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Major Features: - Add ExpressionValidator for n8n expression syntax validation - Add WorkflowValidator for complete workflow structure validation - Add three new MCP tools: validate_workflow, validate_workflow_connections, validate_workflow_expressions Validation Capabilities: - ✅ Detects workflow cycles (infinite loops) - ✅ Validates n8n expressions with syntax checking - ✅ Checks node references in expressions - ✅ Identifies orphaned nodes and missing connections - ✅ Supports multiple node type formats (n8n-nodes-base, @n8n/n8n-nodes-langchain) - ✅ Provides actionable error messages and suggestions Testing & Analysis: - Add test scripts for workflow validation - Add template validation testing - Add validation summary analysis tool - Fixed expression validation false positives - Handle node type normalization correctly Results from testing 50 real n8n templates: - 70.9% of errors are from informal sticky notes - Expression validation catches real syntax issues - Cycle detection prevents runtime infinite loops - Successfully validates both core and LangChain nodes 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
n8n-MCP Documentation
Welcome to the n8n-MCP documentation. This directory contains comprehensive guides for installation, configuration, and troubleshooting.
📚 Documentation Index
Getting Started
- Installation Guide - Comprehensive installation guide covering all methods
- Claude Desktop Setup - Step-by-step guide for Claude Desktop configuration
- Quick Start Tutorial - Basic overview and quick start instructions
Deployment
- HTTP Deployment Guide - Deploy n8n-MCP as an HTTP server for remote access
- Docker Deployment - Complete Docker deployment and configuration guide
- Release Guide - How to create releases and manage Docker tags
Reference
- Troubleshooting Guide - Solutions for common issues and errors
- HTTP Server Fix Documentation - Technical details of v2.3.2 HTTP server fixes
- Docker Optimization Guide - Reference for optimized Docker builds (~150MB)
- Changelog - Version history and release notes
🚀 Quick Links
For Users
For Developers
📋 Environment Variables
Key configuration options:
| Variable | Description | Default |
|---|---|---|
MCP_MODE |
Server mode: stdio or http |
stdio |
USE_FIXED_HTTP |
Use fixed HTTP implementation (v2.3.2+) | true |
AUTH_TOKEN |
Authentication token for HTTP mode | Required |
PORT |
HTTP server port | 3000 |
LOG_LEVEL |
Logging verbosity | info |
See Installation Guide for complete list.
🆘 Getting Help
- Check the Troubleshooting Guide
- Review HTTP Server Fix Documentation for v2.3.2 issues
- Open an issue on GitHub
📝 License
This project uses the Sustainable Use License. See LICENSE for details.