`, { destinationProjectId });
+        }
+        catch (error) {
+            throw (0, n8n_errors_1.handleN8nApiError)(error);
+        }
+    }
     async activateWorkflow(id) {
         try {
             const response = await this.client.post(`/workflows/${id}/activate`, {});

dist/services/workflow-diff-engine.d.ts

@@ -7,6 +7,7 @@ export declare class WorkflowDiffEngine {
     private removedNodeNames;
     private tagsToAdd;
     private tagsToRemove;
+    private transferToProjectId;
     applyDiff(workflow: Workflow, request: WorkflowDiffRequest): Promise<WorkflowDiffResult>;
     private validateOperation;
     private applyOperation;
@@ -36,6 +37,8 @@ export declare class WorkflowDiffEngine {
     private validateDeactivateWorkflow;
     private applyActivateWorkflow;
     private applyDeactivateWorkflow;
+    private validateTransferWorkflow;
+    private applyTransferWorkflow;
     private validateCleanStaleConnections;
     private validateReplaceConnections;
     private applyCleanStaleConnections;

dist/services/workflow-diff-engine.d.ts.map

@@ -1 +1 @@
-{"version":3,"file":"workflow-diff-engine.d.ts","sourceRoot":"","sources":["../../src/services/workflow-diff-engine.ts"],"names":[],"mappings":"AAMA,OAAO,EAEL,mBAAmB,EACnB,kBAAkB,EAsBnB,MAAM,wBAAwB,CAAC;AAChC,OAAO,EAAE,QAAQ,EAAoC,MAAM,kBAAkB,CAAC;AAY9E,qBAAa,kBAAkB;IAE7B,OAAO,CAAC,SAAS,CAAkC;IAEnD,OAAO,CAAC,QAAQ,CAAqC;IAErD,OAAO,CAAC,eAAe,CAAqB;IAE5C,OAAO,CAAC,gBAAgB,CAAqB;IAE7C,OAAO,CAAC,SAAS,CAAgB;IACjC,OAAO,CAAC,YAAY,CAAgB;IAK9B,SAAS,CACb,QAAQ,EAAE,QAAQ,EAClB,OAAO,EAAE,mBAAmB,GAC3B,OAAO,CAAC,kBAAkB,CAAC;IAqN9B,OAAO,CAAC,iBAAiB;IAwCzB,OAAO,CAAC,cAAc;IAyDtB,OAAO,CAAC,eAAe;IAwBvB,OAAO,CAAC,kBAAkB;IAuB1B,OAAO,CAAC,kBAAkB;IAoC1B,OAAO,CAAC,gBAAgB;IAQxB,OAAO,CAAC,kBAAkB;IAU1B,OAAO,CAAC,qBAAqB;IAkD7B,OAAO,CAAC,wBAAwB;IA6ChC,OAAO,CAAC,wBAAwB;IAmDhC,OAAO,CAAC,YAAY;IA4BpB,OAAO,CAAC,eAAe;IAwCvB,OAAO,CAAC,eAAe;IA0BvB,OAAO,CAAC,aAAa;IAOrB,OAAO,CAAC,eAAe;IAOvB,OAAO,CAAC,gBAAgB;IAWxB,OAAO,CAAC,sBAAsB;IAwD9B,OAAO,CAAC,kBAAkB;IA6C1B,OAAO,CAAC,qBAAqB;IAuC7B,OAAO,CAAC,qBAAqB;IA0B7B,OAAO,CAAC,mBAAmB;IAW3B,OAAO,CAAC,eAAe;IAIvB,OAAO,CAAC,WAAW;IAYnB,OAAO,CAAC,cAAc;IAatB,OAAO,CAAC,wBAAwB;IAchC,OAAO,CAAC,0BAA0B;IAMlC,OAAO,CAAC,qBAAqB;IAM7B,OAAO,CAAC,uBAAuB;IAO/B,OAAO,CAAC,6BAA6B;IAKrC,OAAO,CAAC,0BAA0B;IA0BlC,OAAO,CAAC,0BAA0B;IA+ElC,OAAO,CAAC,uBAAuB;IAe/B,OAAO,CAAC,0BAA0B;IAkElC,OAAO,CAAC,iBAAiB;IAkBzB,OAAO,CAAC,QAAQ;IAsChB,OAAO,CAAC,uBAAuB;IAW/B,OAAO,CAAC,iBAAiB;CAoB1B"}
+{"version":3,"file":"workflow-diff-engine.d.ts","sourceRoot":"","sources":["../../src/services/workflow-diff-engine.ts"],"names":[],"mappings":"AAMA,OAAO,EAEL,mBAAmB,EACnB,kBAAkB,EAuBnB,MAAM,wBAAwB,CAAC;AAChC,OAAO,EAAE,QAAQ,EAAoC,MAAM,kBAAkB,CAAC;AAY9E,qBAAa,kBAAkB;IAE7B,OAAO,CAAC,SAAS,CAAkC;IAEnD,OAAO,CAAC,QAAQ,CAAqC;IAErD,OAAO,CAAC,eAAe,CAAqB;IAE5C,OAAO,CAAC,gBAAgB,CAAqB;IAE7C,OAAO,CAAC,SAAS,CAAgB;IACjC,OAAO,CAAC,YAAY,CAAgB;IAEpC,OAAO,CAAC,mBAAmB,CAAqB;IAK1C,SAAS,CACb,QAAQ,EAAE,QAAQ,EAClB,OAAO,EAAE,mBAAmB,GAC3B,OAAO,CAAC,kBAAkB,CAAC;IAgO9B,OAAO,CAAC,iBAAiB;IA0CzB,OAAO,CAAC,cAAc;IA4DtB,OAAO,CAAC,eAAe;IAwBvB,OAAO,CAAC,kBAAkB;IAuB1B,OAAO,CAAC,kBAAkB;IAoC1B,OAAO,CAAC,gBAAgB;IAQxB,OAAO,CAAC,kBAAkB;IAU1B,OAAO,CAAC,qBAAqB;IAkD7B,OAAO,CAAC,wBAAwB;IA6ChC,OAAO,CAAC,wBAAwB;IAmDhC,OAAO,CAAC,YAAY;IA4BpB,OAAO,CAAC,eAAe;IAwCvB,OAAO,CAAC,eAAe;IA0BvB,OAAO,CAAC,aAAa;IAOrB,OAAO,CAAC,eAAe;IAOvB,OAAO,CAAC,gBAAgB;IAWxB,OAAO,CAAC,sBAAsB;IAwD9B,OAAO,CAAC,kBAAkB;IA6C1B,OAAO,CAAC,qBAAqB;IAuC7B,OAAO,CAAC,qBAAqB;IA0B7B,OAAO,CAAC,mBAAmB;IAW3B,OAAO,CAAC,eAAe;IAIvB,OAAO,CAAC,WAAW;IAYnB,OAAO,CAAC,cAAc;IAatB,OAAO,CAAC,wBAAwB;IAchC,OAAO,CAAC,0BAA0B;IAMlC,OAAO,CAAC,qBAAqB;IAM7B,OAAO,CAAC,uBAAuB;IAO/B,OAAO,CAAC,wBAAwB;IAOhC,OAAO,CAAC,qBAAqB;IAK7B,OAAO,CAAC,6BAA6B;IAKrC,OAAO,CAAC,0BAA0B;IA0BlC,OAAO,CAAC,0BAA0B;IA+ElC,OAAO,CAAC,uBAAuB;IAe/B,OAAO,CAAC,0BAA0B;IAmElC,OAAO,CAAC,iBAAiB;IAkBzB,OAAO,CAAC,QAAQ;IAsChB,OAAO,CAAC,uBAAuB;IAW/B,OAAO,CAAC,iBAAiB;CAoB1B"}

dist/services/workflow-diff-engine.js

@@ -23,6 +23,7 @@ class WorkflowDiffEngine {
             this.removedNodeNames.clear();
             this.tagsToAdd = [];
             this.tagsToRemove = [];
+            this.transferToProjectId = undefined;
             const workflowCopy = JSON.parse(JSON.stringify(workflow));
             const nodeOperationTypes = ['addNode', 'removeNode', 'updateNode', 'moveNode', 'enableNode', 'disableNode'];
             const nodeOperations = [];
@@ -81,6 +82,10 @@ class WorkflowDiffEngine {
                         failed: failedIndices
                     };
                 }
+                const shouldActivate = workflowCopy._shouldActivate === true;
+                const shouldDeactivate = workflowCopy._shouldDeactivate === true;
+                delete workflowCopy._shouldActivate;
+                delete workflowCopy._shouldDeactivate;
                 const success = appliedIndices.length > 0;
                 return {
                     success,
@@ -91,8 +96,11 @@ class WorkflowDiffEngine {
                     warnings: this.warnings.length > 0 ? this.warnings : undefined,
                     applied: appliedIndices,
                     failed: failedIndices,
+                    shouldActivate: shouldActivate || undefined,
+                    shouldDeactivate: shouldDeactivate || undefined,
                     tagsToAdd: this.tagsToAdd.length > 0 ? this.tagsToAdd : undefined,
-                    tagsToRemove: this.tagsToRemove.length > 0 ? this.tagsToRemove : undefined
+                    tagsToRemove: this.tagsToRemove.length > 0 ? this.tagsToRemove : undefined,
+                    transferToProjectId: this.transferToProjectId || undefined
                 };
             }
             else {
@@ -181,7 +189,8 @@ class WorkflowDiffEngine {
                     shouldActivate: shouldActivate || undefined,
                     shouldDeactivate: shouldDeactivate || undefined,
                     tagsToAdd: this.tagsToAdd.length > 0 ? this.tagsToAdd : undefined,
-                    tagsToRemove: this.tagsToRemove.length > 0 ? this.tagsToRemove : undefined
+                    tagsToRemove: this.tagsToRemove.length > 0 ? this.tagsToRemove : undefined,
+                    transferToProjectId: this.transferToProjectId || undefined
                 };
             }
         }
@@ -220,6 +229,8 @@ class WorkflowDiffEngine {
             case 'addTag':
             case 'removeTag':
                 return null;
+            case 'transferWorkflow':
+                return this.validateTransferWorkflow(workflow, operation);
             case 'activateWorkflow':
                 return this.validateActivateWorkflow(workflow, operation);
             case 'deactivateWorkflow':
@@ -285,6 +296,9 @@ class WorkflowDiffEngine {
             case 'replaceConnections':
                 this.applyReplaceConnections(workflow, operation);
                 break;
+            case 'transferWorkflow':
+                this.applyTransferWorkflow(workflow, operation);
+                break;
         }
     }
     validateAddNode(workflow, operation) {
@@ -699,6 +713,15 @@ class WorkflowDiffEngine {
     applyDeactivateWorkflow(workflow, operation) {
         workflow._shouldDeactivate = true;
     }
+    validateTransferWorkflow(_workflow, operation) {
+        if (!operation.destinationProjectId) {
+            return 'transferWorkflow requires a non-empty destinationProjectId string';
+        }
+        return null;
+    }
+    applyTransferWorkflow(_workflow, operation) {
+        this.transferToProjectId = operation.destinationProjectId;
+    }
     validateCleanStaleConnections(workflow, operation) {
         return null;
     }
@@ -806,9 +829,10 @@ class WorkflowDiffEngine {
                     for (let connIndex = 0; connIndex < connectionsAtIndex.length; connIndex++) {
                         const connection = connectionsAtIndex[connIndex];
                         if (renames.has(connection.node)) {
+                            const oldTargetName = connection.node;
                             const newTargetName = renames.get(connection.node);
                             connection.node = newTargetName;
-                            logger.debug(`Updated connection: ${sourceName}[${outputType}][${outputIndex}][${connIndex}].node: "${connection.node}" → "${newTargetName}"`);
+                            logger.debug(`Updated connection: ${sourceName}[${outputType}][${outputIndex}][${connIndex}].node: "${oldTargetName}" → "${newTargetName}"`);
                         }
                     }
                 }

dist/types/workflow-diff.d.ts

@@ -94,6 +94,10 @@ export interface ActivateWorkflowOperation extends DiffOperation {
 export interface DeactivateWorkflowOperation extends DiffOperation {
     type: 'deactivateWorkflow';
 }
+export interface TransferWorkflowOperation extends DiffOperation {
+    type: 'transferWorkflow';
+    destinationProjectId: string;
+}
 export interface CleanStaleConnectionsOperation extends DiffOperation {
     type: 'cleanStaleConnections';
     dryRun?: boolean;
@@ -110,7 +114,7 @@ export interface ReplaceConnectionsOperation extends DiffOperation {
         };
     };
 }
-export type WorkflowDiffOperation = AddNodeOperation | RemoveNodeOperation | UpdateNodeOperation | MoveNodeOperation | EnableNodeOperation | DisableNodeOperation | AddConnectionOperation | RemoveConnectionOperation | RewireConnectionOperation | UpdateSettingsOperation | UpdateNameOperation | AddTagOperation | RemoveTagOperation | ActivateWorkflowOperation | DeactivateWorkflowOperation | CleanStaleConnectionsOperation | ReplaceConnectionsOperation;
+export type WorkflowDiffOperation = AddNodeOperation | RemoveNodeOperation | UpdateNodeOperation | MoveNodeOperation | EnableNodeOperation | DisableNodeOperation | AddConnectionOperation | RemoveConnectionOperation | RewireConnectionOperation | UpdateSettingsOperation | UpdateNameOperation | AddTagOperation | RemoveTagOperation | ActivateWorkflowOperation | DeactivateWorkflowOperation | CleanStaleConnectionsOperation | ReplaceConnectionsOperation | TransferWorkflowOperation;
 export interface WorkflowDiffRequest {
     id: string;
     operations: WorkflowDiffOperation[];
@@ -139,6 +143,7 @@ export interface WorkflowDiffResult {
     shouldDeactivate?: boolean;
     tagsToAdd?: string[];
     tagsToRemove?: string[];
+    transferToProjectId?: string;
 }
 export interface NodeReference {
     id?: string;

dist/types/workflow-diff.d.ts.map

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dist/types/workflow-diff.js.map

