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6 Commits

Author SHA1 Message Date
Romuald Członkowski
65f51ad8b5 chore: bump version to 2.22.9 (#395)
* chore: bump version to 2.22.9

Updated version number to trigger release workflow after n8n 1.118.1 update.
Previous version 2.22.8 was already released on 2025-10-28, so the release
workflow did not trigger when PR #393 was merged.

Changes:
- Bump package.json version from 2.22.8 to 2.22.9
- Update CHANGELOG.md with correct version and date

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>

* docs: update n8n update workflow with lessons learned

Added new fast workflow section based on 2025-11-04 update experience:
- CRITICAL: Check existing releases first to avoid version conflicts
- Skip local tests - CI runs them anyway (saves 2-3 min)
- Integration test failures with 'unauthorized' are infrastructure issues
- Release workflow only triggers on version CHANGE
- Updated time estimates for fast vs full workflow

This will make future n8n updates smoother and faster.

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>

* fix: exclude versionCounter from workflow updates for n8n 1.118.1

n8n 1.118.1 returns versionCounter in GET /workflows/{id} responses but
rejects it in PUT /workflows/{id} updates with the error:
'request/body must NOT have additional properties'

This was causing all integration tests to fail in CI with n8n 1.118.1.

Changes:
- Added versionCounter to excluded properties in cleanWorkflowForUpdate()
- Tested and verified fix works with n8n 1.118.1 test instance

Fixes CI failures in PR #395

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>

* chore: improve versionCounter fix with types and tests

- Add versionCounter type definition to Workflow and WorkflowExport interfaces
- Add comprehensive test coverage for versionCounter exclusion
- Update CHANGELOG with detailed bug fix documentation

Addresses code review feedback from PR #395

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

---------

Co-authored-by: Claude <noreply@anthropic.com>
2025-11-04 11:33:54 +01:00
Romuald Członkowski
af6efe9e88 chore: update n8n to 1.118.1 and bump version to 2.22.8 (#393)
- Updated n8n from 1.117.2 to 1.118.1
- Updated n8n-core from 1.116.0 to 1.117.0
- Updated n8n-workflow from 1.114.0 to 1.115.0
- Updated @n8n/n8n-nodes-langchain from 1.116.2 to 1.117.0
- Rebuilt node database with 542 nodes (439 from n8n-nodes-base, 103 from @n8n/n8n-nodes-langchain)
- Updated README badge with new n8n version
- Updated CHANGELOG with dependency changes

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>
2025-11-03 22:27:56 +01:00
Romuald Członkowski
3f427f9528 Update n8n to 1.117.2 (#379) 2025-10-28 08:55:20 +01:00
Liz
18b8747005 Update CLAUDE_CODE_SETUP.md (#276)
* Update CLAUDE_CODE_SETUP.md

docs: Improve CLI setup for PowerShell and scope management

This commit introduces two improvements to the CLAUDE_CODE_SETUP.md documentation to enhance user experience, particularly for Windows users and those managing configuration scopes.

1.  Add PowerShell-Compatible Commands:
    The original `claude mcp add` commands use a syntax that fails in native Windows PowerShell due to its parameter parsing. This change adds dedicated code blocks for PowerShell, which correctly wrap the `-e` arguments in single quotes.

2.  Clarify Configuration Scope Management:
    The documentation previously lacked guidance on the default configuration scope and how to switch to a `project` scope. A new "Tips" section has been added to:
    - Explain the default scope and the purpose of `--scope project`.
    - Provide a clear, recommended CLI method for switching scopes.
    - Offer an advanced, manual method by editing the `.claude.json` file.

* Update CLAUDE_CODE_SETUP.md  again
2025-10-27 22:43:48 +01:00
Daniel Ishi
749f1c53eb docs: Emphasize MCP_MODE=stdio requirement for Claude Desktop (#377)
Fixes #376

Without this environment variable, Claude Desktop shows JSON parsing errors
because debug logs contaminate the JSON-RPC stdout channel.

Added prominent warning to Quick Start section explaining:
- Why MCP_MODE=stdio is required
- What happens without it (JSON parse errors)
- How it prevents the issue (suppresses console output)

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

Co-authored-by: Claude Code Assistant <noreply@anthropic.com>
2025-10-27 22:40:44 +01:00
Romuald Członkowski
892c4ed70a Resolve GitHub Issue 292 in n8n-mcp (#375)
* docs: add comprehensive documentation for removing node properties with undefined

Add detailed documentation section for property removal pattern in n8n_update_partial_workflow tool:
- New "Removing Properties with undefined" section explaining the pattern
- Examples showing basic, nested, and batch property removal
- Migration guide for deprecated properties (continueOnFail → onError)
- Best practices for when to use undefined
- Pitfalls to avoid (null vs undefined, mutual exclusivity, etc.)

This addresses the documentation gap reported in issue #292 where users
were confused about how to remove properties during node updates.

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>

* fix: correct array property removal documentation in n8n_update_partial_workflow (Issue #292)

Fixed critical documentation error showing array index notation [0] which doesn't work.
The setNestedProperty implementation treats "headers[0]" as a literal object key, not an array index.

