test: update tests for v2.28.5 behavior changes (v2.28.6)

- Update n8n-version tests: 'v' prefix now supported in version strings
- Update n8n-validation tests: empty settings now return minimal defaults
  { executionOrder: 'v1' } instead of {} to avoid API rejection (Issue #431)

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

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

CHANGELOG.md

@@ -7,6 +7,19 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [2.28.6] - 2025-12-05
+
+### Bug Fixes
+
+**Test Updates for v2.28.5 Behavior Changes**
+
+Fixed test expectations to match v2.28.5 implementation changes:
+
+- **n8n-version tests**: Updated to verify 'v' prefix support in version strings (e.g., `v1.2.3`)
+- **n8n-validation tests**: Updated expectations for empty settings handling - now returns minimal defaults `{ executionOrder: 'v1' }` instead of `{}` to avoid n8n API rejection (Issue #431)
+
+**Conceived by Romuald Członkowski - [AiAdvisors](https://www.aiadvisors.pl/en)**
+
 ## [2.28.5] - 2025-12-05
 
 ### Bug Fixes

dist/http-server-single-session.js

@@ -24,7 +24,7 @@ const protocol_version_1 = require("./utils/protocol-version");
 const instance_context_1 = require("./types/instance-context");
 dotenv_1.default.config();
 const DEFAULT_PROTOCOL_VERSION = protocol_version_1.STANDARD_PROTOCOL_VERSION;
-const MAX_SESSIONS = 100;
+const MAX_SESSIONS = Math.max(1, parseInt(process.env.N8N_MCP_MAX_SESSIONS || '100', 10));
 const SESSION_CLEANUP_INTERVAL = 5 * 60 * 1000;
 function extractMultiTenantHeaders(req) {
     return {

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

@@ -10,9 +10,10 @@ export declare class N8nApiClient {
     private maxRetries;
     private baseUrl;
     private versionInfo;
-    private versionFetched;
+    private versionPromise;
     constructor(config: N8nApiClientConfig);
     getVersion(): Promise<N8nVersionInfo | null>;
+    private fetchVersionOnce;
     getCachedVersionInfo(): N8nVersionInfo | null;
     healthCheck(): Promise<HealthCheckResponse>;
     createWorkflow(workflow: Partial<Workflow>): Promise<Workflow>;

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

@@ -1 +1 @@
-{"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,CAAS;gBAEnB,MAAM,EAAE,kBAAkB;IAoDhC,UAAU,IAAI,OAAO,CAAC,cAAc,GAAG,IAAI,CAAC;IAgBlD,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,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;IASpC,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"}
+{"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,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;IASpC,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

@@ -45,7 +45,7 @@ const n8n_version_1 = require("./n8n-version");
 class N8nApiClient {
     constructor(config) {
         this.versionInfo = null;
-        this.versionFetched = false;
+        this.versionPromise = null;
         const { baseUrl, apiKey, timeout = 30000, maxRetries = 3 } = config;
         this.maxRetries = maxRetries;
         this.baseUrl = baseUrl;
@@ -80,14 +80,27 @@ class N8nApiClient {
         });
     }
     async getVersion() {
-        if (!this.versionFetched) {
-            this.versionInfo = (0, n8n_version_1.getCachedVersion)(this.baseUrl);
-            if (!this.versionInfo) {
-                this.versionInfo = await (0, n8n_version_1.fetchN8nVersion)(this.baseUrl);
-            }
-            this.versionFetched = true;
+        if (this.versionInfo) {
+            return this.versionInfo;
         }
-        return this.versionInfo;
+        if (this.versionPromise) {
+            return this.versionPromise;
+        }
+        this.versionPromise = this.fetchVersionOnce();
+        try {
+            this.versionInfo = await this.versionPromise;
+            return this.versionInfo;
+        }
+        finally {
+            this.versionPromise = null;
+        }
+    }
+    async fetchVersionOnce() {
+        let version = (0, n8n_version_1.getCachedVersion)(this.baseUrl);
+        if (!version) {
+            version = await (0, n8n_version_1.fetchN8nVersion)(this.baseUrl);
+        }
+        return version;
     }
     getCachedVersionInfo() {
         return this.versionInfo;