@@ -1 +1 @@
-{"version":3,"file":"workflow-diff.js","sourceRoot":"","sources":["../../src/types/workflow-diff.ts"],"names":[],"mappings":";;AA2MA,0CAIC;AAED,sDAGC;AAED,kDAGC;AAdD,SAAgB,eAAe,CAAC,EAAyB;IAGvD,OAAO,CAAC,SAAS,EAAE,YAAY,EAAE,YAAY,EAAE,UAAU,EAAE,YAAY,EAAE,aAAa,CAAC,CAAC,QAAQ,CAAC,EAAE,CAAC,IAAI,CAAC,CAAC;AAC5G,CAAC;AAED,SAAgB,qBAAqB,CAAC,EAAyB;IAE7D,OAAO,CAAC,eAAe,EAAE,kBAAkB,EAAE,kBAAkB,EAAE,uBAAuB,EAAE,oBAAoB,CAAC,CAAC,QAAQ,CAAC,EAAE,CAAC,IAAI,CAAC,CAAC;AACpI,CAAC;AAED,SAAgB,mBAAmB,CAAC,EAAyB;IAE3D,OAAO,CAAC,gBAAgB,EAAE,YAAY,EAAE,QAAQ,EAAE,WAAW,CAAC,CAAC,QAAQ,CAAC,EAAE,CAAC,IAAI,CAAC,CAAC;AACnF,CAAC"}
+{"version":3,"file":"workflow-diff.js","sourceRoot":"","sources":["../../src/types/workflow-diff.ts"],"names":[],"mappings":";;AAkNA,0CAIC;AAED,sDAGC;AAED,kDAGC;AAdD,SAAgB,eAAe,CAAC,EAAyB;IAGvD,OAAO,CAAC,SAAS,EAAE,YAAY,EAAE,YAAY,EAAE,UAAU,EAAE,YAAY,EAAE,aAAa,CAAC,CAAC,QAAQ,CAAC,EAAE,CAAC,IAAI,CAAC,CAAC;AAC5G,CAAC;AAED,SAAgB,qBAAqB,CAAC,EAAyB;IAE7D,OAAO,CAAC,eAAe,EAAE,kBAAkB,EAAE,kBAAkB,EAAE,uBAAuB,EAAE,oBAAoB,CAAC,CAAC,QAAQ,CAAC,EAAE,CAAC,IAAI,CAAC,CAAC;AACpI,CAAC;AAED,SAAgB,mBAAmB,CAAC,EAAyB;IAE3D,OAAO,CAAC,gBAAgB,EAAE,YAAY,EAAE,QAAQ,EAAE,WAAW,CAAC,CAAC,QAAQ,CAAC,EAAE,CAAC,IAAI,CAAC,CAAC;AACnF,CAAC"}

package.json

@@ -1,6 +1,6 @@
 {
   "name": "n8n-mcp",
-  "version": "2.37.4",
+  "version": "2.40.0",
   "description": "Integration between n8n workflow automation and Model Context Protocol (MCP)",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",

src/mcp/handlers-n8n-manager.ts

@@ -8,7 +8,7 @@ import {
   WebhookRequest,
   McpToolResponse,
   ExecutionFilterOptions,
-  ExecutionMode
+  ExecutionMode,
 } from '../types/n8n-api';
 import type { TriggerType, TestWorkflowInput } from '../triggers/types';
 import {
@@ -383,6 +383,7 @@ const createWorkflowSchema = z.object({
     executionTimeout: z.number().optional(),
     errorWorkflow: z.string().optional(),
   }).optional(),
+  projectId: z.string().optional(),
 });
 
 const updateWorkflowSchema = z.object({
@@ -1974,7 +1975,7 @@ export async function handleDiagnostic(request: any, context?: InstanceContext):
 
   // Check which tools are available
   const documentationTools = 7; // Base documentation tools (after v2.26.0 consolidation)
-  const managementTools = apiConfigured ? 13 : 0; // Management tools requiring API (includes n8n_deploy_template)
+  const managementTools = apiConfigured ? 14 : 0; // Management tools requiring API (includes n8n_manage_datatable)
   const totalTools = documentationTools + managementTools;
 
   // Check npm version
@@ -2688,3 +2689,243 @@ export async function handleTriggerWebhookWorkflow(args: unknown, context?: Inst
     };
   }
 }
+
+// ========================================================================
+// Data Table Handlers
+// ========================================================================
+
+// Shared Zod schemas for data table operations
+const dataTableFilterConditionSchema = z.object({
+  columnName: z.string().min(1),
+  condition: z.enum(['eq', 'neq', 'like', 'ilike', 'gt', 'gte', 'lt', 'lte']),
+  value: z.any(),
+});
+
+const dataTableFilterSchema = z.object({
+  type: z.enum(['and', 'or']).optional().default('and'),
+  filters: z.array(dataTableFilterConditionSchema).min(1, 'At least one filter condition is required'),
+});
+
+// Shared base schema for actions requiring a tableId
+const tableIdSchema = z.object({
+  tableId: z.string().min(1, 'tableId is required'),
+});
+
+// Per-action Zod schemas
+const createTableSchema = z.object({
+  name: z.string().min(1, 'Table name cannot be empty'),
+  columns: z.array(z.object({
+    name: z.string().min(1, 'Column name cannot be empty'),
+    type: z.enum(['string', 'number', 'boolean', 'date', 'json']).optional(),
+  })).optional(),
+});
+
+const listTablesSchema = z.object({
+  limit: z.number().min(1).max(100).optional(),
+  cursor: z.string().optional(),
+});
+
+const updateTableSchema = tableIdSchema.extend({
+  name: z.string().min(1, 'New table name cannot be empty'),
+});
+
+const getRowsSchema = tableIdSchema.extend({
+  limit: z.number().min(1).max(100).optional(),
+  cursor: z.string().optional(),
+  filter: z.union([dataTableFilterSchema, z.string()]).optional(),
+  sortBy: z.string().optional(),
+  search: z.string().optional(),
+});
+
+const insertRowsSchema = tableIdSchema.extend({
+  data: z.array(z.record(z.unknown())).min(1, 'At least one row is required'),
+  returnType: z.enum(['count', 'id', 'all']).optional(),
+});
+
+// Shared schema for update/upsert (identical structure)
+const mutateRowsSchema = tableIdSchema.extend({
+  filter: dataTableFilterSchema,
+  data: z.record(z.unknown()),
+  returnData: z.boolean().optional(),
+  dryRun: z.boolean().optional(),
+});
+
+const deleteRowsSchema = tableIdSchema.extend({
+  filter: dataTableFilterSchema,
+  returnData: z.boolean().optional(),
+  dryRun: z.boolean().optional(),
+});
+
+function handleDataTableError(error: unknown): McpToolResponse {
+  if (error instanceof z.ZodError) {
+    return { success: false, error: 'Invalid input', details: { errors: error.errors } };
+  }
+  if (error instanceof N8nApiError) {
+    return {
+      success: false,
+      error: getUserFriendlyErrorMessage(error),
+      code: error.code,
+      details: error.details as Record<string, unknown> | undefined,
+    };
+  }
+  return { success: false, error: error instanceof Error ? error.message : 'Unknown error occurred' };
+}
+
+export async function handleCreateTable(args: unknown, context?: InstanceContext): Promise<McpToolResponse> {
+  try {
+    const client = ensureApiConfigured(context);
+    const input = createTableSchema.parse(args);
+    const dataTable = await client.createDataTable(input);
+    if (!dataTable || !dataTable.id) {
+      return { success: false, error: 'Data table creation failed: n8n API returned an empty or invalid response' };
+    }
+    return {
+      success: true,
+      data: { id: dataTable.id, name: dataTable.name },
+      message: `Data table "${dataTable.name}" created with ID: ${dataTable.id}`,
+    };
+  } catch (error) {
+    return handleDataTableError(error);
+  }
+}
+
+export async function handleListTables(args: unknown, context?: InstanceContext): Promise<McpToolResponse> {
+  try {
+    const client = ensureApiConfigured(context);
+    const input = listTablesSchema.parse(args || {});
+    const result = await client.listDataTables(input);
+    return {
+      success: true,
+      data: {
+        tables: result.data,
+        count: result.data.length,
+        nextCursor: result.nextCursor || undefined,
+      },
+    };
+  } catch (error) {
+    return handleDataTableError(error);
+  }
+}
+
+export async function handleGetTable(args: unknown, context?: InstanceContext): Promise<McpToolResponse> {
+  try {
+    const client = ensureApiConfigured(context);
+    const { tableId } = tableIdSchema.parse(args);
+    const dataTable = await client.getDataTable(tableId);
+    return { success: true, data: dataTable };
+  } catch (error) {
+    return handleDataTableError(error);
+  }
+}
+
+export async function handleUpdateTable(args: unknown, context?: InstanceContext): Promise<McpToolResponse> {
+  try {
+    const client = ensureApiConfigured(context);
+    const { tableId, name } = updateTableSchema.parse(args);
+    const dataTable = await client.updateDataTable(tableId, { name });
+    return {
+      success: true,
+      data: dataTable,
+      message: `Data table renamed to "${dataTable.name}"`,
+    };
+  } catch (error) {
+    return handleDataTableError(error);
+  }
+}
+
+export async function handleDeleteTable(args: unknown, context?: InstanceContext): Promise<McpToolResponse> {
+  try {
+    const client = ensureApiConfigured(context);
+    const { tableId } = tableIdSchema.parse(args);
+    await client.deleteDataTable(tableId);
+    return { success: true, message: `Data table ${tableId} deleted successfully` };
+  } catch (error) {
+    return handleDataTableError(error);
+  }
+}
+
+export async function handleGetRows(args: unknown, context?: InstanceContext): Promise<McpToolResponse> {
+  try {
+    const client = ensureApiConfigured(context);
+    const { tableId, filter, ...params } = getRowsSchema.parse(args);
+    const queryParams: Record<string, unknown> = { ...params };
+    if (filter) {
+      queryParams.filter = typeof filter === 'string' ? filter : JSON.stringify(filter);
+    }
+    const result = await client.getDataTableRows(tableId, queryParams as any);
+    return {
+      success: true,
+      data: {
+        rows: result.data,
+        count: result.data.length,
+        nextCursor: result.nextCursor || undefined,
+      },
+    };
+  } catch (error) {
+    return handleDataTableError(error);
+  }
+}
+
+export async function handleInsertRows(args: unknown, context?: InstanceContext): Promise<McpToolResponse> {
+  try {
+    const client = ensureApiConfigured(context);
+    const { tableId, ...params } = insertRowsSchema.parse(args);
+    const result = await client.insertDataTableRows(tableId, params);
+    return {
+      success: true,
+      data: result,
+      message: `Rows inserted into data table ${tableId}`,
+    };
+  } catch (error) {
+    return handleDataTableError(error);
+  }
+}
+
+export async function handleUpdateRows(args: unknown, context?: InstanceContext): Promise<McpToolResponse> {
+  try {
+    const client = ensureApiConfigured(context);
+    const { tableId, ...params } = mutateRowsSchema.parse(args);
+    const result = await client.updateDataTableRows(tableId, params);
+    return {
+      success: true,
+      data: result,
+      message: params.dryRun ? 'Dry run: rows matched (no changes applied)' : 'Rows updated successfully',
+    };
+  } catch (error) {
+    return handleDataTableError(error);
+  }
+}
+
+export async function handleUpsertRows(args: unknown, context?: InstanceContext): Promise<McpToolResponse> {
+  try {
+    const client = ensureApiConfigured(context);
+    const { tableId, ...params } = mutateRowsSchema.parse(args);
+    const result = await client.upsertDataTableRow(tableId, params);
+    return {
+      success: true,
+      data: result,
+      message: params.dryRun ? 'Dry run: upsert previewed (no changes applied)' : 'Row upserted successfully',
+    };
+  } catch (error) {
+    return handleDataTableError(error);
+  }
+}
+
+export async function handleDeleteRows(args: unknown, context?: InstanceContext): Promise<McpToolResponse> {
+  try {
+    const client = ensureApiConfigured(context);
+    const { tableId, filter, ...params } = deleteRowsSchema.parse(args);
+    const queryParams = {
+      filter: JSON.stringify(filter),
+      ...params,
+    };
+    const result = await client.deleteDataTableRows(tableId, queryParams as any);
+    return {
+      success: true,
+      data: result,
+      message: params.dryRun ? 'Dry run: rows matched for deletion (no changes applied)' : 'Rows deleted successfully',
+    };
+  } catch (error) {
+    return handleDataTableError(error);
+  }
+}

src/mcp/handlers-workflow-diff.ts

@@ -68,6 +68,8 @@ const workflowDiffSchema = z.object({
     settings: z.any().optional(),
     name: z.string().optional(),
     tag: z.string().optional(),
+    // Transfer operation
+    destinationProjectId: z.string().min(1).optional(),
     // Aliases: LLMs often use "id" instead of "nodeId" — accept both
     id: z.string().optional(),
   }).transform((op) => {
@@ -370,6 +372,26 @@ export async function handleUpdatePartialWorkflow(
         }
       }
 
+      // Handle project transfer if requested (before activation so workflow is in target project first)
+      let transferMessage = '';
+      if (diffResult.transferToProjectId) {
+        try {
+          await client.transferWorkflow(input.id, diffResult.transferToProjectId);
+          transferMessage = ` Workflow transferred to project ${diffResult.transferToProjectId}.`;
+        } catch (transferError) {
+          logger.error('Failed to transfer workflow to project', transferError);
+          return {
+            success: false,
+            saved: true,
+            error: 'Workflow updated successfully but project transfer failed',
+            details: {
+              workflowUpdated: true,
+              transferError: transferError instanceof Error ? transferError.message : 'Unknown error'
+            }
+          };
+        }
+      }
+
       // Handle activation/deactivation if requested
       let finalWorkflow = updatedWorkflow;
       let activationMessage = '';
@@ -454,7 +476,7 @@ export async function handleUpdatePartialWorkflow(
           nodeCount: finalWorkflow.nodes?.length || 0,
           operationsApplied: diffResult.operationsApplied
         },
-        message: `Workflow "${finalWorkflow.name}" updated successfully. Applied ${diffResult.operationsApplied} operations.${activationMessage} Use n8n_get_workflow with mode 'structure' to verify current state.`,
+        message: `Workflow "${finalWorkflow.name}" updated successfully. Applied ${diffResult.operationsApplied} operations.${transferMessage}${activationMessage} Use n8n_get_workflow with mode 'structure' to verify current state.`,
         details: {
           applied: diffResult.applied,
           failed: diffResult.failed,
@@ -559,6 +581,8 @@ function inferIntentFromOperations(operations: any[]): string {
         return 'Activate workflow';
       case 'deactivateWorkflow':
         return 'Deactivate workflow';
+      case 'transferWorkflow':
+        return `Transfer workflow to project ${op.destinationProjectId || ''}`.trim();
       default:
         return `Workflow ${op.type}`;
     }

src/mcp/server.ts

@@ -1029,6 +1029,11 @@ export class N8NDocumentationMCPServer {
           ? { valid: true, errors: [] }
           : { valid: false, errors: [{ field: 'action', message: 'action is required' }] };
         break;
+      case 'n8n_manage_datatable':
+        validationResult = args.action
+          ? { valid: true, errors: [] }
+          : { valid: false, errors: [{ field: 'action', message: 'action is required' }] };
+        break;
       case 'n8n_deploy_template':
         // Requires templateId parameter
         validationResult = args.templateId !== undefined
@@ -1496,6 +1501,26 @@ export class N8NDocumentationMCPServer {
         if (!this.repository) throw new Error('Repository not initialized');
         return n8nHandlers.handleDeployTemplate(args, this.templateService, this.repository, this.instanceContext);
 