Changes:
- Updated nested property removal section to show entire array removal
- Corrected example rm5 to use "parameters.headers" instead of "parameters.headers[0]"
- Replaced misleading pitfall with accurate warning about array index notation not being supported

Impact:
- Prevents user confusion and non-functional code
- All examples now show correct, working patterns
- Clear warning helps users avoid this mistake

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>

---------

Co-authored-by: Claude <noreply@anthropic.com>
2025-10-26 11:07:30 +01:00
16 changed files with 945 additions and 1767 deletions

View File

@@ -7,6 +7,138 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
## [Unreleased]
## [2.22.9] - 2025-11-04
### 🔄 Dependencies Update
**n8n Platform Update to 1.118.1**
Updated n8n and all related dependencies to the latest versions:
- **n8n**: 1.117.2 → 1.118.1
- **n8n-core**: 1.116.0 → 1.117.0
- **n8n-workflow**: 1.114.0 → 1.115.0
- **@n8n/n8n-nodes-langchain**: 1.116.2 → 1.117.0
### 📊 Database Changes
- Rebuilt node database with **542 nodes**
- 439 nodes from n8n-nodes-base
- 103 nodes from @n8n/n8n-nodes-langchain
- All node metadata synchronized with latest n8n release
### 🐛 Bug Fixes
**n8n 1.118.1+ Compatibility: Fixed versionCounter API Rejection**
Fixed integration test failures caused by n8n 1.118.1 API change where `versionCounter` property is returned in GET responses but rejected in PUT requests.
**Impact**:
- Integration tests were failing with "request/body must NOT have additional properties" error
- Workflow update operations via n8n API were failing
**Solution**:
- Added `versionCounter` to property exclusion list in `cleanWorkflowForUpdate()` (src/services/n8n-validation.ts:136)
- Added `versionCounter?: number` type definition to Workflow and WorkflowExport interfaces
- Added test coverage to prevent regression
### ✅ Verification
- Database rebuild completed successfully
- All node types validated
- Documentation mappings updated
Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en
## [2.22.7] - 2025-10-26
### 📝 Documentation Fixes
**Issue #292: Corrected Array Property Removal Documentation in n8n_update_partial_workflow**
Fixed critical documentation error in property removal patterns that could have led users to write non-functional code.
#### Problem
The documentation incorrectly showed using array index notation `[0]` for removing array elements:
```javascript
// INCORRECT (doesn't work as shown)
updates: { "parameters.headers[0]": undefined }
```
**Root Cause**: The `setNestedProperty` implementation doesn't parse array index notation like `[0]`. It treats `headers[0]` as a literal object key, not an array index.
**Impact**: Users following the documentation would write code that doesn't behave as expected. The property `headers[0]` would be treated as an object key, not an array element reference.
#### Fixed
**Three documentation corrections in `src/mcp/tool-docs/workflow_management/n8n-update-partial-workflow.ts`:**
1. **Nested Property Removal Section** (lines 236-244):
- Changed comment from `// Remove array element` to `// Remove entire array property`
- Changed code from `"parameters.headers[0]": undefined` to `"parameters.headers": undefined`
2. **Example rm5** (line 340):
- Changed comment from `// Remove array element` to `// Remove entire array property`
- Changed code from `"parameters.headers[0]": undefined` to `"parameters.headers": undefined`
3. **Pitfalls Section** (line 405):
- OLD: `'Array element removal with undefined removes the element at that index, which may shift subsequent indices'`
- NEW: `'Array index notation (e.g., "parameters.headers[0]") is not supported - remove the entire array property instead'`
#### Correct Usage
**To remove an array property:**
```javascript
// Correct: Remove entire array
n8n_update_partial_workflow({
id: "wf_012",
operations: [{
type: "updateNode",
nodeName: "HTTP Request",
updates: { "parameters.headers": undefined } // Remove entire headers array
}]
});
```
**NOT:**
```javascript
// Incorrect: Array index notation doesn't work
updates: { "parameters.headers[0]": undefined } // Treated as object key "headers[0]"
```
#### Impact
- **Prevents User Confusion**: Clear documentation on what works vs. what doesn't
- **Accurate Examples**: All examples now show correct, working patterns
- **Better Error Prevention**: Pitfall warning helps users avoid this mistake
- **No Code Changes**: This is purely a documentation fix - no implementation changes needed
#### Testing
- ✅ Documentation reviewed by code-reviewer agent
- ✅ Tested by n8n-mcp-tester agent
- ✅ All examples verified against actual implementation behavior
- ✅ Pitfall accurately describes technical limitation
#### Files Changed
**Documentation (1 file)**:
- `src/mcp/tool-docs/workflow_management/n8n-update-partial-workflow.ts` - Corrected 3 instances of array property removal documentation
**Configuration (2 files)**:
- `package.json` - Version bump to 2.22.7
- `package.runtime.json` - Version bump to 2.22.7
#### Related
- **Issue**: #292 - Missing documentation on how to remove node properties using `updateNode`
- **PR**: #375 - Resolve GitHub Issue 292 in n8n-mcp
- **Code Review**: Identified critical array index notation documentation error
- **Root Cause**: Implementation doesn't parse array bracket notation `[N]`
Conceived by Romuald Członkowski - [www.aiadvisors.pl/en](https://www.aiadvisors.pl/en)
## [2.22.6] - 2025-10-25
### 🐛 Bug Fixes

