CongressMCP

CongressMCP MCP Server

Single Streamable HTTP MCP endpoint (JSON-RPC 2.0 over POST) over CongressMCP's independently operated federal and 50-state legislative data snapshot; the docs say it starts with fifty-six research tools (bill, member and vote context, state bills, legislators and votes, dataset query/search) and expands to 221 tools with workspace, automation and Watch Mode permissions. Auth is OAuth 2.1 with PKCE or a Bearer sk_live_ API key; anonymous tools/list returns 401.

GitHub

Documentation

📖
Documentation
https://congressmcp.com/docs
📖
GettingStarted
https://congressmcp.com/connect

Other Resources

🔗
APIsJSON
https://artifacts.apis.io/congressmcp-com/apis.yml

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API 
curl "https://apis.io/api/v1/apis/congressmcp-com:congressmcp-mcp-server"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

API entry from apis.yml

apis.yml Raw ↑ 
name: CongressMCP MCP Server
description: Single Streamable HTTP MCP endpoint (JSON-RPC 2.0 over POST) over CongressMCP's independently
  operated federal and 50-state legislative data snapshot; the docs say it starts with fifty-six research
  tools (bill, member and vote context, state bills, legislators and votes, dataset query/search) and
  expands to 221 tools with workspace, automation and Watch Mode permissions. Auth is OAuth 2.1 with PKCE
  or a Bearer sk_live_ API key; anonymous tools/list returns 401.
humanURL: https://congressmcp.com/docs
baseURL: https://www.congressmcp.com/mcp
tags:
- MCP
- Legislation
tags_raw:
- Model Context Protocol
- Legislation
properties:
- type: Documentation
  url: https://congressmcp.com/docs
- type: GettingStarted
  url: https://congressmcp.com/connect
aid: congressmcp-com:congressmcp-mcp-server