dist/services/n8n-validation.d.ts.map

@@ -1 +1 @@
-{"version":3,"file":"n8n-validation.d.ts","sourceRoot":"","sources":["../../src/services/n8n-validation.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,CAAC,EAAE,MAAM,KAAK,CAAC;AACxB,OAAO,EAAE,YAAY,EAAE,kBAAkB,EAAE,QAAQ,EAAE,MAAM,kBAAkB,CAAC;AAM9E,eAAO,MAAM,kBAAkB;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;EAiB7B,CAAC;AAkBH,eAAO,MAAM,wBAAwB;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;GAUpC,CAAC;AAEF,eAAO,MAAM,sBAAsB;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;EAWjC,CAAC;AAGH,eAAO,MAAM,uBAAuB;;;;;;CAMnC,CAAC;AAGF,wBAAgB,oBAAoB,CAAC,IAAI,EAAE,OAAO,GAAG,YAAY,CAEhE;AAED,wBAAgB,2BAA2B,CAAC,WAAW,EAAE,OAAO,GAAG,kBAAkB,CAEpF;AAED,wBAAgB,wBAAwB,CAAC,QAAQ,EAAE,OAAO,GAAG,CAAC,CAAC,KAAK,CAAC,OAAO,sBAAsB,CAAC,CAElG;AAGD,wBAAgB,sBAAsB,CAAC,QAAQ,EAAE,OAAO,CAAC,QAAQ,CAAC,GAAG,OAAO,CAAC,QAAQ,CAAC,CAsBrF;AAiBD,wBAAgB,sBAAsB,CAAC,QAAQ,EAAE,QAAQ,GAAG,OAAO,CAAC,QAAQ,CAAC,CA4D5E;AAGD,wBAAgB,yBAAyB,CAAC,QAAQ,EAAE,OAAO,CAAC,QAAQ,CAAC,GAAG,MAAM,EAAE,CAyP/E;AAGD,wBAAgB,iBAAiB,CAAC,QAAQ,EAAE,QAAQ,GAAG,OAAO,CAK7D;AAMD,wBAAgB,+BAA+B,CAAC,IAAI,EAAE,YAAY,GAAG,MAAM,EAAE,CA+F5E;AAMD,wBAAgB,yBAAyB,CAAC,QAAQ,EAAE,GAAG,EAAE,IAAI,EAAE,MAAM,GAAG,MAAM,EAAE,CA0D/E;AAGD,wBAAgB,aAAa,CAAC,QAAQ,EAAE,QAAQ,GAAG,MAAM,GAAG,IAAI,CAmB/D;AAGD,wBAAgB,2BAA2B,IAAI,MAAM,CA6CpD;AAGD,wBAAgB,yBAAyB,CAAC,MAAM,EAAE,MAAM,EAAE,GAAG,MAAM,EAAE,CAmBpE"}
+{"version":3,"file":"n8n-validation.d.ts","sourceRoot":"","sources":["../../src/services/n8n-validation.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,CAAC,EAAE,MAAM,KAAK,CAAC;AACxB,OAAO,EAAE,YAAY,EAAE,kBAAkB,EAAE,QAAQ,EAAE,MAAM,kBAAkB,CAAC;AAM9E,eAAO,MAAM,kBAAkB;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;EAiB7B,CAAC;AAkBH,eAAO,MAAM,wBAAwB;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;GAUpC,CAAC;AAEF,eAAO,MAAM,sBAAsB;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;EAWjC,CAAC;AAGH,eAAO,MAAM,uBAAuB;;;;;;CAMnC,CAAC;AAGF,wBAAgB,oBAAoB,CAAC,IAAI,EAAE,OAAO,GAAG,YAAY,CAEhE;AAED,wBAAgB,2BAA2B,CAAC,WAAW,EAAE,OAAO,GAAG,kBAAkB,CAEpF;AAED,wBAAgB,wBAAwB,CAAC,QAAQ,EAAE,OAAO,GAAG,CAAC,CAAC,KAAK,CAAC,OAAO,sBAAsB,CAAC,CAElG;AAGD,wBAAgB,sBAAsB,CAAC,QAAQ,EAAE,OAAO,CAAC,QAAQ,CAAC,GAAG,OAAO,CAAC,QAAQ,CAAC,CAsBrF;AAiBD,wBAAgB,sBAAsB,CAAC,QAAQ,EAAE,QAAQ,GAAG,OAAO,CAAC,QAAQ,CAAC,CAoE5E;AAGD,wBAAgB,yBAAyB,CAAC,QAAQ,EAAE,OAAO,CAAC,QAAQ,CAAC,GAAG,MAAM,EAAE,CAyP/E;AAGD,wBAAgB,iBAAiB,CAAC,QAAQ,EAAE,QAAQ,GAAG,OAAO,CAK7D;AAMD,wBAAgB,+BAA+B,CAAC,IAAI,EAAE,YAAY,GAAG,MAAM,EAAE,CA+F5E;AAMD,wBAAgB,yBAAyB,CAAC,QAAQ,EAAE,GAAG,EAAE,IAAI,EAAE,MAAM,GAAG,MAAM,EAAE,CA0D/E;AAGD,wBAAgB,aAAa,CAAC,QAAQ,EAAE,QAAQ,GAAG,MAAM,GAAG,IAAI,CAmB/D;AAGD,wBAAgB,2BAA2B,IAAI,MAAM,CA6CpD;AAGD,wBAAgB,yBAAyB,CAAC,MAAM,EAAE,MAAM,EAAE,GAAG,MAAM,EAAE,CAmBpE"}

