Structured Error Reporting With Expression Syntax Validation

via “expression language validation and syntax checking”

A MCP for Claude Desktop / Claude Code / Windsurf / Cursor to build n8n workflows for you

Unique: Dedicated expression validator that understands n8n's custom expression syntax (referenced in DeepWiki as 'Expression Validation'), including special functions ($json, $env, $now, $nodeInputData, etc.) and context-aware variable resolution. Provides detailed error reporting with position information for IDE integration.

vs others: More accurate than regex-based validation because it parses the full expression grammar; more helpful than n8n's runtime errors because it provides feedback before execution.