v2.0.0 — Open Source Release

CongressMCP v2.0.0 — Free & Open Source

CongressMCP is now a free, open-source, local-first MCP server. No hosted service, no API keys from us, no payments.

What's New

• Local-first: Runs entirely on your machine via uvx congressmcp
• 91+ tools across 6 toolsets: Bills, Members, Committees, Amendments, Nominations, Treaties
• All MCP clients: Claude Desktop, VS Code, Cursor, and any MCP-compatible client
• Self-hostable: Optional remote mode via --transport streamable-http
• Streamable HTTP transport: Modern MCP transport support

What's Removed

• Hosted server (Heroku)
• Authentication & API key management (Supabase)
• Payment processing (Stripe)
• NPM bridge package (deprecated)

Install

uvx congressmcp

Quick Setup

1. Get a free Congress.gov API key
2. Add to your MCP client config with CONGRESS_API_KEY env var
3. Start asking your AI about legislation

See the full setup guide or README.