dist/services/n8n-validation.js

@@ -106,10 +106,15 @@ function cleanWorkflowForUpdate(workflow) {
                 filteredSettings[key] = value;
             }
         }
-        cleanedWorkflow.settings = filteredSettings;
+        if (Object.keys(filteredSettings).length > 0) {
+            cleanedWorkflow.settings = filteredSettings;
+        }
+        else {
+            cleanedWorkflow.settings = { executionOrder: 'v1' };
+        }
     }
     else {
-        cleanedWorkflow.settings = {};
+        cleanedWorkflow.settings = { executionOrder: 'v1' };
     }
     return cleanedWorkflow;
 }

dist/services/n8n-version.d.ts.map

@@ -1 +1 @@
-{"version":3,"file":"n8n-version.d.ts","sourceRoot":"","sources":["../../src/services/n8n-version.ts"],"names":[],"mappings":"AAoBA,OAAO,EAAE,cAAc,EAAuB,MAAM,kBAAkB,CAAC;AAkCvE,wBAAgB,YAAY,CAAC,aAAa,EAAE,MAAM,GAAG,cAAc,GAAG,IAAI,CAazE;AAKD,wBAAgB,eAAe,CAAC,CAAC,EAAE,cAAc,EAAE,CAAC,EAAE,cAAc,GAAG,MAAM,CAI5E;AAKD,wBAAgB,cAAc,CAAC,OAAO,EAAE,cAAc,EAAE,KAAK,EAAE,MAAM,EAAE,KAAK,EAAE,MAAM,EAAE,KAAK,SAAI,GAAG,OAAO,CAGxG;AAKD,wBAAgB,8BAA8B,CAAC,OAAO,EAAE,cAAc,GAAG,GAAG,CAAC,MAAM,CAAC,CAcnF;AASD,wBAAsB,eAAe,CAAC,OAAO,EAAE,MAAM,GAAG,OAAO,CAAC,cAAc,GAAG,IAAI,CAAC,CAgDrF;AAKD,wBAAgB,iBAAiB,IAAI,IAAI,CAExC;AAKD,wBAAgB,gBAAgB,CAAC,OAAO,EAAE,MAAM,GAAG,cAAc,GAAG,IAAI,CAEvE;AAKD,wBAAgB,gBAAgB,CAAC,OAAO,EAAE,MAAM,EAAE,OAAO,EAAE,cAAc,GAAG,IAAI,CAE/E;AAYD,wBAAgB,uBAAuB,CACrC,QAAQ,EAAE,MAAM,CAAC,MAAM,EAAE,OAAO,CAAC,GAAG,SAAS,EAC7C,OAAO,EAAE,cAAc,GAAG,IAAI,GAC7B,MAAM,CAAC,MAAM,EAAE,OAAO,CAAC,CAsBzB;AAGD,eAAO,MAAM,kBAAkB;;;;;;;;;;;CAG9B,CAAC"}
+{"version":3,"file":"n8n-version.d.ts","sourceRoot":"","sources":["../../src/services/n8n-version.ts"],"names":[],"mappings":"AAoBA,OAAO,EAAE,cAAc,EAAuB,MAAM,kBAAkB,CAAC;AA0CvE,wBAAgB,YAAY,CAAC,aAAa,EAAE,MAAM,GAAG,cAAc,GAAG,IAAI,CAczE;AAKD,wBAAgB,eAAe,CAAC,CAAC,EAAE,cAAc,EAAE,CAAC,EAAE,cAAc,GAAG,MAAM,CAI5E;AAKD,wBAAgB,cAAc,CAAC,OAAO,EAAE,cAAc,EAAE,KAAK,EAAE,MAAM,EAAE,KAAK,EAAE,MAAM,EAAE,KAAK,SAAI,GAAG,OAAO,CAGxG;AAKD,wBAAgB,8BAA8B,CAAC,OAAO,EAAE,cAAc,GAAG,GAAG,CAAC,MAAM,CAAC,CAcnF;AASD,wBAAsB,eAAe,CAAC,OAAO,EAAE,MAAM,GAAG,OAAO,CAAC,cAAc,GAAG,IAAI,CAAC,CAoDrF;AAKD,wBAAgB,iBAAiB,IAAI,IAAI,CAExC;AAKD,wBAAgB,gBAAgB,CAAC,OAAO,EAAE,MAAM,GAAG,cAAc,GAAG,IAAI,CAMvE;AAKD,wBAAgB,gBAAgB,CAAC,OAAO,EAAE,MAAM,EAAE,OAAO,EAAE,cAAc,GAAG,IAAI,CAE/E;AAYD,wBAAgB,uBAAuB,CACrC,QAAQ,EAAE,MAAM,CAAC,MAAM,EAAE,OAAO,CAAC,GAAG,SAAS,EAC7C,OAAO,EAAE,cAAc,GAAG,IAAI,GAC7B,MAAM,CAAC,MAAM,EAAE,OAAO,CAAC,CAsBzB;AAGD,eAAO,MAAM,kBAAkB;;;;;;;;;;;CAG9B,CAAC"}