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@@ -1,5 +1,87 @@
# n8n Update Process - Quick Reference
## ⚡ Recommended Fast Workflow (2025-11-04)
**CRITICAL FIRST STEP**: Check existing releases to avoid version conflicts!
```bash
# 1. CHECK EXISTING RELEASES FIRST (prevents version conflicts!)
gh release list | head -5
# Look at the latest version - your new version must be higher!
# 2. Switch to main and pull
git checkout main && git pull
# 3. Check for updates (dry run)
npm run update:n8n:check
# 4. Run update and skip tests (we'll test in CI)
yes y | npm run update:n8n
# 5. Create feature branch
git checkout -b update/n8n-X.X.X
# 6. Update version in package.json (must be HIGHER than latest release!)
# Edit: "version": "2.XX.X" (not the version from the release list!)
# 7. Update CHANGELOG.md
# - Change version number to match package.json
# - Update date to today
# - Update dependency versions
# 8. Update README badge
# Edit line 8: Change n8n version badge to new n8n version
# 9. Commit and push
git add -A
git commit -m "chore: update n8n to X.X.X and bump version to 2.XX.X
- Updated n8n from X.X.X to X.X.X
- Updated n8n-core from X.X.X to X.X.X
- Updated n8n-workflow from X.X.X to X.X.X
- Updated @n8n/n8n-nodes-langchain from X.X.X to X.X.X
- Rebuilt node database with XXX nodes (XXX from n8n-nodes-base, XXX from @n8n/n8n-nodes-langchain)
- Updated README badge with new n8n version
- Updated CHANGELOG with dependency changes
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>"
git push -u origin update/n8n-X.X.X
# 10. Create PR
gh pr create --title "chore: update n8n to X.X.X" --body "Updates n8n and all related dependencies to the latest versions..."
# 11. After PR is merged, verify release triggered
gh release list | head -1
# If the new version appears, you're done!
# If not, the version might have already been released - bump version again and create new PR
```
### Why This Workflow?
**Fast**: Skip local tests (2-3 min saved) - CI runs them anyway
**Safe**: Unit tests in CI verify compatibility
**Clean**: All changes in one PR with proper tracking
**Automatic**: Release workflow triggers on merge if version is new
### Common Issues
**Problem**: Release workflow doesn't trigger after merge
**Cause**: Version number was already released (check `gh release list`)
**Solution**: Create new PR bumping version by one patch number
**Problem**: Integration tests fail in CI with "unauthorized"
**Cause**: n8n test instance credentials expired (infrastructure issue)
**Solution**: Ignore if unit tests pass - this is not a code problem
**Problem**: CI takes 8+ minutes
**Reason**: Integration tests need live n8n instance (slow)
**Normal**: Unit tests (~2 min) + integration tests (~6 min) = ~8 min total
## Quick One-Command Update
For a complete update with tests and publish preparation:
@@ -99,12 +181,14 @@ This command:
## Important Notes
1. **Always run on main branch** - Make sure you're on main and it's clean
2. **The update script is smart** - It automatically syncs all n8n dependencies to compatible versions
3. **Tests are required** - The publish script now runs tests automatically
4. **Database rebuild is automatic** - The update script handles this for you
5. **Template sanitization is automatic** - Any API tokens in workflow templates are replaced with placeholders
6. **Docker image builds automatically** - Pushing to GitHub triggers the workflow
1. **ALWAYS check existing releases first** - Use `gh release list` to see what versions are already released. Your new version must be higher!
2. **Release workflow only triggers on version CHANGE** - If you merge a PR with an already-released version (e.g., 2.22.8), the workflow won't run. You'll need to bump to a new version (e.g., 2.22.9) and create another PR.
3. **Integration test failures in CI are usually infrastructure issues** - If unit tests pass but integration tests fail with "unauthorized", this is typically because the test n8n instance credentials need updating. The code itself is fine.
4. **Skip local tests - let CI handle them** - Running tests locally adds 2-3 minutes with no benefit since CI runs them anyway. The fast workflow skips local tests.
5. **The update script is smart** - It automatically syncs all n8n dependencies to compatible versions
6. **Database rebuild is automatic** - The update script handles this for you
7. **Template sanitization is automatic** - Any API tokens in workflow templates are replaced with placeholders
8. **Docker image builds automatically** - Pushing to GitHub triggers the workflow
## GitHub Push Protection
@@ -115,11 +199,27 @@ As of July 2025, GitHub's push protection may block database pushes if they cont
3. If push is still blocked, use the GitHub web interface to review and allow the push
## Time Estimate
### Fast Workflow (Recommended)
- Local work: ~2-3 minutes
- npm install and database rebuild: ~2-3 minutes
- File edits (CHANGELOG, README, package.json): ~30 seconds
- Git operations (commit, push, create PR): ~30 seconds
- CI testing after PR creation: ~8-10 minutes (runs automatically)
- Unit tests: ~2 minutes
- Integration tests: ~6 minutes (may fail with infrastructure issues - ignore if unit tests pass)
- Other checks: ~1 minute
**Total hands-on time: ~3 minutes** (then wait for CI)
### Full Workflow with Local Tests
- Total time: ~5-7 minutes
- Test suite: ~2.5 minutes
- npm install and database rebuild: ~2-3 minutes
- The rest: seconds
**Note**: The fast workflow is recommended since CI runs the same tests anyway.
## Troubleshooting
If tests fail:

