Release v2.12.1

Fixed

• Error Output Validation: Enhanced workflow validator to detect incorrect error output configurations
  • Detects when multiple nodes are incorrectly placed in the same output array (main[0])
  • Validates that error handlers are properly connected to main[1] (error output) instead of main[0]
  • Cross-validates onError property ('continueErrorOutput') matches actual connection structure
  • Provides clear, actionable error messages with JSON examples showing correct configuration
  • Uses heuristic detection for error handler nodes (names containing "error", "fail", "catch", etc.)
  • Added comprehensive test coverage with 16+ test cases

Improved

• Validation Messages: Error messages now include detailed JSON examples showing both incorrect and correct configurations
• Pattern Detection: Fixed checkWorkflowPatterns to check main[1] for error outputs instead of non-existent outputs.error
• Test Coverage: Added new test file workflow-validator-error-outputs.test.ts with extensive error output validation scenarios

Installation

NPM Package

# Install globally
npm install -g n8n-mcp

# Or run directly
npx n8n-mcp

Docker

# Standard image
docker run -p 3000:3000 ghcr.io/czlonkowski/n8n-mcp:v2.12.1

# Railway optimized
docker run -p 3000:3000 ghcr.io/czlonkowski/n8n-mcp-railway:v2.12.1

Documentation

• Installation Guide
• Docker Deployment
• n8n Integration
• Complete Changelog

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