dist/services/n8n-version.js

@@ -15,6 +15,7 @@ exports.setCachedVersion = setCachedVersion;
 exports.cleanSettingsForVersion = cleanSettingsForVersion;
 const axios_1 = __importDefault(require("axios"));
 const logger_1 = require("../utils/logger");
+const VERSION_CACHE_TTL_MS = 5 * 60 * 1000;
 const versionCache = new Map();
 const SETTINGS_BY_VERSION = {
     core: [
@@ -37,7 +38,7 @@ const SETTINGS_BY_VERSION = {
     ],
 };
 function parseVersion(versionString) {
-    const match = versionString.match(/^(\d+)\.(\d+)\.(\d+)/);
+    const match = versionString.match(/^v?(\d+)\.(\d+)\.(\d+)/);
     if (!match) {
         return null;
     }
@@ -71,9 +72,9 @@ function getSupportedSettingsProperties(version) {
 }
 async function fetchN8nVersion(baseUrl) {
     const cached = versionCache.get(baseUrl);
-    if (cached) {
-        logger_1.logger.debug(`Using cached n8n version for ${baseUrl}: ${cached.version}`);
-        return cached;
+    if (cached && Date.now() - cached.fetchedAt < VERSION_CACHE_TTL_MS) {
+        logger_1.logger.debug(`Using cached n8n version for ${baseUrl}: ${cached.info.version}`);
+        return cached.info;
     }
     try {
         const cleanBaseUrl = baseUrl.replace(/\/api\/v\d+\/?$/, '').replace(/\/$/, '');
@@ -89,11 +90,15 @@ async function fetchN8nVersion(baseUrl) {
                 logger_1.logger.warn('No data in settings response');
                 return null;
             }
-            const versionString = settings.n8nVersion || settings.versionCli;
+            const versionString = typeof settings.n8nVersion === 'string'
+                ? settings.n8nVersion
+                : typeof settings.versionCli === 'string'
+                    ? settings.versionCli
+                    : null;
             if (versionString) {
                 const versionInfo = parseVersion(versionString);
                 if (versionInfo) {
-                    versionCache.set(baseUrl, versionInfo);
+                    versionCache.set(baseUrl, { info: versionInfo, fetchedAt: Date.now() });
                     logger_1.logger.debug(`Detected n8n version: ${versionInfo.version}`);
                     return versionInfo;
                 }
@@ -111,10 +116,14 @@ function clearVersionCache() {
     versionCache.clear();
 }
 function getCachedVersion(baseUrl) {
-    return versionCache.get(baseUrl) || null;
+    const cached = versionCache.get(baseUrl);
+    if (cached && Date.now() - cached.fetchedAt < VERSION_CACHE_TTL_MS) {
+        return cached.info;
+    }
+    return null;
 }
 function setCachedVersion(baseUrl, version) {
-    versionCache.set(baseUrl, version);
+    versionCache.set(baseUrl, { info: version, fetchedAt: Date.now() });
 }
 function cleanSettingsForVersion(settings, version) {
     if (!settings || typeof settings !== 'object') {

