LegisMCP - Open-Source Legislative MCP Server

An open-source Model Context Protocol (MCP) server that provides AI agents with real-time access to U.S. legislative data from Congress.gov.

Quick Start

A Congress.gov API key is required. Get a free one at api.congress.gov/sign-up.

Claude Desktop / Cursor / Windsurf

Add to your MCP configuration:

{
  "mcpServers": {
    "legismcp": {
      "command": "npx",
      "args": ["-y", "legismcp"],
      "env": {
        "CONGRESS_API_KEY": "your-api-key"
      }
    }
  }
}

That's it — no cloning or installing required.

Remote Connection

Connect via the hosted endpoint — no local installation needed:

{
  "mcpServers": {
    "legismcp": {
      "type": "http",
      "url": "https://mcp.legismcp.com/mcp",
      "headers": {
        "X-Congress-API-Key": "your-api-key"
      }
    }
  }
}

Available Tools

Tool	Description
get-bill	Get detailed information about a specific bill
list-recent-bills	List recent bills with filtering by congress, sort, and pagination
analyze-bill	Comprehensive analysis of a bill's content, impact, and implications
trending-bills	Get trending legislative activity by timeframe and category
member-details	Get details about a specific member of Congress by bioguide ID
member-search	Search for members by name, state, or party
subresource	Access bill sub-resources (actions, amendments, cosponsors, etc.)

Example Queries

Once connected, ask your AI agent:

• "What bills were introduced this week about healthcare?"
• "Show me the details of HR 1234 from the 118th Congress"
• "Who are the senators from California?"
• "What's trending in Congress right now?"
• "Analyze the CHIPS Act and its economic implications"

Environment Variables

Variable	Required	Description
CONGRESS_API_KEY	Yes	Congress.gov API key (get one free)

Architecture

AI Agent <-> MCP Server <-> Congress.gov API
              (stdio)

• Runs as a local Node.js process, communicates via stdin/stdout
• Data source: Congress.gov API

License

MIT - See LICENSE