+      case 'n8n_manage_datatable': {
+        this.validateToolParams(name, args, ['action']);
+        const dtAction = args.action;
+        // Each handler validates its own inputs via Zod schemas
+        switch (dtAction) {
+          case 'createTable':  return n8nHandlers.handleCreateTable(args, this.instanceContext);
+          case 'listTables':   return n8nHandlers.handleListTables(args, this.instanceContext);
+          case 'getTable':     return n8nHandlers.handleGetTable(args, this.instanceContext);
+          case 'updateTable':  return n8nHandlers.handleUpdateTable(args, this.instanceContext);
+          case 'deleteTable':  return n8nHandlers.handleDeleteTable(args, this.instanceContext);
+          case 'getRows':      return n8nHandlers.handleGetRows(args, this.instanceContext);
+          case 'insertRows':   return n8nHandlers.handleInsertRows(args, this.instanceContext);
+          case 'updateRows':   return n8nHandlers.handleUpdateRows(args, this.instanceContext);
+          case 'upsertRows':   return n8nHandlers.handleUpsertRows(args, this.instanceContext);
+          case 'deleteRows':   return n8nHandlers.handleDeleteRows(args, this.instanceContext);
+          default:
+            throw new Error(`Unknown action: ${dtAction}. Valid actions: createTable, listTables, getTable, updateTable, deleteTable, getRows, insertRows, updateRows, upsertRows, deleteRows`);
+        }
+      }
+
       default:
         throw new Error(`Unknown tool: ${name}`);
     }

src/mcp/tool-docs/index.ts

@@ -22,7 +22,8 @@ import {
   n8nTestWorkflowDoc,
   n8nExecutionsDoc,
   n8nWorkflowVersionsDoc,
-  n8nDeployTemplateDoc
+  n8nDeployTemplateDoc,
+  n8nManageDatatableDoc
 } from './workflow_management';
 
 // Combine all tool documentations into a single object
@@ -60,7 +61,8 @@ export const toolsDocumentation: Record<string, ToolDocumentation> = {
   n8n_test_workflow: n8nTestWorkflowDoc,
   n8n_executions: n8nExecutionsDoc,
   n8n_workflow_versions: n8nWorkflowVersionsDoc,
-  n8n_deploy_template: n8nDeployTemplateDoc
+  n8n_deploy_template: n8nDeployTemplateDoc,
+  n8n_manage_datatable: n8nManageDatatableDoc
 };
 
 // Re-export types

src/mcp/tool-docs/workflow_management/index.ts

@@ -10,3 +10,4 @@ export { n8nTestWorkflowDoc } from './n8n-test-workflow';
 export { n8nExecutionsDoc } from './n8n-executions';
 export { n8nWorkflowVersionsDoc } from './n8n-workflow-versions';
 export { n8nDeployTemplateDoc } from './n8n-deploy-template';
+export { n8nManageDatatableDoc } from './n8n-manage-datatable';

src/mcp/tool-docs/workflow_management/n8n-manage-datatable.ts

@@ -0,0 +1,109 @@
+import { ToolDocumentation } from '../types';
+
+export const n8nManageDatatableDoc: ToolDocumentation = {
+  name: 'n8n_manage_datatable',
+  category: 'workflow_management',
+  essentials: {
+    description: 'Manage n8n data tables and rows. Unified tool for table CRUD and row operations with filtering, pagination, and dry-run support.',
+    keyParameters: ['action', 'tableId', 'name', 'data', 'filter'],
+    example: 'n8n_manage_datatable({action: "createTable", name: "Contacts", columns: [{name: "email", type: "string"}]})',
+    performance: 'Fast (100-500ms)',
+    tips: [
+      'Table actions: createTable, listTables, getTable, updateTable, deleteTable',
+      'Row actions: getRows, insertRows, updateRows, upsertRows, deleteRows',
+      'Use dryRun: true to preview update/upsert/delete before applying',
+      'Filter supports: eq, neq, like, ilike, gt, gte, lt, lte conditions',
+      'Use returnData: true to get affected rows back from update/upsert/delete',
+      'Requires n8n enterprise or cloud with data tables feature'
+    ]
+  },
+  full: {
+    description: `**Table Actions:**
+- **createTable**: Create a new data table with optional typed columns
+- **listTables**: List all data tables (paginated)
+- **getTable**: Get table details and column definitions by ID
+- **updateTable**: Rename an existing table
+- **deleteTable**: Permanently delete a table and all its rows
+
+**Row Actions:**
+- **getRows**: List rows with filtering, sorting, search, and pagination
+- **insertRows**: Insert one or more rows (bulk)
+- **updateRows**: Update rows matching a filter condition
+- **upsertRows**: Update matching row or insert if none match
+- **deleteRows**: Delete rows matching a filter condition (filter required)
+
+**Filter System:** Used in getRows, updateRows, upsertRows, deleteRows
+- Combine conditions with "and" (default) or "or"
+- Conditions: eq, neq, like, ilike, gt, gte, lt, lte
+- Example: {type: "and", filters: [{columnName: "status", condition: "eq", value: "active"}]}
+
+**Dry Run:** updateRows, upsertRows, and deleteRows support dryRun: true to preview changes without applying them.`,
+    parameters: {
+      action: { type: 'string', required: true, description: 'Operation to perform' },
+      tableId: { type: 'string', required: false, description: 'Data table ID (required for all except createTable and listTables)' },
+      name: { type: 'string', required: false, description: 'For createTable/updateTable: table name' },
+      columns: { type: 'array', required: false, description: 'For createTable: column definitions [{name, type?}]. Types: string, number, boolean, date, json' },
+      data: { type: 'array|object', required: false, description: 'For insertRows: array of row objects. For updateRows/upsertRows: object with column values' },
+      filter: { type: 'object', required: false, description: 'Filter: {type?: "and"|"or", filters: [{columnName, condition, value}]}' },
+      limit: { type: 'number', required: false, description: 'For listTables/getRows: max results (1-100)' },
+      cursor: { type: 'string', required: false, description: 'For listTables/getRows: pagination cursor' },
+      sortBy: { type: 'string', required: false, description: 'For getRows: "columnName:asc" or "columnName:desc"' },
+      search: { type: 'string', required: false, description: 'For getRows: full-text search across string columns' },
+      returnType: { type: 'string', required: false, description: 'For insertRows: "count" (default), "id", or "all"' },
+      returnData: { type: 'boolean', required: false, description: 'For updateRows/upsertRows/deleteRows: return affected rows (default: false)' },
+      dryRun: { type: 'boolean', required: false, description: 'For updateRows/upsertRows/deleteRows: preview without applying (default: false)' },
+    },
+    returns: `Depends on action:
+- createTable: {id, name}
+- listTables: {tables, count, nextCursor?}
+- getTable: Full table object with columns
+- updateTable: Updated table object
+- deleteTable: Success message
+- getRows: {rows, count, nextCursor?}
+- insertRows: Depends on returnType (count/ids/rows)
+- updateRows: Update result with optional rows
+- upsertRows: Upsert result with action type
+- deleteRows: Delete result with optional rows`,
+    examples: [
+      '// Create a table\nn8n_manage_datatable({action: "createTable", name: "Contacts", columns: [{name: "email", type: "string"}, {name: "score", type: "number"}]})',
+      '// List all tables\nn8n_manage_datatable({action: "listTables"})',
+      '// Get table details\nn8n_manage_datatable({action: "getTable", tableId: "dt-123"})',
+      '// Rename a table\nn8n_manage_datatable({action: "updateTable", tableId: "dt-123", name: "New Name"})',
+      '// Delete a table\nn8n_manage_datatable({action: "deleteTable", tableId: "dt-123"})',
+      '// Get rows with filter\nn8n_manage_datatable({action: "getRows", tableId: "dt-123", filter: {filters: [{columnName: "status", condition: "eq", value: "active"}]}, limit: 50})',
+      '// Search rows\nn8n_manage_datatable({action: "getRows", tableId: "dt-123", search: "john", sortBy: "name:asc"})',
+      '// Insert rows\nn8n_manage_datatable({action: "insertRows", tableId: "dt-123", data: [{email: "a@b.com", score: 10}], returnType: "all"})',
+      '// Update rows (dry run)\nn8n_manage_datatable({action: "updateRows", tableId: "dt-123", filter: {filters: [{columnName: "score", condition: "lt", value: 5}]}, data: {status: "inactive"}, dryRun: true})',
+      '// Upsert a row\nn8n_manage_datatable({action: "upsertRows", tableId: "dt-123", filter: {filters: [{columnName: "email", condition: "eq", value: "a@b.com"}]}, data: {score: 15}, returnData: true})',
+      '// Delete rows\nn8n_manage_datatable({action: "deleteRows", tableId: "dt-123", filter: {filters: [{columnName: "status", condition: "eq", value: "deleted"}]}})',
+    ],
+    useCases: [
+      'Persist structured workflow data across executions',
+      'Store and query lookup tables for workflow logic',
+      'Bulk insert records from external data sources',
+      'Conditionally update records matching criteria',
+      'Upsert to maintain unique records by key column',
+      'Clean up old or invalid rows with filtered delete',
+      'Preview changes with dryRun before modifying data',
+    ],
+    performance: 'Table operations: 50-300ms. Row operations: 100-500ms depending on data size and filters.',
+    bestPractices: [
+      'Define column types upfront for schema consistency',
+      'Use dryRun: true before bulk updates/deletes to verify filter correctness',
+      'Use returnType: "count" (default) for insertRows to minimize response size',
+      'Use filter with specific conditions to avoid unintended bulk operations',
+      'Use cursor-based pagination for large result sets',
+      'Use sortBy for deterministic row ordering',
+    ],
+    pitfalls: [
+      'Requires N8N_API_URL and N8N_API_KEY configured',
+      'Feature only available on n8n enterprise or cloud plans',
+      'deleteTable permanently deletes all rows — cannot be undone',
+      'deleteRows requires a filter — cannot delete all rows without one',
+      'Column types cannot be changed after table creation via API',
+      'updateTable can only rename the table (no column modifications via public API)',
+      'projectId cannot be set via the public API — use the n8n UI',
+    ],
+    relatedTools: ['n8n_create_workflow', 'n8n_list_workflows', 'n8n_health_check'],
+  },
+};

src/mcp/tool-docs/workflow_management/n8n-update-partial-workflow.ts

@@ -4,7 +4,7 @@ export const n8nUpdatePartialWorkflowDoc: ToolDocumentation = {
   name: 'n8n_update_partial_workflow',
   category: 'workflow_management',
   essentials: {
-    description: 'Update workflow incrementally with diff operations. Types: addNode, removeNode, updateNode, moveNode, enable/disableNode, addConnection, removeConnection, rewireConnection, cleanStaleConnections, replaceConnections, updateSettings, updateName, add/removeTag, activateWorkflow, deactivateWorkflow. Supports smart parameters (branch, case) for multi-output nodes. Full support for AI connections (ai_languageModel, ai_tool, ai_memory, ai_embedding, ai_vectorStore, ai_document, ai_textSplitter, ai_outputParser).',
+    description: 'Update workflow incrementally with diff operations. Types: addNode, removeNode, updateNode, moveNode, enable/disableNode, addConnection, removeConnection, rewireConnection, cleanStaleConnections, replaceConnections, updateSettings, updateName, add/removeTag, activateWorkflow, deactivateWorkflow, transferWorkflow. Supports smart parameters (branch, case) for multi-output nodes. Full support for AI connections (ai_languageModel, ai_tool, ai_memory, ai_embedding, ai_vectorStore, ai_document, ai_textSplitter, ai_outputParser).',
     keyParameters: ['id', 'operations', 'continueOnError'],
     example: 'n8n_update_partial_workflow({id: "wf_123", operations: [{type: "rewireConnection", source: "IF", from: "Old", to: "New", branch: "true"}]})',
     performance: 'Fast (50-200ms)',
@@ -22,7 +22,8 @@ export const n8nUpdatePartialWorkflowDoc: ToolDocumentation = {
       'Batch AI component connections for atomic updates',
       'Auto-sanitization: ALL nodes auto-fixed during updates (operator structures, missing metadata)',
       'Node renames automatically update all connection references - no manual connection operations needed',
-      'Activate/deactivate workflows: Use activateWorkflow/deactivateWorkflow operations (requires activatable triggers like webhook/schedule)'
+      'Activate/deactivate workflows: Use activateWorkflow/deactivateWorkflow operations (requires activatable triggers like webhook/schedule)',
+      'Transfer workflows between projects: Use transferWorkflow with destinationProjectId (enterprise feature)'
     ]
   },
   full: {
@@ -55,6 +56,9 @@ export const n8nUpdatePartialWorkflowDoc: ToolDocumentation = {
 - **activateWorkflow**: Activate the workflow to enable automatic execution via triggers
 - **deactivateWorkflow**: Deactivate the workflow to prevent automatic execution
 
+### Project Management Operations (1 type):
+- **transferWorkflow**: Transfer the workflow to a different project. Requires \`destinationProjectId\`. Enterprise/cloud feature.
+
 ## Smart Parameters for Multi-Output Nodes
 