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@@ -5,23 +5,23 @@
[![npm version](https://img.shields.io/npm/v/n8n-mcp.svg)](https://www.npmjs.com/package/n8n-mcp)
[![codecov](https://codecov.io/gh/czlonkowski/n8n-mcp/graph/badge.svg?token=YOUR_TOKEN)](https://codecov.io/gh/czlonkowski/n8n-mcp)
[![Tests](https://img.shields.io/badge/tests-3336%20passing-brightgreen.svg)](https://github.com/czlonkowski/n8n-mcp/actions)
[![n8n version](https://img.shields.io/badge/n8n-^1.116.2-orange.svg)](https://github.com/n8n-io/n8n)
[![n8n version](https://img.shields.io/badge/n8n-1.118.1-orange.svg)](https://github.com/n8n-io/n8n)
[![Docker](https://img.shields.io/badge/docker-ghcr.io%2Fczlonkowski%2Fn8n--mcp-green.svg)](https://github.com/czlonkowski/n8n-mcp/pkgs/container/n8n-mcp)
[![Deploy on Railway](https://railway.com/button.svg)](https://railway.com/deploy/n8n-mcp?referralCode=n8n-mcp)
A Model Context Protocol (MCP) server that provides AI assistants with comprehensive access to n8n node documentation, properties, and operations. Deploy in minutes to give Claude and other AI assistants deep knowledge about n8n's 525+ workflow automation nodes.
A Model Context Protocol (MCP) server that provides AI assistants with comprehensive access to n8n node documentation, properties, and operations. Deploy in minutes to give Claude and other AI assistants deep knowledge about n8n's 541 workflow automation nodes.
## Overview
n8n-MCP serves as a bridge between n8n's workflow automation platform and AI models, enabling them to understand and work with n8n nodes effectively. It provides structured access to:
- 📚 **536 n8n nodes** from both n8n-nodes-base and @n8n/n8n-nodes-langchain
- 📚 **541 n8n nodes** from both n8n-nodes-base and @n8n/n8n-nodes-langchain
- 🔧 **Node properties** - 99% coverage with detailed schemas
-**Node operations** - 63.6% coverage of available actions
- 📄 **Documentation** - 90% coverage from official n8n docs (including AI nodes)
- 🤖 **AI tools** - 263 AI-capable nodes detected with full documentation
- 📄 **Documentation** - 87% coverage from official n8n docs (including AI nodes)
- 🤖 **AI tools** - 271 AI-capable nodes detected with full documentation
- 💡 **Real-world examples** - 2,646 pre-extracted configurations from popular templates
- 🎯 **Template library** - 2,500+ workflow templates with smart filtering
- 🎯 **Template library** - 2,709 workflow templates with 100% metadata coverage
## ⚠️ Important Safety Warning
@@ -51,6 +51,8 @@ npx n8n-mcp
Add to Claude Desktop config:
> ⚠️ **Important**: The `MCP_MODE: "stdio"` environment variable is **required** for Claude Desktop. Without it, you will see JSON parsing errors like `"Unexpected token..."` in the UI. This variable ensures that only JSON-RPC messages are sent to stdout, preventing debug logs from interfering with the protocol.
**Basic configuration (documentation tools only):**
```json
{
@@ -531,7 +533,7 @@ When operations are independent, execute them in parallel for maximum performanc
❌ BAD: Sequential tool calls (await each one before the next)
### 3. Templates First
ALWAYS check templates before building from scratch (2,500+ available).
ALWAYS check templates before building from scratch (2,709 available).
### 4. Multi-Level Validation
Use validate_node_minimal → validate_node_operation → validate_workflow pattern.
@@ -840,7 +842,7 @@ n8n_update_partial_workflow({
### Core Behavior
1. **Silent execution** - No commentary between tools
2. **Parallel by default** - Execute independent operations simultaneously
3. **Templates first** - Always check before building (2,500+ available)
3. **Templates first** - Always check before building (2,709 available)
4. **Multi-level validation** - Quick check → Full validation → Workflow validation
5. **Never trust defaults** - Explicitly configure ALL parameters
@@ -943,7 +945,7 @@ Once connected, Claude can use these powerful tools:
- **`get_node_as_tool_info`** - Get guidance on using any node as an AI tool
### Template Tools
- **`list_templates`** - Browse all templates with descriptions and optional metadata (2,500+ templates)
- **`list_templates`** - Browse all templates with descriptions and optional metadata (2,709 templates)
- **`search_templates`** - Text search across template names and descriptions
- **`search_templates_by_metadata`** - Advanced filtering by complexity, setup time, services, audience
- **`list_node_templates`** - Find templates using specific nodes
@@ -1098,17 +1100,17 @@ npm run dev:http # HTTP dev mode
## 📊 Metrics & Coverage
Current database coverage (n8n v1.113.3):
Current database coverage (n8n v1.117.2):
- ✅ **536/536** nodes loaded (100%)
- ✅ **528** nodes with properties (98.7%)
- ✅ **470** nodes with documentation (88%)
- ✅ **267** AI-capable tools detected
- ✅ **541/541** nodes loaded (100%)
- ✅ **541** nodes with properties (100%)
- ✅ **470** nodes with documentation (87%)
- ✅ **271** AI-capable tools detected
- ✅ **2,646** pre-extracted template configurations
- ✅ **2,500+** workflow templates available
- ✅ **2,709** workflow templates available (100% metadata coverage)
- ✅ **AI Agent & LangChain nodes** fully documented
- ⚡ **Average response time**: ~12ms
- 💾 **Database size**: ~15MB (optimized)
- 💾 **Database size**: ~68MB (includes templates with metadata)
## 🔄 Recent Updates

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@@ -4,7 +4,9 @@ Connect n8n-MCP to Claude Code CLI for enhanced n8n workflow development from th
## Quick Setup via CLI
### Basic configuration (documentation tools only):
### Basic configuration (documentation tools only)
**For Linux, macOS, or Windows (WSL/Git Bash):**
```bash
claude mcp add n8n-mcp \
-e MCP_MODE=stdio \
@@ -13,9 +15,21 @@ claude mcp add n8n-mcp \
-- npx n8n-mcp
```
**For native Windows PowerShell:**
```powershell
# Note: The backtick ` is PowerShell's line continuation character.
claude mcp add n8n-mcp `
'-e MCP_MODE=stdio' `
