The Congress.gov MCP server is an unofficial MCP (Model Context Protocol) implementation that enables clients like Claude Desktop and Claude Code to query real-time data from the United States Congress via the official Congress.gov API. It provides a runnable server (server.py) that you can launch with uv and connect through your MCP client. The repository includes Smithery-based installation and a manual setup workflow, requiring an API key from Congress.gov and a compatible MCP client. Key setup steps include cloning the repository, syncing dependencies with uv, and creating a .env file containing CONGRESS_GOV_API_KEY. The README also includes configuration templates for Claude Desktop and Claude Code so you can point clients at the server and run it with uv using a specified script. The roadmap lists implemented Congress.gov resources (bills, amendments, summaries, congress, members, committees, and related materials) as well as planned endpoints, providing transparency into current capabilities and upcoming work.