 For **IF nodes**, use semantic 'branch' parameter instead of technical sourceIndex:
@@ -345,7 +349,10 @@ n8n_update_partial_workflow({
       '// Migrate from deprecated continueOnFail to onError\nn8n_update_partial_workflow({id: "rm2", operations: [{type: "updateNode", nodeName: "HTTP Request", updates: {continueOnFail: null, onError: "continueErrorOutput"}}]})',
       '// Remove nested property\nn8n_update_partial_workflow({id: "rm3", operations: [{type: "updateNode", nodeName: "API Request", updates: {"parameters.authentication": null}}]})',
       '// Remove multiple properties\nn8n_update_partial_workflow({id: "rm4", operations: [{type: "updateNode", nodeName: "Data Processor", updates: {continueOnFail: null, alwaysOutputData: null, "parameters.legacy_option": null}}]})',
-      '// Remove entire array property\nn8n_update_partial_workflow({id: "rm5", operations: [{type: "updateNode", nodeName: "HTTP Request", updates: {"parameters.headers": null}}]})'
+      '// Remove entire array property\nn8n_update_partial_workflow({id: "rm5", operations: [{type: "updateNode", nodeName: "HTTP Request", updates: {"parameters.headers": null}}]})',
+      '\n// ============ PROJECT TRANSFER EXAMPLES ============',
+      '// Transfer workflow to a different project\nn8n_update_partial_workflow({id: "tf1", operations: [{type: "transferWorkflow", destinationProjectId: "project-abc-123"}]})',
+      '// Transfer and activate in one call\nn8n_update_partial_workflow({id: "tf2", operations: [{type: "transferWorkflow", destinationProjectId: "project-abc-123"}, {type: "activateWorkflow"}]})'
     ],
     useCases: [
       'Rewire connections when replacing nodes',
@@ -363,7 +370,8 @@ n8n_update_partial_workflow({
       'Add fallback language models to AI Agents',
       'Configure Vector Store retrieval systems',
       'Swap language models in existing AI workflows',
-      'Batch-update AI tool connections'
+      'Batch-update AI tool connections',
+      'Transfer workflows between team projects (enterprise)'
     ],
     performance: 'Very fast - typically 50-200ms. Much faster than full updates as only changes are processed.',
     bestPractices: [

src/mcp/tools-n8n-manager.ts

@@ -63,6 +63,10 @@ export const n8nManagementTools: ToolDefinition[] = [
             executionTimeout: { type: 'number' },
             errorWorkflow: { type: 'string' }
           }
+        },
+        projectId: {
+          type: 'string',
+          description: 'Optional project ID to create the workflow in (enterprise feature)'
         }
       },
       required: ['name', 'nodes', 'connections']
@@ -143,7 +147,7 @@ export const n8nManagementTools: ToolDefinition[] = [
   },
   {
     name: 'n8n_update_partial_workflow',
-    description: `Update workflow incrementally with diff operations. Types: addNode, removeNode, updateNode, moveNode, enable/disableNode, addConnection, removeConnection, updateSettings, updateName, add/removeTag. See tools_documentation("n8n_update_partial_workflow", "full") for details.`,
+    description: `Update workflow incrementally with diff operations. Types: addNode, removeNode, updateNode, moveNode, enable/disableNode, addConnection, removeConnection, updateSettings, updateName, add/removeTag, activate/deactivateWorkflow, transferWorkflow. See tools_documentation("n8n_update_partial_workflow", "full") for details.`,
     inputSchema: {
       type: 'object',
       additionalProperties: true,  // Allow any extra properties Claude Desktop might add
@@ -602,5 +606,52 @@ export const n8nManagementTools: ToolDefinition[] = [
       destructiveHint: false,
       openWorldHint: true,
     },
-  }
+  },
+  {
+    name: 'n8n_manage_datatable',
+    description: `Manage n8n data tables and rows. Actions: createTable, listTables, getTable, updateTable, deleteTable, getRows, insertRows, updateRows, upsertRows, deleteRows. Requires n8n enterprise/cloud with data tables feature.`,
+    inputSchema: {
+      type: 'object',
+      properties: {
+        action: {
+          type: 'string',
+          enum: ['createTable', 'listTables', 'getTable', 'updateTable', 'deleteTable', 'getRows', 'insertRows', 'updateRows', 'upsertRows', 'deleteRows'],
+          description: 'Operation to perform',
+        },
+        tableId: { type: 'string', description: 'Data table ID (required for all actions except createTable and listTables)' },
+        name: { type: 'string', description: 'For createTable/updateTable: table name' },
+        columns: {
+          type: 'array',
+          description: 'For createTable: column definitions',
+          items: {
+            type: 'object',
+            properties: {
+              name: { type: 'string' },
+              type: { type: 'string', enum: ['string', 'number', 'boolean', 'date', 'json'] },
+            },
+            required: ['name'],
+          },
+        },
+        data: { description: 'For insertRows: array of row objects. For updateRows/upsertRows: object with column values.' },
+        filter: {
+          type: 'object',
+          description: 'For getRows/updateRows/upsertRows/deleteRows: {type?: "and"|"or", filters: [{columnName, condition, value}]}',
+        },
+        limit: { type: 'number', description: 'For listTables/getRows: max results (1-100)' },
+        cursor: { type: 'string', description: 'For listTables/getRows: pagination cursor' },
+        sortBy: { type: 'string', description: 'For getRows: "columnName:asc" or "columnName:desc"' },
+        search: { type: 'string', description: 'For getRows: text search across string columns' },
+        returnType: { type: 'string', enum: ['count', 'id', 'all'], description: 'For insertRows: what to return (default: count)' },
+        returnData: { type: 'boolean', description: 'For updateRows/upsertRows/deleteRows: return affected rows (default: false)' },
+        dryRun: { type: 'boolean', description: 'For updateRows/upsertRows/deleteRows: preview without applying (default: false)' },
+      },
+      required: ['action'],
+    },
+    annotations: {
+      title: 'Manage Data Tables',
+      readOnlyHint: false,
+      destructiveHint: true,
+      openWorldHint: true,
+    },
+  },
 ];

src/services/n8n-api-client.ts

@@ -22,6 +22,15 @@ import {
   SourceControlStatus,
   SourceControlPullResult,
   SourceControlPushResult,
+  DataTable,
+  DataTableColumn,
+  DataTableListParams,
+  DataTableRow,
+  DataTableRowListParams,
+  DataTableInsertRowsParams,
+  DataTableUpdateRowsParams,
+  DataTableUpsertRowParams,
+  DataTableDeleteRowsParams,
 } from '../types/n8n-api';
 import { handleN8nApiError, logN8nError } from '../utils/n8n-errors';
 import { cleanWorkflowForCreate, cleanWorkflowForUpdate } from './n8n-validation';
@@ -252,6 +261,14 @@ export class N8nApiClient {
     }
   }
 
+  async transferWorkflow(id: string, destinationProjectId: string): Promise<void> {
+    try {
+      await this.client.put(`/workflows/${id}/transfer`, { destinationProjectId });
+    } catch (error) {
+      throw handleN8nApiError(error);
+    }
+  }
+
   async activateWorkflow(id: string): Promise<Workflow> {
     try {
       const response = await this.client.post(`/workflows/${id}/activate`, {});
@@ -574,6 +591,95 @@ export class N8nApiClient {
     }
   }
 
+  async createDataTable(params: { name: string; columns?: DataTableColumn[] }): Promise<DataTable> {
+    try {
+      const response = await this.client.post('/data-tables', params);
+      return response.data;
+    } catch (error) {
+      throw handleN8nApiError(error);
+    }
+  }
+
+  async listDataTables(params: DataTableListParams = {}): Promise<{ data: DataTable[]; nextCursor?: string | null }> {
+    try {
+      const response = await this.client.get('/data-tables', { params });
+      return this.validateListResponse<DataTable>(response.data, 'data-tables');
+    } catch (error) {
+      throw handleN8nApiError(error);
+    }
+  }
+
+  async getDataTable(id: string): Promise<DataTable> {
+    try {
+      const response = await this.client.get(`/data-tables/${id}`);
+      return response.data;
+    } catch (error) {
+      throw handleN8nApiError(error);
+    }
+  }
+
+  async updateDataTable(id: string, params: { name: string }): Promise<DataTable> {
+    try {
+      const response = await this.client.patch(`/data-tables/${id}`, params);
+      return response.data;
+    } catch (error) {
+      throw handleN8nApiError(error);
+    }
+  }
+
+  async deleteDataTable(id: string): Promise<void> {
+    try {
+      await this.client.delete(`/data-tables/${id}`);
+    } catch (error) {
+      throw handleN8nApiError(error);
+    }
+  }
+
+  async getDataTableRows(id: string, params: DataTableRowListParams = {}): Promise<{ data: DataTableRow[]; nextCursor?: string | null }> {
+    try {
+      const response = await this.client.get(`/data-tables/${id}/rows`, { params });
+      return this.validateListResponse<DataTableRow>(response.data, 'data-table-rows');
+    } catch (error) {
+      throw handleN8nApiError(error);
+    }
+  }
+
+  async insertDataTableRows(id: string, params: DataTableInsertRowsParams): Promise<any> {
+    try {
+      const response = await this.client.post(`/data-tables/${id}/rows`, params);
+      return response.data;
+    } catch (error) {
+      throw handleN8nApiError(error);
+    }
+  }
+
+  async updateDataTableRows(id: string, params: DataTableUpdateRowsParams): Promise<any> {
+    try {
+      const response = await this.client.patch(`/data-tables/${id}/rows/update`, params);
+      return response.data;
+    } catch (error) {
+      throw handleN8nApiError(error);
+    }
+  }
+
+  async upsertDataTableRow(id: string, params: DataTableUpsertRowParams): Promise<any> {
+    try {
+      const response = await this.client.post(`/data-tables/${id}/rows/upsert`, params);
+      return response.data;
+    } catch (error) {
+      throw handleN8nApiError(error);
+    }
+  }
+
+  async deleteDataTableRows(id: string, params: DataTableDeleteRowsParams): Promise<any> {
+    try {
+      const response = await this.client.delete(`/data-tables/${id}/rows/delete`, { params });
+      return response.data;
+    } catch (error) {
+      throw handleN8nApiError(error);
+    }
+  }
+
   /**
    * Validates and normalizes n8n API list responses.
    * Handles both modern format {data: [], nextCursor?: string} and legacy array format.

src/services/workflow-diff-engine.ts

@@ -28,7 +28,8 @@ import {
   ActivateWorkflowOperation,
   DeactivateWorkflowOperation,
   CleanStaleConnectionsOperation,
-  ReplaceConnectionsOperation
+  ReplaceConnectionsOperation,
+  TransferWorkflowOperation
 } from '../types/workflow-diff';
 import { Workflow, WorkflowNode, WorkflowConnection } from '../types/n8n-api';
 import { Logger } from '../utils/logger';
@@ -54,6 +55,8 @@ export class WorkflowDiffEngine {
   // Track tag operations for dedicated API calls
   private tagsToAdd: string[] = [];
   private tagsToRemove: string[] = [];
+  // Track transfer operation for dedicated API call
+  private transferToProjectId: string | undefined;
 
   /**
    * Apply diff operations to a workflow
@@ -70,6 +73,7 @@ export class WorkflowDiffEngine {
       this.removedNodeNames.clear();
       this.tagsToAdd = [];
       this.tagsToRemove = [];
+      this.transferToProjectId = undefined;
 
       // Clone workflow to avoid modifying original
       const workflowCopy = JSON.parse(JSON.stringify(workflow));
@@ -141,6 +145,12 @@ export class WorkflowDiffEngine {
           };
         }
 
+        // Extract and clean up activation flags (same as atomic mode)
+        const shouldActivate = (workflowCopy as any)._shouldActivate === true;
+        const shouldDeactivate = (workflowCopy as any)._shouldDeactivate === true;
+        delete (workflowCopy as any)._shouldActivate;
+        delete (workflowCopy as any)._shouldDeactivate;
+
         const success = appliedIndices.length > 0;
         return {
           success,
@@ -151,8 +161,11 @@ export class WorkflowDiffEngine {
           warnings: this.warnings.length > 0 ? this.warnings : undefined,
           applied: appliedIndices,
           failed: failedIndices,
+          shouldActivate: shouldActivate || undefined,
+          shouldDeactivate: shouldDeactivate || undefined,
           tagsToAdd: this.tagsToAdd.length > 0 ? this.tagsToAdd : undefined,
-          tagsToRemove: this.tagsToRemove.length > 0 ? this.tagsToRemove : undefined
+          tagsToRemove: this.tagsToRemove.length > 0 ? this.tagsToRemove : undefined,
+          transferToProjectId: this.transferToProjectId || undefined
         };
       } else {
         // Atomic mode: all operations must succeed
@@ -256,7 +269,8 @@ export class WorkflowDiffEngine {
           shouldActivate: shouldActivate || undefined,
           shouldDeactivate: shouldDeactivate || undefined,
           tagsToAdd: this.tagsToAdd.length > 0 ? this.tagsToAdd : undefined,
-          tagsToRemove: this.tagsToRemove.length > 0 ? this.tagsToRemove : undefined
+          tagsToRemove: this.tagsToRemove.length > 0 ? this.tagsToRemove : undefined,
+          transferToProjectId: this.transferToProjectId || undefined
         };
       }
     } catch (error) {
@@ -298,6 +312,8 @@ export class WorkflowDiffEngine {
       case 'addTag':
       case 'removeTag':
         return null; // These are always valid
+      case 'transferWorkflow':
+        return this.validateTransferWorkflow(workflow, operation as TransferWorkflowOperation);
       case 'activateWorkflow':
         return this.validateActivateWorkflow(workflow, operation);
       case 'deactivateWorkflow':
@@ -367,6 +383,9 @@ export class WorkflowDiffEngine {
       case 'replaceConnections':
         this.applyReplaceConnections(workflow, operation);
         break;
+      case 'transferWorkflow':
+        this.applyTransferWorkflow(workflow, operation as TransferWorkflowOperation);
+        break;
     }
   }
 
@@ -975,6 +994,18 @@ export class WorkflowDiffEngine {
     (workflow as any)._shouldDeactivate = true;
   }
 