'-e LOG_LEVEL=error' `
'-e DISABLE_CONSOLE_OUTPUT=true' `
-- npx n8n-mcp
```
![Adding n8n-MCP server in Claude Code](./img/cc_command.png)
### Full configuration (with n8n management tools):
### Full configuration (with n8n management tools)
**For Linux, macOS, or Windows (WSL/Git Bash):**
```bash
claude mcp add n8n-mcp \
-e MCP_MODE=stdio \
@@ -26,6 +40,18 @@ claude mcp add n8n-mcp \
-- npx n8n-mcp
```
**For native Windows PowerShell:**
```powershell
# Note: The backtick ` is PowerShell's line continuation character.
claude mcp add n8n-mcp `
'-e MCP_MODE=stdio' `
'-e LOG_LEVEL=error' `
'-e DISABLE_CONSOLE_OUTPUT=true' `
'-e N8N_API_URL=https://your-n8n-instance.com' `
'-e N8N_API_KEY=your-api-key' `
-- npx n8n-mcp
```
Make sure to replace `https://your-n8n-instance.com` with your actual n8n URL and `your-api-key` with your n8n API key.
## Alternative Setup Methods
@@ -133,9 +159,11 @@ For optimal results, create a `CLAUDE.md` file in your project root with the ins
## Tips
- If you're running n8n locally, use `http://localhost:5678` as the N8N_API_URL
- The n8n API credentials are optional - without them, you'll have documentation and validation tools only
- With API credentials, you'll get full workflow management capabilities
- Use `--scope local` (default) to keep your API credentials private
- Use `--scope project` to share configuration with your team (put credentials in environment variables)
- Claude Code will automatically start the MCP server when you begin a conversation
- If you're running n8n locally, use `http://localhost:5678` as the `N8N_API_URL`.
- The n8n API credentials are optional. Without them, you'll only have access to documentation and validation tools. With credentials, you get full workflow management capabilities.
- **Scope Management:**
- By default, `claude mcp add` uses `--scope local` (also called "user scope"), which saves the configuration to your global user settings and keeps API keys private.
- To share the configuration with your team, use `--scope project`. This saves the configuration to a `.mcp.json` file in your project's root directory.
- **Switching Scope:** The cleanest method is to `remove` the server and then `add` it back with the desired scope flag (e.g., `claude mcp remove n8n-mcp` followed by `claude mcp add n8n-mcp --scope project`).
- **Manual Switching (Advanced):** You can manually edit your `.claude.json` file (e.g., `C:\Users\YourName\.claude.json`). To switch, cut the `"n8n-mcp": { ... }` block from the top-level `"mcpServers"` object (user scope) and paste it into the nested `"mcpServers"` object under your project's path key (project scope), or vice versa. **Important:** You may need to restart Claude Code for manual changes to take effect.
- Claude Code will automatically start the MCP server when you begin a conversation.

1923
package-lock.json generated

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@@ -1,6 +1,6 @@
{
"name": "n8n-mcp",
"version": "2.22.6",
"version": "2.22.9",
"description": "Integration between n8n workflow automation and Model Context Protocol (MCP)",
"main": "dist/index.js",
"types": "dist/index.d.ts",
@@ -140,15 +140,15 @@
},
"dependencies": {
"@modelcontextprotocol/sdk": "^1.20.1",
"@n8n/n8n-nodes-langchain": "^1.115.1",
"@n8n/n8n-nodes-langchain": "^1.117.0",
"@supabase/supabase-js": "^2.57.4",
"dotenv": "^16.5.0",
"express": "^5.1.0",
"express-rate-limit": "^7.1.5",
"lru-cache": "^11.2.1",
"n8n": "^1.116.2",
"n8n-core": "^1.115.1",
"n8n-workflow": "^1.113.0",
"n8n": "^1.118.1",
"n8n-core": "^1.117.0",
"n8n-workflow": "^1.115.0",
"openai": "^4.77.0",
"sql.js": "^1.13.0",
"tslib": "^2.6.2",

View File

@@ -1,6 +1,6 @@
{
"name": "n8n-mcp-runtime",
"version": "2.22.5",
"version": "2.22.8",
"description": "n8n MCP Server Runtime Dependencies Only",
"private": true,
"dependencies": {

View File

@@ -0,0 +1,99 @@
#!/usr/bin/env ts-node
import * as fs from 'fs';
import * as path from 'path';
import { createDatabaseAdapter } from '../src/database/database-adapter';
interface BatchResponse {
id: string;
custom_id: string;
response: {
status_code: number;
body: {
choices: Array<{
message: {
content: string;
};
}>;
};
};
error: any;
}
async function processBatchMetadata(batchFile: string) {
console.log(`📥 Processing batch file: ${batchFile}`);
// Read the JSONL file
const content = fs.readFileSync(batchFile, 'utf-8');
const lines = content.trim().split('\n');
console.log(`📊 Found ${lines.length} batch responses`);
// Initialize database
const db = await createDatabaseAdapter('./data/nodes.db');
let updated = 0;
let skipped = 0;
let errors = 0;
for (const line of lines) {
try {
const response: BatchResponse = JSON.parse(line);
// Extract template ID from custom_id (format: "template-9100")
const templateId = parseInt(response.custom_id.replace('template-', ''));
// Check for errors
if (response.error || response.response.status_code !== 200) {
console.warn(`⚠️ Template ${templateId}: API error`, response.error);
errors++;
continue;
}
// Extract metadata from response
const metadataJson = response.response.body.choices[0].message.content;
// Validate it's valid JSON
JSON.parse(metadataJson); // Will throw if invalid
// Update database
const stmt = db.prepare(`
UPDATE templates
SET metadata_json = ?
WHERE id = ?
`);
stmt.run(metadataJson, templateId);
updated++;
console.log(`✅ Template ${templateId}: Updated metadata`);
} catch (error: any) {
console.error(`❌ Error processing line:`, error.message);
errors++;
}
}
// Close database
if ('close' in db && typeof db.close === 'function') {
db.close();
}
console.log(`\n📈 Summary:`);
console.log(` - Updated: ${updated}`);
console.log(` - Skipped: ${skipped}`);
console.log(` - Errors: ${errors}`);
console.log(` - Total: ${lines.length}`);
}
// Main
const batchFile = process.argv[2] || '/Users/romualdczlonkowski/Pliki/n8n-mcp/n8n-mcp/docs/batch_68fff7242850819091cfed64f10fb6b4_output.jsonl';
processBatchMetadata(batchFile)
