Files
n8n-mcp/docs
czlonkowski cfe3c5e584 fix: Phase 0 critical connection operation fixes (Issue #272, #204)
## Critical Bugs Fixed

### 1. addConnection sourceIndex Bug
- Multi-output nodes (IF, Switch) now work correctly
- Changed || to ?? for proper 0 handling
- Added defensive array validation
- Improves multi-output node rating from 3/10 to 8/10

### 2. updateConnection Runtime Validation
- Prevents crashes when 'updates' object missing
- Provides helpful error with examples and suggestions
- Validates updates is an object type
- Fixes server crashes from malformed AI requests

## Testing
- Added 8 comprehensive tests (all passing)
- Covers updateConnection validation (2 tests)
- Covers sourceIndex handling (5 tests)
- Complex multi-output scenarios (1 test)
- All 126 tests passing (91.16% coverage)

## Documentation
- Updated tool docs with Phase 0 fix notes
- Added pitfalls about updateConnection limitations
- Enhanced CHANGELOG with detailed fix descriptions
- References hands-on testing analysis

## Impact
- Based on n8n-mcp-tester hands-on testing
- Overall rating improved from 4.5/10 to 6/10
- Resolves Issue #272 (updateConnection confusion)
- Resolves Issue #204 (server crashes)

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

Co-Authored-By: Claude <noreply@anthropic.com>
2025-10-05 22:05:51 +02:00
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n8n-MCP Documentation

Welcome to the n8n-MCP documentation. This directory contains comprehensive guides for installation, configuration, and troubleshooting.

📚 Documentation Index

Getting Started

Deployment

Reference

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

  1. Check the Troubleshooting Guide
  2. Review HTTP Server Fix Documentation for v2.3.2 issues
  3. Open an issue on GitHub

📝 License

This project uses the Sustainable Use License. See LICENSE for details.