dist/services/n8n-version.js.map

@@ -1 +1 @@
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+{"version":3,"file":"n8n-version.js","sourceRoot":"","sources":["../../src/services/n8n-version.ts"],"names":[],"mappings":";;;;;;AA8DA,oCAcC;AAKD,0CAIC;AAKD,wCAGC;AAKD,wEAcC;AASD,0CAoDC;AAKD,8CAEC;AAKD,4CAMC;AAKD,4CAEC;AAYD,0DAyBC;AAzND,kDAA0B;AAC1B,4CAAyC;AAUzC,MAAM,oBAAoB,GAAG,CAAC,GAAG,EAAE,GAAG,IAAI,CAAC;AAE3C,MAAM,YAAY,GAAG,IAAI,GAAG,EAAyB,CAAC;AAItD,MAAM,mBAAmB,GAAG;IAE1B,IAAI,EAAE;QACJ,uBAAuB;QACvB,sBAAsB;QACtB,wBAAwB;QACxB,0BAA0B;QAC1B,kBAAkB;QAClB,eAAe;QACf,UAAU;KACX;IAED,OAAO,EAAE;QACP,gBAAgB;KACjB;IAED,QAAQ,EAAE;QACR,cAAc;QACd,WAAW;QACX,uBAAuB;QACvB,gBAAgB;KACjB;CACF,CAAC;AAKF,SAAgB,YAAY,CAAC,aAAqB;IAGhD,MAAM,KAAK,GAAG,aAAa,CAAC,KAAK,CAAC,wBAAwB,CAAC,CAAC;IAC5D,IAAI,CAAC,KAAK,EAAE,CAAC;QACX,OAAO,IAAI,CAAC;IACd,CAAC;IAED,OAAO;QACL,OAAO,EAAE,aAAa;QACtB,KAAK,EAAE,QAAQ,CAAC,KAAK,CAAC,CAAC,CAAC,EAAE,EAAE,CAAC;QAC7B,KAAK,EAAE,QAAQ,CAAC,KAAK,CAAC,CAAC,CAAC,EAAE,EAAE,CAAC;QAC7B,KAAK,EAAE,QAAQ,CAAC,KAAK,CAAC,CAAC,CAAC,EAAE,EAAE,CAAC;KAC9B,CAAC;AACJ,CAAC;AAKD,SAAgB,eAAe,CAAC,CAAiB,EAAE,CAAiB;IAClE,IAAI,CAAC,CAAC,KAAK,KAAK,CAAC,CAAC,KAAK;QAAE,OAAO,CAAC,CAAC,KAAK,GAAG,CAAC,CAAC,KAAK,CAAC;IAClD,IAAI,CAAC,CAAC,KAAK,KAAK,CAAC,CAAC,KAAK;QAAE,OAAO,CAAC,CAAC,KAAK,GAAG,CAAC,CAAC,KAAK,CAAC;IAClD,OAAO,CAAC,CAAC,KAAK,GAAG,CAAC,CAAC,KAAK,CAAC;AAC3B,CAAC;AAKD,SAAgB,cAAc,CAAC,OAAuB,EAAE,KAAa,EAAE,KAAa,EAAE,KAAK,GAAG,CAAC;IAC7F,MAAM,MAAM,GAAG,EAAE,OAAO,EAAE,EAAE,EAAE,KAAK,EAAE,KAAK,EAAE,KAAK,EAAE,CAAC;IACpD,OAAO,eAAe,CAAC,OAAO,EAAE,MAAM,CAAC,IAAI,CAAC,CAAC;AAC/C,CAAC;AAKD,SAAgB,8BAA8B,CAAC,OAAuB;IACpE,MAAM,SAAS,GAAG,IAAI,GAAG,CAAS,mBAAmB,CAAC,IAAI,CAAC,CAAC;IAG5D,IAAI,cAAc,CAAC,OAAO,EAAE,CAAC,EAAE,EAAE,EAAE,CAAC,CAAC,EAAE,CAAC;QACtC,mBAAmB,CAAC,OAAO,CAAC,OAAO,CAAC,IAAI,CAAC,EAAE,CAAC,SAAS,CAAC,GAAG,CAAC,IAAI,CAAC,CAAC,CAAC;IACnE,CAAC;IAGD,IAAI,cAAc,CAAC,OAAO,EAAE,CAAC,EAAE,GAAG,EAAE,CAAC,CAAC,EAAE,CAAC;QACvC,mBAAmB,CAAC,QAAQ,CAAC,OAAO,CAAC,IAAI,CAAC,EAAE,CAAC,SAAS,CAAC,GAAG,CAAC,IAAI,CAAC,CAAC,CAAC;IACpE,CAAC;IAED,OAAO,SAAS,CAAC;AACnB,CAAC;AASM,KAAK,UAAU,eAAe,CAAC,OAAe;IAEnD,MAAM,MAAM,GAAG,YAAY,CAAC,GAAG,CAAC,OAAO,CAAC,CAAC;IACzC,IAAI,MAAM,IAAI,IAAI,CAAC,GAAG,EAAE,GAAG,MAAM,CAAC,SAAS,GAAG,oBAAoB,EAAE,CAAC;QACnE,eAAM,CAAC,KAAK,CAAC,gCAAgC,OAAO,KAAK,MAAM,CAAC,IAAI,CAAC,OAAO,EAAE,CAAC,CAAC;QAChF,OAAO,MAAM,CAAC,IAAI,CAAC;IACrB,CAAC;IAED,IAAI,CAAC;QAEH,MAAM,YAAY,GAAG,OAAO,CAAC,OAAO,CAAC,iBAAiB,EAAE,EAAE,CAAC,CAAC,OAAO,CAAC,KAAK,EAAE,EAAE,CAAC,CAAC;QAC/E,MAAM,WAAW,GAAG,GAAG,YAAY,gBAAgB,CAAC;QAEpD,eAAM,CAAC,KAAK,CAAC,6BAA6B,WAAW,EAAE,CAAC,CAAC;QAEzD,MAAM,QAAQ,GAAG,MAAM,eAAK,CAAC,GAAG,CAAsB,WAAW,EAAE;YACjE,OAAO,EAAE,IAAI;YACb,cAAc,EAAE,CAAC,MAAc,EAAE,EAAE,CAAC,MAAM,GAAG,GAAG;SACjD,CAAC,CAAC;QAEH,IAAI,QAAQ,CAAC,MAAM,KAAK,GAAG,IAAI,QAAQ,CAAC,IAAI,EAAE,CAAC;YAE7C,MAAM,QAAQ,GAAG,QAAQ,CAAC,IAAI,CAAC,IAAI,CAAC;YACpC,IAAI,CAAC,QAAQ,EAAE,CAAC;gBACd,eAAM,CAAC,IAAI,CAAC,8BAA8B,CAAC,CAAC;gBAC5C,OAAO,IAAI,CAAC;YACd,CAAC;YAGD,MAAM,aAAa,GAAG,OAAO,QAAQ,CAAC,UAAU,KAAK,QAAQ;gBAC3D,CAAC,CAAC,QAAQ,CAAC,UAAU;gBACrB,CAAC,CAAC,OAAO,QAAQ,CAAC,UAAU,KAAK,QAAQ;oBACvC,CAAC,CAAC,QAAQ,CAAC,UAAU;oBACrB,CAAC,CAAC,IAAI,CAAC;YAEX,IAAI,aAAa,EAAE,CAAC;gBAClB,MAAM,WAAW,GAAG,YAAY,CAAC,aAAa,CAAC,CAAC;gBAChD,IAAI,WAAW,EAAE,CAAC;oBAEhB,YAAY,CAAC,GAAG,CAAC,OAAO,EAAE,EAAE,IAAI,EAAE,WAAW,EAAE,SAAS,EAAE,IAAI,CAAC,