+  // Transfer operation — uses dedicated API call (PUT /workflows/{id}/transfer)
+  private validateTransferWorkflow(_workflow: Workflow, operation: TransferWorkflowOperation): string | null {
+    if (!operation.destinationProjectId) {
+      return 'transferWorkflow requires a non-empty destinationProjectId string';
+    }
+    return null;
+  }
+
+  private applyTransferWorkflow(_workflow: Workflow, operation: TransferWorkflowOperation): void {
+    this.transferToProjectId = operation.destinationProjectId;
+  }
+
   // Connection cleanup operation validators
   private validateCleanStaleConnections(workflow: Workflow, operation: CleanStaleConnectionsOperation): string | null {
     // This operation is always valid - it just cleans up what it finds
@@ -1128,9 +1159,10 @@ export class WorkflowDiffEngine {
             const connection = connectionsAtIndex[connIndex];
             // Check if target node was renamed
             if (renames.has(connection.node)) {
+              const oldTargetName = connection.node;
               const newTargetName = renames.get(connection.node)!;
               connection.node = newTargetName;
-              logger.debug(`Updated connection: ${sourceName}[${outputType}][${outputIndex}][${connIndex}].node: "${connection.node}" → "${newTargetName}"`);
+              logger.debug(`Updated connection: ${sourceName}[${outputType}][${outputIndex}][${connIndex}].node: "${oldTargetName}" → "${newTargetName}"`);
             }
           }
         }

src/types/n8n-api.ts

@@ -454,4 +454,82 @@ export interface ErrorSuggestion {
   title: string;
   description: string;
   confidence: 'high' | 'medium' | 'low';
+}
+
+// Data Table types
+export interface DataTableColumn {
+  name: string;
+  type?: 'string' | 'number' | 'boolean' | 'date' | 'json';
+}
+
+export interface DataTableColumnResponse {
+  id: string;
+  name: string;
+  type: 'string' | 'number' | 'boolean' | 'date' | 'json';
+  index: number;
+}
+
+export interface DataTable {
+  id: string;
+  name: string;
+  columns?: DataTableColumnResponse[];
+  projectId?: string;
+  createdAt?: string;
+  updatedAt?: string;
+}
+
+export interface DataTableRow {
+  id?: number;
+  createdAt?: string;
+  updatedAt?: string;
+  [columnName: string]: unknown;
+}
+
+export interface DataTableFilterCondition {
+  columnName: string;
+  condition: 'eq' | 'neq' | 'like' | 'ilike' | 'gt' | 'gte' | 'lt' | 'lte';
+  value?: any;
+}
+
+export interface DataTableFilter {
+  type?: 'and' | 'or';
+  filters: DataTableFilterCondition[];
+}
+
+export interface DataTableListParams {
+  limit?: number;
+  cursor?: string;
+}
+
+export interface DataTableRowListParams {
+  limit?: number;
+  cursor?: string;
+  filter?: string;
+  sortBy?: string;
+  search?: string;
+}
+
+export interface DataTableInsertRowsParams {
+  data: Record<string, unknown>[];
+  returnType?: 'count' | 'id' | 'all';
+}
+
+export interface DataTableUpdateRowsParams {
+  filter: DataTableFilter;
+  data: Record<string, unknown>;
+  returnData?: boolean;
+  dryRun?: boolean;
+}
+
+export interface DataTableUpsertRowParams {
+  filter: DataTableFilter;
+  data: Record<string, unknown>;
+  returnData?: boolean;
+  dryRun?: boolean;
+}
+
+export interface DataTableDeleteRowsParams {
+  filter: string;
+  returnData?: boolean;
+  dryRun?: boolean;
 }

src/types/workflow-diff.ts

@@ -124,6 +124,11 @@ export interface DeactivateWorkflowOperation extends DiffOperation {
   // No additional properties needed - just deactivates the workflow
 }
 
+export interface TransferWorkflowOperation extends DiffOperation {
+  type: 'transferWorkflow';
+  destinationProjectId: string;
+}
+
 // Connection Cleanup Operations
 export interface CleanStaleConnectionsOperation extends DiffOperation {
   type: 'cleanStaleConnections';
@@ -161,7 +166,8 @@ export type WorkflowDiffOperation =
   | ActivateWorkflowOperation
   | DeactivateWorkflowOperation
   | CleanStaleConnectionsOperation
-  | ReplaceConnectionsOperation;
+  | ReplaceConnectionsOperation
+  | TransferWorkflowOperation;
 
 // Main diff request structure
 export interface WorkflowDiffRequest {
@@ -192,6 +198,7 @@ export interface WorkflowDiffResult {
   shouldDeactivate?: boolean; // Flag to deactivate workflow after update (for deactivateWorkflow operation)
   tagsToAdd?: string[];
   tagsToRemove?: string[];
+  transferToProjectId?: string; // For transferWorkflow operation - uses dedicated API call
 }
 
 // Helper type for node reference (supports both ID and name)