.then(() => {
console.log('\n✅ Batch processing complete!');
process.exit(0);
})
.catch((error) => {
console.error('\n❌ Batch processing failed:', error);
process.exit(1);
});

View File

@@ -186,7 +186,115 @@ Please choose a different name.
- Simply rename nodes with updateNode - no manual connection operations needed
- Multiple renames in one call work atomically
- Can rename a node and add/remove connections using the new name in the same batch
- Use \`validateOnly: true\` to preview effects before applying`,
- Use \`validateOnly: true\` to preview effects before applying
## Removing Properties with undefined
To remove a property from a node, set its value to \`undefined\` in the updates object. This is essential when migrating from deprecated properties or cleaning up optional configuration fields.
### Why Use undefined?
- **Property removal vs. null**: Setting a property to \`undefined\` removes it completely from the node object, while \`null\` sets the property to a null value
- **Validation constraints**: Some properties are mutually exclusive (e.g., \`continueOnFail\` and \`onError\`). Simply setting one without removing the other will fail validation
- **Deprecated property migration**: When n8n deprecates properties, you must remove the old property before the new one will work
### Basic Property Removal
\`\`\`javascript
// Remove error handling configuration
n8n_update_partial_workflow({
id: "wf_123",
operations: [{
type: "updateNode",
nodeName: "HTTP Request",
updates: { onError: undefined }
}]
});
// Remove disabled flag
n8n_update_partial_workflow({
id: "wf_456",
operations: [{
type: "updateNode",
nodeId: "node_abc",
updates: { disabled: undefined }
}]
});
\`\`\`
### Nested Property Removal
Use dot notation to remove nested properties:
\`\`\`javascript
// Remove nested parameter
n8n_update_partial_workflow({
id: "wf_789",
operations: [{
type: "updateNode",
nodeName: "API Request",
updates: { "parameters.authentication": undefined }
}]
});
// Remove entire array property
n8n_update_partial_workflow({
id: "wf_012",
operations: [{
type: "updateNode",
nodeName: "HTTP Request",
updates: { "parameters.headers": undefined }
}]
});
\`\`\`
### Migrating from Deprecated Properties
Common scenario: replacing \`continueOnFail\` with \`onError\`:
\`\`\`javascript
// WRONG: Setting only the new property leaves the old one
n8n_update_partial_workflow({
id: "wf_123",
operations: [{
type: "updateNode",
nodeName: "HTTP Request",
updates: { onError: "continueErrorOutput" }
}]
});
// Error: continueOnFail and onError are mutually exclusive
// CORRECT: Remove the old property first
n8n_update_partial_workflow({
id: "wf_123",
operations: [{
type: "updateNode",
nodeName: "HTTP Request",
updates: {
continueOnFail: undefined,
onError: "continueErrorOutput"
}
}]
});
\`\`\`
### Batch Property Removal
Remove multiple properties in one operation:
\`\`\`javascript
n8n_update_partial_workflow({
id: "wf_345",
operations: [{
type: "updateNode",
nodeName: "Data Processor",
updates: {
continueOnFail: undefined,
alwaysOutputData: undefined,
"parameters.legacy_option": undefined
}
}]
});
\`\`\`
### When to Use undefined
- Removing deprecated properties during migration
- Cleaning up optional configuration flags
- Resolving mutual exclusivity validation errors
- Removing stale or unnecessary node metadata
- Simplifying node configuration`,
parameters: {
id: { type: 'string', required: true, description: 'Workflow ID to update' },
operations: {
@@ -223,7 +331,13 @@ Please choose a different name.
'// Vector Store setup: Connect embeddings and documents\nn8n_update_partial_workflow({id: "ai7", operations: [\n {type: "addConnection", source: "Embeddings OpenAI", target: "Pinecone Vector Store", sourceOutput: "ai_embedding"},\n {type: "addConnection", source: "Default Data Loader", target: "Pinecone Vector Store", sourceOutput: "ai_document"}\n]})',
'// Connect Vector Store Tool to AI Agent (retrieval setup)\nn8n_update_partial_workflow({id: "ai8", operations: [\n {type: "addConnection", source: "Pinecone Vector Store", target: "Vector Store Tool", sourceOutput: "ai_vectorStore"},\n {type: "addConnection", source: "Vector Store Tool", target: "AI Agent", sourceOutput: "ai_tool"}\n]})',
'// Rewire AI Agent to use different language model\nn8n_update_partial_workflow({id: "ai9", operations: [{type: "rewireConnection", source: "AI Agent", from: "OpenAI Chat Model", to: "Anthropic Chat Model", sourceOutput: "ai_languageModel"}]})',
'// Replace all AI tools for an agent\nn8n_update_partial_workflow({id: "ai10", operations: [\n {type: "removeConnection", source: "Old Tool 1", target: "AI Agent", sourceOutput: "ai_tool"},\n {type: "removeConnection", source: "Old Tool 2", target: "AI Agent", sourceOutput: "ai_tool"},\n {type: "addConnection", source: "New HTTP Tool", target: "AI Agent", sourceOutput: "ai_tool"},\n {type: "addConnection", source: "New Code Tool", target: "AI Agent", sourceOutput: "ai_tool"}\n]})'
'// Replace all AI tools for an agent\nn8n_update_partial_workflow({id: "ai10", operations: [\n {type: "removeConnection", source: "Old Tool 1", target: "AI Agent", sourceOutput: "ai_tool"},\n {type: "removeConnection", source: "Old Tool 2", target: "AI Agent", sourceOutput: "ai_tool"},\n {type: "addConnection", source: "New HTTP Tool", target: "AI Agent", sourceOutput: "ai_tool"},\n {type: "addConnection", source: "New Code Tool", target: "AI Agent", sourceOutput: "ai_tool"}\n]})',
'\n// ============ REMOVING PROPERTIES EXAMPLES ============',
'// Remove a simple property\nn8n_update_partial_workflow({id: "rm1", operations: [{type: "updateNode", nodeName: "HTTP Request", updates: {onError: undefined}}]})',
'// Migrate from deprecated continueOnFail to onError\nn8n_update_partial_workflow({id: "rm2", operations: [{type: "updateNode", nodeName: "HTTP Request", updates: {continueOnFail: undefined, onError: "continueErrorOutput"}}]})',