GAAG,EAAE,EAAE,CAAC,CAAC;oBACxE,eAAM,CAAC,KAAK,CAAC,yBAAyB,WAAW,CAAC,OAAO,EAAE,CAAC,CAAC;oBAC7D,OAAO,WAAW,CAAC;gBACrB,CAAC;YACH,CAAC;QACH,CAAC;QAED,eAAM,CAAC,IAAI,CAAC,wCAAwC,WAAW,EAAE,CAAC,CAAC;QACnE,OAAO,IAAI,CAAC;IACd,CAAC;IAAC,OAAO,KAAK,EAAE,CAAC;QACf,eAAM,CAAC,IAAI,CAAC,gCAAgC,KAAK,YAAY,KAAK,CAAC,CAAC,CAAC,KAAK,CAAC,OAAO,CAAC,CAAC,CAAC,eAAe,EAAE,CAAC,CAAC;QACxG,OAAO,IAAI,CAAC;IACd,CAAC;AACH,CAAC;AAKD,SAAgB,iBAAiB;IAC/B,YAAY,CAAC,KAAK,EAAE,CAAC;AACvB,CAAC;AAKD,SAAgB,gBAAgB,CAAC,OAAe;IAC9C,MAAM,MAAM,GAAG,YAAY,CAAC,GAAG,CAAC,OAAO,CAAC,CAAC;IACzC,IAAI,MAAM,IAAI,IAAI,CAAC,GAAG,EAAE,GAAG,MAAM,CAAC,SAAS,GAAG,oBAAoB,EAAE,CAAC;QACnE,OAAO,MAAM,CAAC,IAAI,CAAC;IACrB,CAAC;IACD,OAAO,IAAI,CAAC;AACd,CAAC;AAKD,SAAgB,gBAAgB,CAAC,OAAe,EAAE,OAAuB;IACvE,YAAY,CAAC,GAAG,CAAC,OAAO,EAAE,EAAE,IAAI,EAAE,OAAO,EAAE,SAAS,EAAE,IAAI,CAAC,GAAG,EAAE,EAAE,CAAC,CAAC;AACtE,CAAC;AAYD,SAAgB,uBAAuB,CACrC,QAA6C,EAC7C,OAA8B;IAE9B,IAAI,CAAC,QAAQ,IAAI,OAAO,QAAQ,KAAK,QAAQ,EAAE,CAAC;QAC9C,OAAO,EAAE,CAAC;IACZ,CAAC;IAGD,IAAI,CAAC,OAAO,EAAE,CAAC;QACb,OAAO,QAAQ,CAAC;IAClB,CAAC;IAED,MAAM,mBAAmB,GAAG,8BAA8B,CAAC,OAAO,CAAC,CAAC;IAEpE,MAAM,OAAO,GAA4B,EAAE,CAAC;IAC5C,KAAK,MAAM,CAAC,GAAG,EAAE,KAAK,CAAC,IAAI,MAAM,CAAC,OAAO,CAAC,QAAQ,CAAC,EAAE,CAAC;QACpD,IAAI,mBAAmB,CAAC,GAAG,CAAC,GAAG,CAAC,EAAE,CAAC;YACjC,OAAO,CAAC,GAAG,CAAC,GAAG,KAAK,CAAC;QACvB,CAAC;aAAM,CAAC;YACN,eAAM,CAAC,KAAK,CAAC,+CAA+C,GAAG,SAAS,OAAO,CAAC,OAAO,GAAG,CAAC,CAAC;QAC9F,CAAC;IACH,CAAC;IAED,OAAO,OAAO,CAAC;AACjB,CAAC;AAGY,QAAA,kBAAkB,GAAG;IAChC,eAAe,EAAE,EAAE,KAAK,EAAE,CAAC,EAAE,KAAK,EAAE,EAAE,EAAE,KAAK,EAAE,CAAC,EAAE;IAClD,aAAa,EAAE,EAAE,KAAK,EAAE,CAAC,EAAE,KAAK,EAAE,GAAG,EAAE,KAAK,EAAE,CAAC,EAAE;CAClD,CAAC"}