tests/unit/mcp/handlers-manage-datatable.test.ts

@@ -0,0 +1,727 @@
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import { N8nApiClient } from '@/services/n8n-api-client';
+import { N8nApiError } from '@/utils/n8n-errors';
+
+// Mock dependencies
+vi.mock('@/services/n8n-api-client');
+vi.mock('@/config/n8n-api', () => ({
+  getN8nApiConfig: vi.fn(),
+}));
+vi.mock('@/services/n8n-validation', () => ({
+  validateWorkflowStructure: vi.fn(),
+  hasWebhookTrigger: vi.fn(),
+  getWebhookUrl: vi.fn(),
+}));
+vi.mock('@/utils/logger', () => ({
+  logger: {
+    info: vi.fn(),
+    error: vi.fn(),
+    debug: vi.fn(),
+    warn: vi.fn(),
+  },
+  Logger: vi.fn().mockImplementation(() => ({
+    info: vi.fn(),
+    error: vi.fn(),
+    debug: vi.fn(),
+    warn: vi.fn(),
+  })),
+  LogLevel: {
+    ERROR: 0,
+    WARN: 1,
+    INFO: 2,
+    DEBUG: 3,
+  },
+}));
+
+describe('Data Table Handlers (n8n_manage_datatable)', () => {
+  let mockApiClient: any;
+  let handlers: any;
+  let getN8nApiConfig: any;
+
+  beforeEach(async () => {
+    vi.clearAllMocks();
+
+    // Setup mock API client with all data table methods
+    mockApiClient = {
+      createWorkflow: vi.fn(),
+      getWorkflow: vi.fn(),
+      updateWorkflow: vi.fn(),
+      deleteWorkflow: vi.fn(),
+      listWorkflows: vi.fn(),
+      triggerWebhook: vi.fn(),
+      getExecution: vi.fn(),
+      listExecutions: vi.fn(),
+      deleteExecution: vi.fn(),
+      healthCheck: vi.fn(),
+      createDataTable: vi.fn(),
+      listDataTables: vi.fn(),
+      getDataTable: vi.fn(),
+      updateDataTable: vi.fn(),
+      deleteDataTable: vi.fn(),
+      getDataTableRows: vi.fn(),
+      insertDataTableRows: vi.fn(),
+      updateDataTableRows: vi.fn(),
+      upsertDataTableRow: vi.fn(),
+      deleteDataTableRows: vi.fn(),
+    };
+
+    // Import mocked modules
+    getN8nApiConfig = (await import('@/config/n8n-api')).getN8nApiConfig;
+
+    // Mock the API config
+    vi.mocked(getN8nApiConfig).mockReturnValue({
+      baseUrl: 'https://n8n.test.com',
+      apiKey: 'test-key',
+      timeout: 30000,
+      maxRetries: 3,
+    });
+
+    // Mock the N8nApiClient constructor
+    vi.mocked(N8nApiClient).mockImplementation(() => mockApiClient);
+
+    // Import handlers module after setting up mocks
+    handlers = await import('@/mcp/handlers-n8n-manager');
+  });
+
+  afterEach(() => {
+    if (handlers) {
+      const clientGetter = handlers.getN8nApiClient;
+      if (clientGetter) {
+        vi.mocked(getN8nApiConfig).mockReturnValue(null);
+        clientGetter();
+      }
+    }
+  });
+
+  // ========================================================================
+  // handleCreateTable
+  // ========================================================================
+  describe('handleCreateTable', () => {
+    it('should create data table with name and columns successfully', async () => {
+      const createdTable = {
+        id: 'dt-123',
+        name: 'My Data Table',
+        columns: [
+          { id: 'col-1', name: 'email', type: 'string', index: 0 },
+          { id: 'col-2', name: 'age', type: 'number', index: 1 },
+        ],
+      };
+
+      mockApiClient.createDataTable.mockResolvedValue(createdTable);
+
+      const result = await handlers.handleCreateTable({
+        name: 'My Data Table',
+        columns: [
+          { name: 'email', type: 'string' },
+          { name: 'age', type: 'number' },
+        ],
+      });
+
+      expect(result).toEqual({
+        success: true,
+        data: { id: 'dt-123', name: 'My Data Table' },
+        message: 'Data table "My Data Table" created with ID: dt-123',
+      });
+
+      expect(mockApiClient.createDataTable).toHaveBeenCalledWith({
+        name: 'My Data Table',
+        columns: [
+          { name: 'email', type: 'string' },
+          { name: 'age', type: 'number' },
+        ],
+      });
+    });
+
+    it('should create data table with name only (no columns)', async () => {
+      const createdTable = {
+        id: 'dt-456',
+        name: 'Empty Table',
+      };
+
+      mockApiClient.createDataTable.mockResolvedValue(createdTable);
+
+      const result = await handlers.handleCreateTable({
+        name: 'Empty Table',
+      });
+
+      expect(result).toEqual({
+        success: true,
+        data: { id: 'dt-456', name: 'Empty Table' },
+        message: 'Data table "Empty Table" created with ID: dt-456',
+      });
+
+      expect(mockApiClient.createDataTable).toHaveBeenCalledWith({
+        name: 'Empty Table',
+      });
+    });
+
+    it('should return error when API returns empty response (null)', async () => {
+      mockApiClient.createDataTable.mockResolvedValue(null);
+
+      const result = await handlers.handleCreateTable({
+        name: 'Ghost Table',
+      });
+
+      expect(result).toEqual({
+        success: false,
+        error: 'Data table creation failed: n8n API returned an empty or invalid response',
+      });
+    });
+
+    it('should return error when API call fails', async () => {
+      const apiError = new Error('Data table creation failed on the server');
+      mockApiClient.createDataTable.mockRejectedValue(apiError);
+
+      const result = await handlers.handleCreateTable({
+        name: 'Broken Table',
+      });
+
+      expect(result).toEqual({
+        success: false,
+        error: 'Data table creation failed on the server',
+      });
+    });
+
+    it('should return Zod validation error when name is missing', async () => {
+      const result = await handlers.handleCreateTable({});
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBe('Invalid input');
+      expect(result.details).toHaveProperty('errors');
+    });
+
+    it('should return error when n8n API is not configured', async () => {
+      vi.mocked(getN8nApiConfig).mockReturnValue(null);
+
+      const result = await handlers.handleCreateTable({
+        name: 'Test Table',
+      });
+
+      expect(result).toEqual({
+        success: false,
+        error: 'n8n API not configured. Please set N8N_API_URL and N8N_API_KEY environment variables.',
+      });
+    });
+
+    it('should return structured error for N8nApiError', async () => {
+      const apiError = new N8nApiError('Feature not available', 402, 'PAYMENT_REQUIRED', { plan: 'enterprise' });
+      mockApiClient.createDataTable.mockRejectedValue(apiError);
+
+      const result = await handlers.handleCreateTable({
+        name: 'Enterprise Table',
+      });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBeDefined();
+      expect(result.code).toBe('PAYMENT_REQUIRED');
+      expect(result.details).toEqual({ plan: 'enterprise' });
+    });
+
+    it('should return Unknown error when a non-Error value is thrown', async () => {
+      mockApiClient.createDataTable.mockRejectedValue('string-error');
+
+      const result = await handlers.handleCreateTable({
+        name: 'Error Table',
+      });
+
+      expect(result).toEqual({
+        success: false,
+        error: 'Unknown error occurred',
+      });
+    });
+  });
+
+  // ========================================================================
+  // handleListTables
+  // ========================================================================
+  describe('handleListTables', () => {
+    it('should list tables successfully', async () => {
+      const tables = [
+        { id: 'dt-1', name: 'Table One' },
+        { id: 'dt-2', name: 'Table Two' },
+      ];
+      mockApiClient.listDataTables.mockResolvedValue({ data: tables, nextCursor: null });
+
+      const result = await handlers.handleListTables({});
+
+      expect(result).toEqual({
+        success: true,
+        data: {
+          tables,
+          count: 2,
+          nextCursor: undefined,
+        },
+      });
+    });
+
+    it('should return empty list when no tables exist', async () => {
+      mockApiClient.listDataTables.mockResolvedValue({ data: [], nextCursor: null });
+
+      const result = await handlers.handleListTables({});
+
+      expect(result).toEqual({
+        success: true,
+        data: {
+          tables: [],
+          count: 0,
+          nextCursor: undefined,
+        },
+      });
+    });
+
+    it('should pass pagination params (limit, cursor)', async () => {
+      mockApiClient.listDataTables.mockResolvedValue({
+        data: [{ id: 'dt-3', name: 'Page Two' }],
+        nextCursor: 'cursor-next',
+      });
+
+      const result = await handlers.handleListTables({ limit: 10, cursor: 'cursor-abc' });
+
+      expect(mockApiClient.listDataTables).toHaveBeenCalledWith({ limit: 10, cursor: 'cursor-abc' });
+      expect(result.success).toBe(true);
+      expect(result.data.nextCursor).toBe('cursor-next');
+    });
+
+    it('should handle API error', async () => {
+      mockApiClient.listDataTables.mockRejectedValue(new Error('Server down'));
+
+      const result = await handlers.handleListTables({});
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBe('Server down');
+    });
+  });
+
+  // ========================================================================
+  // handleGetTable
+  // ========================================================================
+  describe('handleGetTable', () => {
+    it('should get table successfully', async () => {
+      const table = { id: 'dt-1', name: 'My Table', columns: [] };
+      mockApiClient.getDataTable.mockResolvedValue(table);
+
+      const result = await handlers.handleGetTable({ tableId: 'dt-1' });
+
+      expect(result).toEqual({
+        success: true,
+        data: table,
+      });
+      expect(mockApiClient.getDataTable).toHaveBeenCalledWith('dt-1');
+    });
+
+    it('should return error on 404', async () => {
+      const notFoundError = new N8nApiError('Data table not found', 404, 'NOT_FOUND');
+      mockApiClient.getDataTable.mockRejectedValue(notFoundError);
+
+      const result = await handlers.handleGetTable({ tableId: 'dt-nonexistent' });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBeDefined();
+      expect(result.code).toBe('NOT_FOUND');
+    });
+
+    it('should return Zod validation error when tableId is missing', async () => {
+      const result = await handlers.handleGetTable({});
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBe('Invalid input');
+      expect(result.details).toHaveProperty('errors');
+    });
+  });
+
+  // ========================================================================
+  // handleUpdateTable
+  // ========================================================================
+  describe('handleUpdateTable', () => {
+    it('should rename table successfully', async () => {
+      const updatedTable = { id: 'dt-1', name: 'Renamed Table' };
+      mockApiClient.updateDataTable.mockResolvedValue(updatedTable);
+
+      const result = await handlers.handleUpdateTable({ tableId: 'dt-1', name: 'Renamed Table' });
+
+      expect(result).toEqual({
+        success: true,
+        data: updatedTable,
+        message: 'Data table renamed to "Renamed Table"',
+      });
+      expect(mockApiClient.updateDataTable).toHaveBeenCalledWith('dt-1', { name: 'Renamed Table' });
+    });
+
+    it('should return Zod validation error when tableId is missing', async () => {
+      const result = await handlers.handleUpdateTable({ name: 'New Name' });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBe('Invalid input');
+      expect(result.details).toHaveProperty('errors');
+    });
+
+    it('should return error when API call fails', async () => {
+      mockApiClient.updateDataTable.mockRejectedValue(new Error('Update failed'));
+
+      const result = await handlers.handleUpdateTable({ tableId: 'dt-1', name: 'New Name' });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBe('Update failed');
+    });
+  });
+
+  // ========================================================================
+  // handleDeleteTable
+  // ========================================================================
+  describe('handleDeleteTable', () => {
+    it('should delete table successfully', async () => {
+      mockApiClient.deleteDataTable.mockResolvedValue(undefined);
+
+      const result = await handlers.handleDeleteTable({ tableId: 'dt-1' });
+
+      expect(result).toEqual({
+        success: true,
+        message: 'Data table dt-1 deleted successfully',
+      });
+      expect(mockApiClient.deleteDataTable).toHaveBeenCalledWith('dt-1');
+    });
+
+    it('should return error on 404', async () => {
+      const notFoundError = new N8nApiError('Data table not found', 404, 'NOT_FOUND');
+      mockApiClient.deleteDataTable.mockRejectedValue(notFoundError);
+
+      const result = await handlers.handleDeleteTable({ tableId: 'dt-nonexistent' });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBeDefined();
+      expect(result.code).toBe('NOT_FOUND');
+    });
+  });
+
+  // ========================================================================
+  // handleGetRows
+  // ========================================================================
+  describe('handleGetRows', () => {
+    it('should get rows with default params', async () => {
+      const rows = [
+        { id: 1, email: 'a@b.com', score: 10 },
+        { id: 2, email: 'c@d.com', score: 20 },
+      ];
+      mockApiClient.getDataTableRows.mockResolvedValue({ data: rows, nextCursor: null });
+
+      const result = await handlers.handleGetRows({ tableId: 'dt-1' });
+
+      expect(result).toEqual({
+        success: true,
+        data: {
+          rows,
+          count: 2,
+          nextCursor: undefined,
+        },
+      });
+      expect(mockApiClient.getDataTableRows).toHaveBeenCalledWith('dt-1', {});
+    });
+
+    it('should pass filter, sort, and search params', async () => {
+      mockApiClient.getDataTableRows.mockResolvedValue({ data: [], nextCursor: null });
+
+      await handlers.handleGetRows({
+        tableId: 'dt-1',
+        limit: 50,
+        sortBy: 'name:asc',
+        search: 'john',
+      });
+
+      expect(mockApiClient.getDataTableRows).toHaveBeenCalledWith('dt-1', {
+        limit: 50,
+        sortBy: 'name:asc',
+        search: 'john',
+      });
+    });
+
+    it('should serialize object filter to JSON string', async () => {
+      mockApiClient.getDataTableRows.mockResolvedValue({ data: [], nextCursor: null });
+
+      const objectFilter = {
+        type: 'and' as const,
+        filters: [{ columnName: 'status', condition: 'eq' as const, value: 'active' }],
+      };
+
+      await handlers.handleGetRows({
+        tableId: 'dt-1',
+        filter: objectFilter,
+      });
+
+      expect(mockApiClient.getDataTableRows).toHaveBeenCalledWith('dt-1', {
+        filter: JSON.stringify(objectFilter),
+      });
+    });
+
+    it('should pass through string filter as-is', async () => {
+      mockApiClient.getDataTableRows.mockResolvedValue({ data: [], nextCursor: null });
+
+      await handlers.handleGetRows({
+        tableId: 'dt-1',
+        filter: '{"type":"and","filters":[]}',
+      });
+
+      expect(mockApiClient.getDataTableRows).toHaveBeenCalledWith('dt-1', {
+        filter: '{"type":"and","filters":[]}',
+      });
+    });
+  });
+
+  // ========================================================================
+  // handleInsertRows
+  // ========================================================================
+  describe('handleInsertRows', () => {
+    it('should insert rows successfully', async () => {
+      const insertResult = { insertedCount: 2, ids: [1, 2] };
+      mockApiClient.insertDataTableRows.mockResolvedValue(insertResult);
+
+      const result = await handlers.handleInsertRows({
+        tableId: 'dt-1',
+        data: [
+          { email: 'a@b.com', score: 10 },
+          { email: 'c@d.com', score: 20 },
+        ],
+      });
+
+      expect(result).toEqual({
+        success: true,
+        data: insertResult,
+        message: 'Rows inserted into data table dt-1',
+      });
+      expect(mockApiClient.insertDataTableRows).toHaveBeenCalledWith('dt-1', {
+        data: [
+          { email: 'a@b.com', score: 10 },
+          { email: 'c@d.com', score: 20 },
+        ],
+      });
+    });
+
+    it('should pass returnType to the API client', async () => {
+      const insertResult = [{ id: 1, email: 'a@b.com', score: 10 }];
+      mockApiClient.insertDataTableRows.mockResolvedValue(insertResult);
+
+      const result = await handlers.handleInsertRows({
+        tableId: 'dt-1',
+        data: [{ email: 'a@b.com', score: 10 }],
+        returnType: 'all',
+      });
+
+      expect(result.success).toBe(true);
+      expect(result.data).toEqual(insertResult);
+      expect(mockApiClient.insertDataTableRows).toHaveBeenCalledWith('dt-1', {
+        data: [{ email: 'a@b.com', score: 10 }],
+        returnType: 'all',
+      });
+    });
+
+    it('should return Zod validation error when data is empty array', async () => {
+      const result = await handlers.handleInsertRows({
+        tableId: 'dt-1',
+        data: [],
+      });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBe('Invalid input');
+      expect(result.details).toHaveProperty('errors');
+    });
+  });
+
+  // ========================================================================
+  // handleUpdateRows
+  // ========================================================================
+  describe('handleUpdateRows', () => {
+    it('should update rows successfully', async () => {
+      const updateResult = { updatedCount: 3 };
+      mockApiClient.updateDataTableRows.mockResolvedValue(updateResult);
+
+      const filter = {
+        type: 'and' as const,
+        filters: [{ columnName: 'status', condition: 'eq' as const, value: 'inactive' }],
+      };
+
+      const result = await handlers.handleUpdateRows({
+        tableId: 'dt-1',
+        filter,
+        data: { status: 'active' },
+      });
+
+      expect(result).toEqual({
+        success: true,
+        data: updateResult,
+        message: 'Rows updated successfully',
+      });
+      expect(mockApiClient.updateDataTableRows).toHaveBeenCalledWith('dt-1', {
+        filter,
+        data: { status: 'active' },
+      });
+    });
+
+    it('should support dryRun mode', async () => {
+      const dryRunResult = { matchedCount: 5 };
+      mockApiClient.updateDataTableRows.mockResolvedValue(dryRunResult);
+
+      const filter = {
+        filters: [{ columnName: 'score', condition: 'lt' as const, value: 5 }],
+      };
+
+      const result = await handlers.handleUpdateRows({
+        tableId: 'dt-1',
+        filter,
+        data: { status: 'low' },
+        dryRun: true,
+      });
+
+      expect(result.success).toBe(true);
+      expect(result.message).toBe('Dry run: rows matched (no changes applied)');
+      expect(mockApiClient.updateDataTableRows).toHaveBeenCalledWith('dt-1', {
+        filter: { type: 'and', ...filter },
+        data: { status: 'low' },
+        dryRun: true,
+      });
+    });
+
+    it('should return error on API failure', async () => {
+      mockApiClient.updateDataTableRows.mockRejectedValue(new Error('Conflict'));
+
+      const result = await handlers.handleUpdateRows({
+        tableId: 'dt-1',
+        filter: { filters: [{ columnName: 'id', condition: 'eq' as const, value: 1 }] },
+        data: { name: 'test' },
+      });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBe('Conflict');
+    });
+  });
+
+  // ========================================================================
+  // handleUpsertRows
+  // ========================================================================
+  describe('handleUpsertRows', () => {
+    it('should upsert row successfully', async () => {
+      const upsertResult = { action: 'updated', row: { id: 1, email: 'a@b.com', score: 15 } };
+      mockApiClient.upsertDataTableRow.mockResolvedValue(upsertResult);
+
+      const filter = {
+        filters: [{ columnName: 'email', condition: 'eq' as const, value: 'a@b.com' }],
+      };
+
+      const result = await handlers.handleUpsertRows({
+        tableId: 'dt-1',
+        filter,
+        data: { score: 15 },
+      });
+
+      expect(result).toEqual({
+        success: true,
+        data: upsertResult,
+        message: 'Row upserted successfully',
+      });
+      expect(mockApiClient.upsertDataTableRow).toHaveBeenCalledWith('dt-1', {
+        filter: { type: 'and', ...filter },
+        data: { score: 15 },
+      });
+    });
+
+    it('should support dryRun mode', async () => {
+      const dryRunResult = { action: 'would_update', matchedRows: 1 };
+      mockApiClient.upsertDataTableRow.mockResolvedValue(dryRunResult);
+
+      const filter = {
+        filters: [{ columnName: 'email', condition: 'eq' as const, value: 'a@b.com' }],
+      };
+
+      const result = await handlers.handleUpsertRows({
+        tableId: 'dt-1',
+        filter,
+        data: { score: 20 },
+        dryRun: true,
+      });
+
+      expect(result.success).toBe(true);
+      expect(result.message).toBe('Dry run: upsert previewed (no changes applied)');
+    });
+
+    it('should return error on API failure', async () => {
+      const apiError = new N8nApiError('Server error', 500, 'INTERNAL_ERROR');
+      mockApiClient.upsertDataTableRow.mockRejectedValue(apiError);
+
+      const result = await handlers.handleUpsertRows({
+        tableId: 'dt-1',
+        filter: { filters: [{ columnName: 'id', condition: 'eq' as const, value: 1 }] },
+        data: { name: 'test' },
+      });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBeDefined();
+      expect(result.code).toBe('INTERNAL_ERROR');
+    });
+  });
+
+  // ========================================================================
+  // handleDeleteRows
+  // ========================================================================
+  describe('handleDeleteRows', () => {
+    it('should delete rows successfully', async () => {
+      const deleteResult = { deletedCount: 2 };
+      mockApiClient.deleteDataTableRows.mockResolvedValue(deleteResult);
+
+      const filter = {
+        filters: [{ columnName: 'status', condition: 'eq' as const, value: 'deleted' }],
+      };
+
+      const result = await handlers.handleDeleteRows({
+        tableId: 'dt-1',
+        filter,
+      });
+
+      expect(result).toEqual({
+        success: true,
+        data: deleteResult,
+        message: 'Rows deleted successfully',
+      });
+      expect(mockApiClient.deleteDataTableRows).toHaveBeenCalledWith('dt-1', {
+        filter: JSON.stringify({ type: 'and', ...filter }),
+      });
+    });
+
+    it('should serialize filter object to JSON string for API call', async () => {
+      mockApiClient.deleteDataTableRows.mockResolvedValue({ deletedCount: 1 });
+
+      const filter = {
+        type: 'or' as const,
+        filters: [
+          { columnName: 'score', condition: 'lt' as const, value: 0 },
+          { columnName: 'status', condition: 'eq' as const, value: 'spam' },
+        ],
+      };
+
+      await handlers.handleDeleteRows({ tableId: 'dt-1', filter });
+
+      expect(mockApiClient.deleteDataTableRows).toHaveBeenCalledWith('dt-1', {
+        filter: JSON.stringify(filter),
+      });
+    });
+
+    it('should support dryRun mode', async () => {
+      const dryRunResult = { matchedCount: 4 };
+      mockApiClient.deleteDataTableRows.mockResolvedValue(dryRunResult);
+
+      const filter = {
+        filters: [{ columnName: 'active', condition: 'eq' as const, value: false }],
+      };
+
+      const result = await handlers.handleDeleteRows({
+        tableId: 'dt-1',
+        filter,
+        dryRun: true,
+      });
+
+      expect(result.success).toBe(true);
+      expect(result.message).toBe('Dry run: rows matched for deletion (no changes applied)');
+      expect(mockApiClient.deleteDataTableRows).toHaveBeenCalledWith('dt-1', {
+        filter: JSON.stringify({ type: 'and', ...filter }),
+        dryRun: true,
+      });
+    });
+  });
+});

tests/unit/mcp/handlers-n8n-manager.test.ts

@@ -631,6 +631,27 @@ describe('handlers-n8n-manager', () => {
         expect(result.details.errors[0]).toContain('Webhook');
       });
     });
+
+    it('should pass projectId to API when provided', async () => {
+      const testWorkflow = createTestWorkflow();
+      const input = {
+        name: 'Test Workflow',
+        nodes: testWorkflow.nodes,
+        connections: testWorkflow.connections,
+        projectId: 'project-abc-123',
+      };
+
+      mockApiClient.createWorkflow.mockResolvedValue(testWorkflow);
+
+      const result = await handlers.handleCreateWorkflow(input);
+
+      expect(result.success).toBe(true);
+      expect(mockApiClient.createWorkflow).toHaveBeenCalledWith(
+        expect.objectContaining({
+          projectId: 'project-abc-123',
+        })
+      );
+    });
   });
 
   describe('handleGetWorkflow', () => {
@@ -1081,10 +1102,10 @@ describe('handlers-n8n-manager', () => {
             enabled: true,
           },
           managementTools: {
-            count: 13,
+            count: 14,
             enabled: true,
           },
-          totalAvailable: 20,
+          totalAvailable: 21,
         },
       });
 

tests/unit/mcp/handlers-workflow-diff.test.ts

@@ -76,6 +76,7 @@ describe('handlers-workflow-diff', () => {
       listTags: vi.fn().mockResolvedValue({ data: [] }),
       createTag: vi.fn(),
       updateWorkflowTags: vi.fn().mockResolvedValue([]),
+      transferWorkflow: vi.fn().mockResolvedValue(undefined),
     };
 
