Audit & Build Custom n8n Nodes from GitHub with Claude + MCP

Turn a GitHub repo into a custom n8n node—automatically

This webhook-driven workflow audits your provided GitHub repositories and documentation, then generates, builds, tests, and security-scans a custom TypeScript n8n node using Claude, GitHub MCP, and a documentation/package MCP—so you can ship working n8n extensions faster.

What this workflow does

• Receives a POST webhook request with a natural-language requirement plus optional repository, library, and documentation links.
• Normalizes and validates input, returning a structured failure response if required details (like the node requirement or repo/library references) are missing.
• Converts your requirement into a structured spec with Anthropic Claude.
• Investigates your codebases via GitHub MCP to extract repo metadata and dependencies.
• Builds a dependency graph and uses Claude with a Documentation/Package MCP to resolve API/SDK details required for the node.
• Designs the n8n node specification, then generates matching TypeScript source files and unit tests.
• Writes files to a filesystem MCP workspace and runs a sandbox build/lint/test job.
• Auto-repair loop: it retries the generation cycle with Claude until tests pass or attempt limits are reached.
• Runs a sandbox security scan, then packages the node artifact for use in your n8n environment.

Use cases

• Create a custom n8n node for a GitHub-hosted API/client when existing n8n nodes don’t fit.
• Audit and verify a node implementation by generating unit tests and iterating until the build passes.
• Accelerate SaaS automation engineering by turning repo + docs into deployable n8n node artifacts.

Technical details

• Integrations/AI: Anthropic Claude, GitHub MCP, Documentation/Package MCP, filesystem MCP workspace, sandbox security scanning.
• n8n workflow nodes: if, set, code, no op, merge, webhook.