package.json

@@ -1,6 +1,6 @@
 {
   "name": "n8n-mcp",
-  "version": "2.28.5",
+  "version": "2.28.6",
   "description": "Integration between n8n workflow automation and Model Context Protocol (MCP)",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",

tests/unit/services/n8n-validation.test.ts

@@ -391,8 +391,8 @@ describe('n8n-validation', () => {
         } as any;
 
         const cleaned = cleanWorkflowForUpdate(workflow);
-        // n8n API now accepts empty settings {} - server preserves existing values
-        expect(cleaned.settings).toEqual({});
+        // Empty settings get minimal defaults to avoid API rejection (Issue #431)
+        expect(cleaned.settings).toEqual({ executionOrder: 'v1' });
       });
 
       it('should filter settings to safe properties to prevent API errors (Issue #248 - final fix)', () => {
@@ -489,11 +489,11 @@ describe('n8n-validation', () => {
         } as any;
 
         const cleaned = cleanWorkflowForUpdate(workflow);
-        // n8n API now accepts empty settings {} - server preserves existing values
-        expect(cleaned.settings).toEqual({});
+        // Empty settings get minimal defaults to avoid API rejection (Issue #431)
+        expect(cleaned.settings).toEqual({ executionOrder: 'v1' });
       });
 
-      it('should return empty settings when only non-whitelisted properties exist (Issue #431)', () => {
+      it('should return minimal defaults when only non-whitelisted properties exist (Issue #431)', () => {
         const workflow = {
           name: 'Test Workflow',
           nodes: [],
@@ -1410,8 +1410,8 @@ describe('n8n-validation', () => {
       expect(forUpdate).not.toHaveProperty('active');
       expect(forUpdate).not.toHaveProperty('tags');
       expect(forUpdate).not.toHaveProperty('meta');
-      // n8n API now accepts empty settings {} - server preserves existing values
-      expect(forUpdate.settings).toEqual({});
+      // Empty settings get minimal defaults to avoid API rejection (Issue #431)
+      expect(forUpdate.settings).toEqual({ executionOrder: 'v1' });
       expect(validateWorkflowStructure(forUpdate)).toEqual([]);
     });
   });

tests/unit/services/n8n-version.test.ts

@@ -55,7 +55,16 @@ describe('n8n-version', () => {
       expect(parseVersion('invalid')).toBeNull();
       expect(parseVersion('')).toBeNull();
       expect(parseVersion('1.2')).toBeNull();
-      expect(parseVersion('v1.2.3')).toBeNull(); // No 'v' prefix support
+    });
+
+    it('should handle v prefix in version strings', () => {
+      const result = parseVersion('v1.2.3');
+      expect(result).toEqual({
+        version: 'v1.2.3',
+        major: 1,
+        minor: 2,
+        patch: 3,
+      });
     });
   });