'// Remove nested property\nn8n_update_partial_workflow({id: "rm3", operations: [{type: "updateNode", nodeName: "API Request", updates: {"parameters.authentication": undefined}}]})',
'// Remove multiple properties\nn8n_update_partial_workflow({id: "rm4", operations: [{type: "updateNode", nodeName: "Data Processor", updates: {continueOnFail: undefined, alwaysOutputData: undefined, "parameters.legacy_option": undefined}}]})',
'// Remove entire array property\nn8n_update_partial_workflow({id: "rm5", operations: [{type: "updateNode", nodeName: "HTTP Request", updates: {"parameters.headers": undefined}}]})'
],
useCases: [
'Rewire connections when replacing nodes',
@@ -259,7 +373,11 @@ Please choose a different name.
'Connect language model BEFORE adding AI Agent to ensure validation passes',
'Use targetIndex for fallback models (primary=0, fallback=1)',
'Batch AI component connections in a single operation for atomicity',
'Validate AI workflows after connection changes to catch configuration errors'
'Validate AI workflows after connection changes to catch configuration errors',
'To remove properties, set them to undefined (not null) in the updates object',
'When migrating from deprecated properties, remove the old property and add the new one in the same operation',
'Use undefined to resolve mutual exclusivity validation errors between properties',
'Batch multiple property removals in a single updateNode operation for efficiency'
],
pitfalls: [
'**REQUIRES N8N_API_URL and N8N_API_KEY environment variables** - will not work without n8n API access',
@@ -279,7 +397,12 @@ Please choose a different name.
'**Auto-sanitization behavior**: Binary operators (equals, contains) automatically have singleValue removed; unary operators (isEmpty, isNotEmpty) automatically get singleValue:true added',
'**Auto-sanitization runs on ALL nodes**: When ANY update is made, ALL nodes in the workflow are sanitized (not just modified ones)',
'**Auto-sanitization cannot fix everything**: It fixes operator structures and missing metadata, but cannot fix broken connections or branch mismatches',
'**Corrupted workflows beyond repair**: Workflows in paradoxical states (API returns corrupt, API rejects updates) cannot be fixed via API - must be recreated'
'**Corrupted workflows beyond repair**: Workflows in paradoxical states (API returns corrupt, API rejects updates) cannot be fixed via API - must be recreated',
'Setting a property to null does NOT remove it - use undefined instead',
'When properties are mutually exclusive (e.g., continueOnFail and onError), setting only the new property will fail - you must remove the old one with undefined',
'Removing a required property may cause validation errors - check node documentation first',
'Nested property removal with dot notation only removes the specific nested field, not the entire parent object',
'Array index notation (e.g., "parameters.headers[0]") is not supported - remove the entire array property instead'
],
relatedTools: ['n8n_update_full_workflow', 'n8n_get_workflow', 'validate_workflow', 'tools_documentation']
}

View File

@@ -75,10 +75,15 @@ async function fetchTemplatesRobust() {
// Fetch detail
const detail = await fetcher.fetchTemplateDetail(template.id);
// Save immediately
repository.saveTemplate(template, detail);
saved++;
if (detail !== null) {
// Save immediately
repository.saveTemplate(template, detail);
saved++;
} else {
errors++;
console.error(`\n❌ Failed to fetch template ${template.id} (${template.name}) after retries`);
}
// Rate limiting
await new Promise(resolve => setTimeout(resolve, 200));

View File

@@ -133,6 +133,7 @@ export function cleanWorkflowForUpdate(workflow: Workflow): Partial<Workflow> {
createdAt,
updatedAt,
versionId,
versionCounter, // Added: n8n 1.118.1+ returns this but rejects it in updates
meta,
staticData,
// Remove fields that cause API errors

View File

@@ -40,7 +40,37 @@ export interface TemplateDetail {
export class TemplateFetcher {
private readonly baseUrl = 'https://api.n8n.io/api/templates';
private readonly pageSize = 250; // Maximum allowed by API
private readonly maxRetries = 3;
private readonly retryDelay = 1000; // 1 second base delay
/**
* Retry helper for API calls
*/
private async retryWithBackoff<T>(
fn: () => Promise<T>,
context: string,
maxRetries: number = this.maxRetries
): Promise<T | null> {
let lastError: any;
for (let attempt = 1; attempt <= maxRetries; attempt++) {
try {
return await fn();
} catch (error: any) {
lastError = error;
if (attempt < maxRetries) {
const delay = this.retryDelay * attempt; // Exponential backoff
logger.warn(`${context} - Attempt ${attempt}/${maxRetries} failed, retrying in ${delay}ms...`);
await this.sleep(delay);
}
}
}
logger.error(`${context} - All ${maxRetries} attempts failed, skipping`, lastError);
return null;
}
/**
* Fetch all templates and filter to last 12 months
* This fetches ALL pages first, then applies date filter locally
@@ -73,93 +103,105 @@ export class TemplateFetcher {
let page = 1;
let hasMore = true;
let totalWorkflows = 0;
logger.info('Starting complete template fetch from n8n.io API');
while (hasMore) {
try {
const response = await axios.get(`${this.baseUrl}/search`, {
params: {
page,
rows: this.pageSize
// Note: sort_by parameter doesn't work, templates come in popularity order
}
});
const { workflows } = response.data;
totalWorkflows = response.data.totalWorkflows || totalWorkflows;
allTemplates.push(...workflows);
// Calculate total pages for better progress reporting
const totalPages = Math.ceil(totalWorkflows / this.pageSize);
if (progressCallback) {
// Enhanced progress with page information
progressCallback(allTemplates.length, totalWorkflows);
}
logger.debug(`Fetched page ${page}/${totalPages}: ${workflows.length} templates (total so far: ${allTemplates.length}/${totalWorkflows})`);
// Check if there are more pages
if (workflows.length < this.pageSize) {
hasMore = false;
}
