Release v2.13.0

Added

• Webhook Path Autofixer: Automatically generates UUIDs for webhook nodes missing path configuration

  • Generates unique UUID for both path parameter and webhookId field
  • Conditionally updates typeVersion to 2.1 only when < 2.1 to ensure compatibility
  • High confidence fix (95%) as UUID generation is deterministic
  • Resolves webhook nodes showing "?" in the n8n UI

• Enhanced Node Type Suggestions: Intelligent node type correction with similarity matching

  • Multi-factor scoring system: name similarity, category match, package match, pattern match
  • Handles deprecated package prefixes (n8n-nodes-base. → nodes-base.)
  • Corrects capitalization mistakes (HttpRequest → httpRequest)
  • Suggests correct packages (nodes-base.openai → nodes-langchain.openAi)
  • Only auto-fixes suggestions with ≥90% confidence
  • 5-minute cache for performance optimization

• n8n_autofix_workflow Tool: New MCP tool for automatic workflow error correction

  • Comprehensive documentation with examples and best practices
  • Supports 5 fix types: expression-format, typeversion-correction, error-output-config, node-type-correction, webhook-missing-path
  • Confidence-based system (high/medium/low) for safe fixes
  • Preview mode to review changes before applying
  • Integrated with workflow validation pipeline

Fixed

• Security: Eliminated ReDoS vulnerability in NodeSimilarityService

  • Replaced all regex patterns with string-based matching
  • No performance impact while maintaining accuracy

• Performance: Optimized similarity matching algorithms

  • Levenshtein distance algorithm optimized from O(m*n) space to O(n)
  • Added early termination for performance improvement
  • Cache invalidation with version tracking prevents memory leaks

• Code Quality: Improved maintainability and type safety

  • Extracted magic numbers into named constants
  • Added proper type guards for runtime safety
  • Created centralized node-type-utils for consistent type normalization
  • Fixed silent failures in setNestedValue operations

Changed

• Template sanitizer now includes defensive null checks for runtime safety
• Workflow validator uses centralized type normalization utility

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:v2.13.0

# Railway optimized
docker run -p 3000:3000 ghcr.io/czlonkowski/n8n-mcp-railway:v2.13.0

Documentation

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

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