Xpath Expression 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.

Execute XPath queries on XML and HTML content effortlessly. Fetch and query data from URLs or local XML, returning results in a structured format. Enhance your applications with powerful XML data manipulation capabilities.

Unique: Employs a dedicated syntax-checking engine specifically designed for XPath, allowing for immediate feedback on query validity.

vs others: Offers more comprehensive validation than standard XPath libraries, which often lack pre-execution checks.

via “expression-syntax-validation-and-error-reporting”

expression-editor — AI demo on HuggingFace

Unique: Leverages an LLM to generate contextual, human-friendly error messages rather than cryptic parser error codes, making it more accessible to non-programmers while maintaining technical accuracy.

vs others: More user-friendly error reporting than traditional regex-based validators or compiler error messages, but less precise than a formal grammar-based parser with explicit error recovery rules.