const result = await this.retryWithBackoff(
async () => {
const response = await axios.get(`${this.baseUrl}/search`, {
params: {
page,
rows: this.pageSize
// Note: sort_by parameter doesn't work, templates come in popularity order
}
});
return response.data;
},
`Fetching templates page ${page}`
);
if (result === null) {
// All retries failed for this page, skip it and continue
logger.warn(`Skipping page ${page} after ${this.maxRetries} failed attempts`);
page++;
// Rate limiting - be nice to the API (slightly faster with 250 rows/page)
if (hasMore) {
await this.sleep(300); // 300ms between requests (was 500ms with 100 rows)
}
} catch (error) {
logger.error(`Error fetching templates page ${page}:`, error);
throw error;
continue;
}
const { workflows } = result;
totalWorkflows = result.totalWorkflows || totalWorkflows;
allTemplates.push(...workflows);
// Calculate total pages for better progress reporting
const totalPages = Math.ceil(totalWorkflows / this.pageSize);
if (progressCallback) {
// Enhanced progress with page information
progressCallback(allTemplates.length, totalWorkflows);
}
logger.debug(`Fetched page ${page}/${totalPages}: ${workflows.length} templates (total so far: ${allTemplates.length}/${totalWorkflows})`);
// Check if there are more pages
if (workflows.length < this.pageSize) {
hasMore = false;
}
page++;
// Rate limiting - be nice to the API (slightly faster with 250 rows/page)
if (hasMore) {
await this.sleep(300); // 300ms between requests (was 500ms with 100 rows)
}
}
logger.info(`Fetched all ${allTemplates.length} templates from n8n.io`);
return allTemplates;
}
async fetchTemplateDetail(workflowId: number): Promise<TemplateDetail> {
try {
const response = await axios.get(`${this.baseUrl}/workflows/${workflowId}`);
return response.data.workflow;
} catch (error) {
logger.error(`Error fetching template detail for ${workflowId}:`, error);
throw error;
}
async fetchTemplateDetail(workflowId: number): Promise<TemplateDetail | null> {
const result = await this.retryWithBackoff(
async () => {
const response = await axios.get(`${this.baseUrl}/workflows/${workflowId}`);
return response.data.workflow;
},
`Fetching template detail for workflow ${workflowId}`
);
return result;
}
async fetchAllTemplateDetails(
workflows: TemplateWorkflow[],
workflows: TemplateWorkflow[],
progressCallback?: (current: number, total: number) => void
): Promise<Map<number, TemplateDetail>> {
const details = new Map<number, TemplateDetail>();
let skipped = 0;
logger.info(`Fetching details for ${workflows.length} templates`);
for (let i = 0; i < workflows.length; i++) {
const workflow = workflows[i];
try {
const detail = await this.fetchTemplateDetail(workflow.id);
const detail = await this.fetchTemplateDetail(workflow.id);
if (detail !== null) {
details.set(workflow.id, detail);
if (progressCallback) {
progressCallback(i + 1, workflows.length);
}
// Rate limiting (conservative to avoid API throttling)
await this.sleep(150); // 150ms between requests
} catch (error) {
logger.error(`Failed to fetch details for workflow ${workflow.id}:`, error);
// Continue with other templates
} else {
skipped++;
logger.warn(`Skipped workflow ${workflow.id} after ${this.maxRetries} failed attempts`);
}
if (progressCallback) {
progressCallback(i + 1, workflows.length);
}
// Rate limiting (conservative to avoid API throttling)
await this.sleep(150); // 150ms between requests
}
logger.info(`Successfully fetched ${details.size} template details`);
logger.info(`Successfully fetched ${details.size} template details (${skipped} skipped)`);
return details;
}

View File

@@ -496,10 +496,17 @@ export class TemplateRepository {
// Count node usage
const nodeCount: Record<string, number> = {};
topNodes.forEach(t => {
const nodes = JSON.parse(t.nodes_used);
nodes.forEach((n: string) => {
nodeCount[n] = (nodeCount[n] || 0) + 1;
});
if (!t.nodes_used) return;
try {
const nodes = JSON.parse(t.nodes_used);
if (Array.isArray(nodes)) {
nodes.forEach((n: string) => {
nodeCount[n] = (nodeCount[n] || 0) + 1;
});
}
} catch (error) {
logger.warn(`Failed to parse nodes_used for template stats:`, error);
}
});
// Get top 10 most used nodes

View File

@@ -66,6 +66,7 @@ export interface Workflow {
updatedAt?: string;
createdAt?: string;
versionId?: string;
versionCounter?: number; // Added: n8n 1.118.1+ returns this in GET responses
meta?: {
instanceId?: string;
};
@@ -152,6 +153,7 @@ export interface WorkflowExport {
tags?: string[];
pinData?: Record<string, unknown>;
versionId?: string;
versionCounter?: number; // Added: n8n 1.118.1+
meta?: Record<string, unknown>;
}

View File

@@ -313,6 +313,7 @@ describe('n8n-validation', () => {
createdAt: '2023-01-01',
updatedAt: '2023-01-01',
versionId: 'v123',
versionCounter: 5, // n8n 1.118.1+ field
meta: { test: 'data' },
staticData: { some: 'data' },
pinData: { pin: 'data' },
@@ -333,6 +334,7 @@ describe('n8n-validation', () => {
expect(cleaned).not.toHaveProperty('createdAt');
expect(cleaned).not.toHaveProperty('updatedAt');
expect(cleaned).not.toHaveProperty('versionId');
expect(cleaned).not.toHaveProperty('versionCounter'); // n8n 1.118.1+ compatibility
expect(cleaned).not.toHaveProperty('meta');
expect(cleaned).not.toHaveProperty('staticData');
expect(cleaned).not.toHaveProperty('pinData');
@@ -349,6 +351,22 @@ describe('n8n-validation', () => {
expect(cleaned.settings).toEqual({ executionOrder: 'v1' });
});
it('should exclude versionCounter for n8n 1.118.1+ compatibility', () => {
const workflow = {
name: 'Test Workflow',
nodes: [],
connections: {},
versionId: 'v123',
versionCounter: 5, // n8n 1.118.1 returns this but rejects it in PUT
} as any;
const cleaned = cleanWorkflowForUpdate(workflow);
expect(cleaned).not.toHaveProperty('versionCounter');
expect(cleaned).not.toHaveProperty('versionId');
expect(cleaned.name).toBe('Test Workflow');
});
it('should add empty settings object for cloud API compatibility', () => {
const workflow = {
name: 'Test Workflow',