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MCP Server Builder

Point it at any API docs URL. Three chained AI agents read the docs, select the best endpoints, and write a fully installable Python MCP server — automatically.

WHAT IT DOES

Any API, turned into a Claude tool.

  • Reads raw API documentation — no manual endpoint mapping required
  • Selects the most useful endpoints and writes typed Python tool functions
  • Output installs directly into Claude Code with a single command
THE PIPELINE

Three agents, one output.

  1. Doc Reader

    Scrapes the API documentation URL with Firecrawl, extracts available endpoints, and passes a structured summary to the next agent.

  2. Tool Planner

    Reviews the endpoint list and selects the subset most useful for an AI assistant — filtering out low-value or redundant operations.

  3. Code Writer

    Generates a complete FastMCP Python server with typed functions, docstrings, and error handling — ready to install with pip install fastmcp.

WATCH IT RUN

See the full pipeline live.

I run it live against the Hacker News API — no cuts, no prep. Three agents fire in sequence, and a working MCP server comes out the other side in under a minute.

▶ Watch on YouTube
UNDER THE HOOD

Built on Trigger.dev.

MCP Server Builder pipeline running in Trigger.dev — three chained tasks visible with timing and output
Doc Reader
Tool Planner
Code Writer

Built on Trigger.dev v3 with Claude Sonnet 4.6, Firecrawl, and FastMCP

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