     // Setup mock diff engine
@@ -1002,6 +1003,186 @@ describe('handlers-workflow-diff', () => {
       });
     });
 
+    describe('Project Transfer via Dedicated API', () => {
+      it('should call transferWorkflow when diffResult has transferToProjectId', async () => {
+        const testWorkflow = createTestWorkflow();
+        const updatedWorkflow = { ...testWorkflow };
+
+        mockApiClient.getWorkflow.mockResolvedValue(testWorkflow);
+        mockDiffEngine.applyDiff.mockResolvedValue({
+          success: true,
+          workflow: updatedWorkflow,
+          operationsApplied: 1,
+          message: 'Success',
+          errors: [],
+          transferToProjectId: 'project-abc-123',
+        });
+        mockApiClient.updateWorkflow.mockResolvedValue(updatedWorkflow);
+
+        const result = await handleUpdatePartialWorkflow({
+          id: 'test-workflow-id',
+          operations: [{ type: 'transferWorkflow', destinationProjectId: 'project-abc-123' }],
+        }, mockRepository);
+
+        expect(result.success).toBe(true);
+        expect(mockApiClient.transferWorkflow).toHaveBeenCalledWith('test-workflow-id', 'project-abc-123');
+        expect(result.message).toContain('transferred to project');
+      });
+
+      it('should NOT call transferWorkflow when transferToProjectId is absent', async () => {
+        const testWorkflow = createTestWorkflow();
+        const updatedWorkflow = { ...testWorkflow };
+
+        mockApiClient.getWorkflow.mockResolvedValue(testWorkflow);
+        mockDiffEngine.applyDiff.mockResolvedValue({
+          success: true,
+          workflow: updatedWorkflow,
+          operationsApplied: 1,
+          message: 'Success',
+          errors: [],
+        });
+        mockApiClient.updateWorkflow.mockResolvedValue(updatedWorkflow);
+
+        await handleUpdatePartialWorkflow({
+          id: 'test-workflow-id',
+          operations: [{ type: 'updateName', name: 'New Name' }],
+        }, mockRepository);
+
+        expect(mockApiClient.transferWorkflow).not.toHaveBeenCalled();
+      });
+
+      it('should return success false with saved true when transfer fails', async () => {
+        const testWorkflow = createTestWorkflow();
+        const updatedWorkflow = { ...testWorkflow };
+
+        mockApiClient.getWorkflow.mockResolvedValue(testWorkflow);
+        mockDiffEngine.applyDiff.mockResolvedValue({
+          success: true,
+          workflow: updatedWorkflow,
+          operationsApplied: 1,
+          message: 'Success',
+          errors: [],
+          transferToProjectId: 'project-bad-id',
+        });
+        mockApiClient.updateWorkflow.mockResolvedValue(updatedWorkflow);
+        mockApiClient.transferWorkflow.mockRejectedValue(new Error('Project not found'));
+
+        const result = await handleUpdatePartialWorkflow({
+          id: 'test-workflow-id',
+          operations: [{ type: 'transferWorkflow', destinationProjectId: 'project-bad-id' }],
+        }, mockRepository);
+
+        expect(result.success).toBe(false);
+        expect(result.saved).toBe(true);
+        expect(result.error).toBe('Workflow updated successfully but project transfer failed');
+        expect(result.details).toEqual({
+          workflowUpdated: true,
+          transferError: 'Project not found',
+        });
+      });
+
+      it('should return Unknown error when non-Error value is thrown during transfer', async () => {
+        const testWorkflow = createTestWorkflow();
+        const updatedWorkflow = { ...testWorkflow };
+
+        mockApiClient.getWorkflow.mockResolvedValue(testWorkflow);
+        mockDiffEngine.applyDiff.mockResolvedValue({
+          success: true,
+          workflow: updatedWorkflow,
+          operationsApplied: 1,
+          message: 'Success',
+          errors: [],
+          transferToProjectId: 'project-unknown',
+        });
+        mockApiClient.updateWorkflow.mockResolvedValue(updatedWorkflow);
+        mockApiClient.transferWorkflow.mockRejectedValue('string error');
+
+        const result = await handleUpdatePartialWorkflow({
+          id: 'test-workflow-id',
+          operations: [{ type: 'transferWorkflow', destinationProjectId: 'project-unknown' }],
+        }, mockRepository);
+
+        expect(result.success).toBe(false);
+        expect(result.saved).toBe(true);
+        expect(result.details).toEqual({
+          workflowUpdated: true,
+          transferError: 'Unknown error',
+        });
+      });
+
+      it('should call transferWorkflow BEFORE activateWorkflow', async () => {
+        const testWorkflow = createTestWorkflow({ active: false });
+        const updatedWorkflow = { ...testWorkflow, active: false };
+        const activatedWorkflow = { ...testWorkflow, active: true };
+
+        const callOrder: string[] = [];
+
+        mockApiClient.getWorkflow.mockResolvedValue(testWorkflow);
+        mockDiffEngine.applyDiff.mockResolvedValue({
+          success: true,
+          workflow: updatedWorkflow,
+          operationsApplied: 2,
+          message: 'Success',
+          errors: [],
+          transferToProjectId: 'project-target',
+          shouldActivate: true,
+        });
+        mockApiClient.updateWorkflow.mockResolvedValue(updatedWorkflow);
+        mockApiClient.transferWorkflow.mockImplementation(async () => {
+          callOrder.push('transfer');
+        });
+        mockApiClient.activateWorkflow = vi.fn().mockImplementation(async () => {
+          callOrder.push('activate');
+          return activatedWorkflow;
+        });
+
+        const result = await handleUpdatePartialWorkflow({
+          id: 'test-workflow-id',
+          operations: [
+            { type: 'transferWorkflow', destinationProjectId: 'project-target' },
+            { type: 'activateWorkflow' },
+          ],
+        }, mockRepository);
+
+        expect(result.success).toBe(true);
+        expect(mockApiClient.transferWorkflow).toHaveBeenCalledWith('test-workflow-id', 'project-target');
+        expect(mockApiClient.activateWorkflow).toHaveBeenCalledWith('test-workflow-id');
+        expect(callOrder).toEqual(['transfer', 'activate']);
+      });
+
+      it('should skip activation when transfer fails', async () => {
+        const testWorkflow = createTestWorkflow({ active: false });
+        const updatedWorkflow = { ...testWorkflow, active: false };
+
+        mockApiClient.getWorkflow.mockResolvedValue(testWorkflow);
+        mockDiffEngine.applyDiff.mockResolvedValue({
+          success: true,
+          workflow: updatedWorkflow,
+          operationsApplied: 2,
+          message: 'Success',
+          errors: [],
+          transferToProjectId: 'project-fail',
+          shouldActivate: true,
+        });
+        mockApiClient.updateWorkflow.mockResolvedValue(updatedWorkflow);
+        mockApiClient.transferWorkflow.mockRejectedValue(new Error('Transfer denied'));
+        mockApiClient.activateWorkflow = vi.fn();
+
+        const result = await handleUpdatePartialWorkflow({
+          id: 'test-workflow-id',
+          operations: [
+            { type: 'transferWorkflow', destinationProjectId: 'project-fail' },
+            { type: 'activateWorkflow' },
+          ],
+        }, mockRepository);
+
+        expect(result.success).toBe(false);
+        expect(result.saved).toBe(true);
+        expect(result.error).toBe('Workflow updated successfully but project transfer failed');
+        expect(mockApiClient.activateWorkflow).not.toHaveBeenCalled();
+      });
+    });
+
     describe('field name normalization', () => {
       it('should normalize "name" to "nodeName" for updateNode operations', async () => {
         const testWorkflow = createTestWorkflow();
@@ -1119,4 +1300,4 @@ describe('handlers-workflow-diff', () => {
       });
     });
   });
-});
+});

tests/unit/mcp/parameter-validation.test.ts

@@ -542,6 +542,9 @@ describe('Parameter Validation', () => {
       await expect(server.testExecuteTool('n8n_test_workflow', {}))
         .rejects.toThrow('Missing required parameters for n8n_test_workflow: workflowId');
 
+      await expect(server.testExecuteTool('n8n_manage_datatable', {}))
+        .rejects.toThrow('n8n_manage_datatable: Validation failed:\n  • action: action is required');
+
       for (const tool of n8nToolsWithRequiredParams) {
         await expect(server.testExecuteTool(tool.name, tool.args))
           .rejects.toThrow(tool.expected);

tests/unit/services/n8n-api-client.test.ts

@@ -1250,6 +1250,413 @@ describe('N8nApiClient', () => {
     });
   });
 
+  describe('transferWorkflow', () => {
+    beforeEach(() => {
+      client = new N8nApiClient(defaultConfig);
+    });
+
+    it('should transfer workflow successfully via PUT', async () => {
+      mockAxiosInstance.put.mockResolvedValue({ data: undefined });
+
+      await client.transferWorkflow('123', 'project-456');
+
+      expect(mockAxiosInstance.put).toHaveBeenCalledWith(
+        '/workflows/123/transfer',
+        { destinationProjectId: 'project-456' }
+      );
+    });
+
+    it('should throw N8nNotFoundError on 404', async () => {
+      const error = {
+        message: 'Request failed',
+        response: { status: 404, data: { message: 'Workflow not found' } }
+      };
+      await mockAxiosInstance.simulateError('put', error);
+
+      try {
+        await client.transferWorkflow('123', 'project-456');
+        expect.fail('Should have thrown an error');
+      } catch (err) {
+        expect(err).toBeInstanceOf(N8nNotFoundError);
+        expect((err as N8nNotFoundError).message).toContain('not found');
+        expect((err as N8nNotFoundError).statusCode).toBe(404);
+      }
+    });
+
+    it('should throw appropriate error on 403 forbidden', async () => {
+      const error = {
+        message: 'Request failed',
+        response: { status: 403, data: { message: 'Forbidden' } }
+      };
+      await mockAxiosInstance.simulateError('put', error);
+
+      try {
+        await client.transferWorkflow('123', 'project-456');
+        expect.fail('Should have thrown an error');
+      } catch (err) {
+        expect(err).toBeInstanceOf(N8nApiError);
+        expect((err as N8nApiError).statusCode).toBe(403);
+      }
+    });
+  });
+
+  describe('createDataTable', () => {
+    beforeEach(() => {
+      client = new N8nApiClient(defaultConfig);
+    });
+
+    it('should create data table with name and columns', async () => {
+      const params = {
+        name: 'My Table',
+        columns: [
+          { name: 'email', type: 'string' as const },
+          { name: 'count', type: 'number' as const },
+        ],
+      };
+      const createdTable = { id: 'dt-1', name: 'My Table', columns: [] };
+
+      mockAxiosInstance.post.mockResolvedValue({ data: createdTable });
+
+      const result = await client.createDataTable(params);
+
+      expect(mockAxiosInstance.post).toHaveBeenCalledWith('/data-tables', params);
+      expect(result).toEqual(createdTable);
+    });
+
+    it('should create data table without columns', async () => {
+      const params = { name: 'Empty Table' };
+      const createdTable = { id: 'dt-2', name: 'Empty Table' };
+
+      mockAxiosInstance.post.mockResolvedValue({ data: createdTable });
+
+      const result = await client.createDataTable(params);
+
+      expect(mockAxiosInstance.post).toHaveBeenCalledWith('/data-tables', params);
+      expect(result).toEqual(createdTable);
+    });
+
+    it('should handle 400 error', async () => {
+      const error = {
+        message: 'Request failed',
+        response: { status: 400, data: { message: 'Invalid table name' } },
+      };
+      await mockAxiosInstance.simulateError('post', error);
+
+      try {
+        await client.createDataTable({ name: '' });
+        expect.fail('Should have thrown an error');
+      } catch (err) {
+        expect(err).toBeInstanceOf(N8nValidationError);
+        expect((err as N8nValidationError).message).toBe('Invalid table name');
+        expect((err as N8nValidationError).statusCode).toBe(400);
+      }
+    });
+  });
+
+  describe('listDataTables', () => {
+    beforeEach(() => {
+      client = new N8nApiClient(defaultConfig);
+    });
+
+    it('should list data tables successfully', async () => {
+      const response = { data: [{ id: 'dt-1', name: 'Table One' }], nextCursor: 'abc' };
+      mockAxiosInstance.get.mockResolvedValue({ data: response });
+
+      const result = await client.listDataTables({ limit: 10, cursor: 'xyz' });
+
+      expect(mockAxiosInstance.get).toHaveBeenCalledWith('/data-tables', { params: { limit: 10, cursor: 'xyz' } });
+      expect(result).toEqual(response);
+    });
+
+    it('should handle error', async () => {
+      const error = {
+        message: 'Request failed',
+        response: { status: 500, data: { message: 'Internal server error' } },
+      };
+      await mockAxiosInstance.simulateError('get', error);
+
+      try {
+        await client.listDataTables();
+        expect.fail('Should have thrown an error');
+      } catch (err) {
+        expect(err).toBeInstanceOf(N8nServerError);
+        expect((err as N8nServerError).statusCode).toBe(500);
+      }
+    });
+  });
+
+  describe('getDataTable', () => {
+    beforeEach(() => {
+      client = new N8nApiClient(defaultConfig);
+    });
+
+    it('should get data table successfully', async () => {
+      const table = { id: 'dt-1', name: 'My Table', columns: [] };
+      mockAxiosInstance.get.mockResolvedValue({ data: table });
+
+      const result = await client.getDataTable('dt-1');
+
+      expect(mockAxiosInstance.get).toHaveBeenCalledWith('/data-tables/dt-1');
+      expect(result).toEqual(table);
+    });
+
+    it('should handle 404 error', async () => {
+      const error = {
+        message: 'Request failed',
+        response: { status: 404, data: { message: 'Data table not found' } },
+      };
+      await mockAxiosInstance.simulateError('get', error);
+
+      try {
+        await client.getDataTable('dt-nonexistent');
+        expect.fail('Should have thrown an error');
+      } catch (err) {
+        expect(err).toBeInstanceOf(N8nNotFoundError);
+        expect((err as N8nNotFoundError).statusCode).toBe(404);
+      }
+    });
+  });
+
+  describe('updateDataTable', () => {
+    beforeEach(() => {
+      client = new N8nApiClient(defaultConfig);
+    });
+
+    it('should update data table successfully', async () => {
+      const updated = { id: 'dt-1', name: 'Renamed' };
+      mockAxiosInstance.patch.mockResolvedValue({ data: updated });
+
+      const result = await client.updateDataTable('dt-1', { name: 'Renamed' });
+
+      expect(mockAxiosInstance.patch).toHaveBeenCalledWith('/data-tables/dt-1', { name: 'Renamed' });
+      expect(result).toEqual(updated);
+    });
+
+    it('should handle error', async () => {
+      const error = {
+        message: 'Request failed',
+        response: { status: 400, data: { message: 'Invalid name' } },
+      };
+      await mockAxiosInstance.simulateError('patch', error);
+
+      try {
+        await client.updateDataTable('dt-1', { name: '' });
+        expect.fail('Should have thrown an error');
+      } catch (err) {
+        expect(err).toBeInstanceOf(N8nValidationError);
+        expect((err as N8nValidationError).statusCode).toBe(400);
+      }
+    });
+  });
+
+  describe('deleteDataTable', () => {
+    beforeEach(() => {
+      client = new N8nApiClient(defaultConfig);
+    });
+
+    it('should delete data table successfully', async () => {
+      mockAxiosInstance.delete.mockResolvedValue({ data: {} });
+
+      await client.deleteDataTable('dt-1');
+
+      expect(mockAxiosInstance.delete).toHaveBeenCalledWith('/data-tables/dt-1');
+    });
+
+    it('should handle 404 error', async () => {
+      const error = {
+        message: 'Request failed',
+        response: { status: 404, data: { message: 'Data table not found' } },
+      };
+      await mockAxiosInstance.simulateError('delete', error);
+
+      try {
+        await client.deleteDataTable('dt-nonexistent');
+        expect.fail('Should have thrown an error');
+      } catch (err) {
+        expect(err).toBeInstanceOf(N8nNotFoundError);
+        expect((err as N8nNotFoundError).statusCode).toBe(404);
+      }
+    });
+  });
+
+  describe('getDataTableRows', () => {
+    beforeEach(() => {
+      client = new N8nApiClient(defaultConfig);
+    });
+
+    it('should get data table rows with params', async () => {
+      const response = { data: [{ id: 1, email: 'a@b.com' }], nextCursor: null };
+      mockAxiosInstance.get.mockResolvedValue({ data: response });
+
+      const params = { limit: 50, sortBy: 'email:asc', search: 'john' };
+      const result = await client.getDataTableRows('dt-1', params);
+
+      expect(mockAxiosInstance.get).toHaveBeenCalledWith('/data-tables/dt-1/rows', { params });
+      expect(result).toEqual(response);
+    });
+
+    it('should handle error', async () => {
+      const error = {
+        message: 'Request failed',
+        response: { status: 500, data: { message: 'Internal server error' } },
+      };
+      await mockAxiosInstance.simulateError('get', error);
+
+      try {
+        await client.getDataTableRows('dt-1');
+        expect.fail('Should have thrown an error');
+      } catch (err) {
+        expect(err).toBeInstanceOf(N8nServerError);
+        expect((err as N8nServerError).statusCode).toBe(500);
+      }
+    });
+  });
+
+  describe('insertDataTableRows', () => {
+    beforeEach(() => {
+      client = new N8nApiClient(defaultConfig);
+    });
+
+    it('should insert data table rows successfully', async () => {
+      const insertResult = { insertedCount: 2 };
+      mockAxiosInstance.post.mockResolvedValue({ data: insertResult });
+
+      const params = { data: [{ email: 'a@b.com' }, { email: 'c@d.com' }], returnType: 'count' as const };
+      const result = await client.insertDataTableRows('dt-1', params);
+
+      expect(mockAxiosInstance.post).toHaveBeenCalledWith('/data-tables/dt-1/rows', params);
+      expect(result).toEqual(insertResult);
+    });
+
+    it('should handle 400 error', async () => {
+      const error = {
+        message: 'Request failed',
+        response: { status: 400, data: { message: 'Invalid row data' } },
+      };
+      await mockAxiosInstance.simulateError('post', error);
+
+      try {
+        await client.insertDataTableRows('dt-1', { data: [{}] });
+        expect.fail('Should have thrown an error');
+      } catch (err) {
+        expect(err).toBeInstanceOf(N8nValidationError);
+        expect((err as N8nValidationError).message).toBe('Invalid row data');
+        expect((err as N8nValidationError).statusCode).toBe(400);
+      }
+    });
+  });
+
+  describe('updateDataTableRows', () => {
+    beforeEach(() => {
+      client = new N8nApiClient(defaultConfig);
+    });
+
+    it('should update data table rows successfully', async () => {
+      const updateResult = { updatedCount: 3 };
+      mockAxiosInstance.patch.mockResolvedValue({ data: updateResult });
+
+      const params = {
+        filter: { type: 'and' as const, filters: [{ columnName: 'status', condition: 'eq' as const, value: 'old' }] },
+        data: { status: 'new' },
+      };
+      const result = await client.updateDataTableRows('dt-1', params);
+
+      expect(mockAxiosInstance.patch).toHaveBeenCalledWith('/data-tables/dt-1/rows/update', params);
+      expect(result).toEqual(updateResult);
+    });
+
+    it('should handle error', async () => {
+      const error = {
+        message: 'Request failed',
+        response: { status: 500, data: { message: 'Internal server error' } },
+      };
+      await mockAxiosInstance.simulateError('patch', error);
+
+      try {
+        await client.updateDataTableRows('dt-1', {
+          filter: { type: 'and', filters: [{ columnName: 'id', condition: 'eq', value: 1 }] },
+          data: { name: 'test' },
+        });
+        expect.fail('Should have thrown an error');
+      } catch (err) {
+        expect(err).toBeInstanceOf(N8nServerError);
+        expect((err as N8nServerError).statusCode).toBe(500);
+      }
+    });
+  });
+
+  describe('upsertDataTableRow', () => {
+    beforeEach(() => {
+      client = new N8nApiClient(defaultConfig);
+    });
+
+    it('should upsert data table row successfully', async () => {
+      const upsertResult = { action: 'updated', row: { id: 1, email: 'a@b.com' } };
+      mockAxiosInstance.post.mockResolvedValue({ data: upsertResult });
+
+      const params = {
+        filter: { type: 'and' as const, filters: [{ columnName: 'email', condition: 'eq' as const, value: 'a@b.com' }] },
+        data: { score: 15 },
+      };
+      const result = await client.upsertDataTableRow('dt-1', params);
+
+      expect(mockAxiosInstance.post).toHaveBeenCalledWith('/data-tables/dt-1/rows/upsert', params);
+      expect(result).toEqual(upsertResult);
+    });
+
+    it('should handle error', async () => {
+      const error = {
+        message: 'Request failed',
+        response: { status: 400, data: { message: 'Invalid upsert params' } },
+      };
+      await mockAxiosInstance.simulateError('post', error);
+
+      try {
+        await client.upsertDataTableRow('dt-1', {
+          filter: { type: 'and', filters: [{ columnName: 'id', condition: 'eq', value: 1 }] },
+          data: { name: 'test' },
+        });
+        expect.fail('Should have thrown an error');
+      } catch (err) {
+        expect(err).toBeInstanceOf(N8nValidationError);
+        expect((err as N8nValidationError).statusCode).toBe(400);
+      }
+    });
+  });
+
+  describe('deleteDataTableRows', () => {
+    beforeEach(() => {
+      client = new N8nApiClient(defaultConfig);
+    });
+
+    it('should delete data table rows successfully', async () => {
+      const deleteResult = { deletedCount: 2 };
+      mockAxiosInstance.delete.mockResolvedValue({ data: deleteResult });
+
+      const params = { filter: '{"type":"and","filters":[]}', dryRun: false };
+      const result = await client.deleteDataTableRows('dt-1', params);
+
+      expect(mockAxiosInstance.delete).toHaveBeenCalledWith('/data-tables/dt-1/rows/delete', { params });
+      expect(result).toEqual(deleteResult);
+    });
+
+    it('should handle error', async () => {
+      const error = {
+        message: 'Request failed',
+        response: { status: 500, data: { message: 'Internal server error' } },
+      };
+      await mockAxiosInstance.simulateError('delete', error);
+
+      try {
+        await client.deleteDataTableRows('dt-1', { filter: '{}' });
+        expect.fail('Should have thrown an error');
+      } catch (err) {
+        expect(err).toBeInstanceOf(N8nServerError);
+        expect((err as N8nServerError).statusCode).toBe(500);
+      }
+    });
+  });
+
   describe('interceptors', () => {
     let requestInterceptor: any;
     let responseInterceptor: any;
@@ -1317,4 +1724,4 @@ describe('N8nApiClient', () => {
       expect(result.message).toBe('Bad request');
     });
   });
-});
+});

tests/unit/services/workflow-diff-engine.test.ts

@@ -17,7 +17,8 @@ import {
   AddTagOperation,
   RemoveTagOperation,
   CleanStaleConnectionsOperation,
-  ReplaceConnectionsOperation
+  ReplaceConnectionsOperation,
+  TransferWorkflowOperation
 } from '@/types/workflow-diff';
 import { Workflow } from '@/types/n8n-api';
 
@@ -4989,4 +4990,151 @@ describe('WorkflowDiffEngine', () => {
       expect('nonExistent' in updatedNode).toBe(false);
     });
   });
-});
+
+  describe('transferWorkflow operation', () => {
+    it('should set transferToProjectId in result for valid transferWorkflow', async () => {
+      const operation: TransferWorkflowOperation = {
+        type: 'transferWorkflow',
+        destinationProjectId: 'project-abc-123'
+      };
+
+      const request: WorkflowDiffRequest = {
+        id: 'test-workflow',
+        operations: [operation]
+      };
+
+      const result = await diffEngine.applyDiff(baseWorkflow, request);
+
+      expect(result.success).toBe(true);
+      expect(result.transferToProjectId).toBe('project-abc-123');
+    });
+
+    it('should fail validation when destinationProjectId is empty', async () => {
+      const operation: TransferWorkflowOperation = {
+        type: 'transferWorkflow',
+        destinationProjectId: ''
+      };
+
+      const request: WorkflowDiffRequest = {
+        id: 'test-workflow',
+        operations: [operation]
+      };
+
+      const result = await diffEngine.applyDiff(baseWorkflow, request);
+
+      expect(result.success).toBe(false);
+      expect(result.errors).toBeDefined();
+      expect(result.errors![0].message).toContain('destinationProjectId');
+    });
+
+    it('should fail validation when destinationProjectId is undefined', async () => {
+      const operation = {
+        type: 'transferWorkflow',
+        destinationProjectId: undefined
+      } as any as TransferWorkflowOperation;
+
+      const request: WorkflowDiffRequest = {
+        id: 'test-workflow',
+        operations: [operation]
+      };
+
+      const result = await diffEngine.applyDiff(baseWorkflow, request);
+
+      expect(result.success).toBe(false);
+      expect(result.errors).toBeDefined();
+      expect(result.errors![0].message).toContain('destinationProjectId');
+    });
+
+    it('should not include transferToProjectId when no transferWorkflow operation is present', async () => {
+      const operation: UpdateNameOperation = {
+        type: 'updateName',
+        name: 'Renamed Workflow'
+      };
+
+      const request: WorkflowDiffRequest = {
+        id: 'test-workflow',
+        operations: [operation]
+      };
+
+      const result = await diffEngine.applyDiff(baseWorkflow, request);
+
+      expect(result.success).toBe(true);
+      expect(result.transferToProjectId).toBeUndefined();
+    });
+
+    it('should combine updateName and transferWorkflow operations', async () => {
+      const operations: WorkflowDiffOperation[] = [
+        {
+          type: 'updateName',
+          name: 'Transferred Workflow'
+        } as UpdateNameOperation,
+        {
+          type: 'transferWorkflow',
+          destinationProjectId: 'project-xyz-789'
+        } as TransferWorkflowOperation
+      ];
+
+      const request: WorkflowDiffRequest = {
+        id: 'test-workflow',
+        operations
+      };
+
+      const result = await diffEngine.applyDiff(baseWorkflow, request);
+
+      expect(result.success).toBe(true);
+      expect(result.operationsApplied).toBe(2);
+      expect(result.workflow!.name).toBe('Transferred Workflow');
+      expect(result.transferToProjectId).toBe('project-xyz-789');
+    });
+
+    it('should combine removeTag and transferWorkflow in continueOnError mode', async () => {
+      const operations: WorkflowDiffOperation[] = [
+        {
+          type: 'removeTag',
+          tag: 'non-existent-tag'
+        } as RemoveTagOperation,
+        {
+          type: 'transferWorkflow',
+          destinationProjectId: 'project-target-456'
+        } as TransferWorkflowOperation
+      ];
+
+      const request: WorkflowDiffRequest = {
+        id: 'test-workflow',
+        operations,
+        continueOnError: true
+      };
+
+      const result = await diffEngine.applyDiff(baseWorkflow, request);
+
+      expect(result.success).toBe(true);
+      expect(result.transferToProjectId).toBe('project-target-456');
+    });
+
+    it('should fail entire batch in atomic mode when transferWorkflow has empty destinationProjectId alongside updateName', async () => {
+      const operations: WorkflowDiffOperation[] = [
+        {
+          type: 'updateName',
+          name: 'Should Not Apply'
+        } as UpdateNameOperation,
+        {
+          type: 'transferWorkflow',
+          destinationProjectId: ''
+        } as TransferWorkflowOperation
+      ];
+
+      const request: WorkflowDiffRequest = {
+        id: 'test-workflow',
+        operations
+      };
+
+      const result = await diffEngine.applyDiff(baseWorkflow, request);
+
+      expect(result.success).toBe(false);
+      expect(result.errors).toBeDefined();
+      expect(result.errors![0].message).toContain('destinationProjectId');
+      // In atomic mode, the workflow should not be returned since the batch failed
+      expect(result.workflow).toBeUndefined();
+    });
+  });
+});