Us Legal MCP

🚀 🇺🇸 US Legal MCP Server

A comprehensive Model Context Protocol (MCP) server for US legal data, providing access to Congress bills, Federal Register documents, court opinions, and committee data.

✨ Features

📜 Congress.gov Integration

• Search bills and resolutions.
• Retrieve recent legislation.
• Obtain committee information.
• Access real - time legislative data.

📋 Federal Register Integration

• Search regulations and executive orders.
• Get recent agency documents.
• Access full document text and metadata.

⚖️ CourtListener Integration

• Search court opinions (federal and state courts).
• Retrieve recent court decisions.
• Access Supreme Court, appellate, and state court data.
• Get full case text and metadata.

🗳️ Congress Committees

• Obtain committee information.
• Filter by chamber (House/Senate).
• Track legislative activity.

🚀 Quick Start

📦 Installation

npm install
npm run build

⚙️ Environment Variables (Optional)

# For enhanced Congress.gov access (free tier available)
export CONGRESS_API_KEY="your_congress_api_key"

# For CourtListener API access (free tier available)
export COURT_LISTENER_API_KEY="your_court_listener_api_key"

▶️ Running the Server

npm start

🛠️ MCP Configuration (Cursor/Claude)

To use this MCP server with Cursor or Claude Desktop, add the following configuration:

For Cursor

Create or edit ~/.cursor/mcp.json (or your Cursor MCP config location):

{
  "mcpServers": {
    "us-legal-mcp": {
      "command": "node",
      "args": ["/absolute/path/to/legal-mcp/dist/index.js"],
      "env": {
        "CONGRESS_API_KEY": "",
        "COURT_LISTENER_API_KEY": "258021eb4dd1901f1acfdb3f521fb8a7837a9097"
      }
    }
  }
}

⚠️ Important Note

Replace /absolute/path/to/legal-mcp with your actual project path.

For Claude Desktop

Edit ~/Library/Application Support/Claude/claude_desktop_config.json (macOS):

{
  "mcpServers": {
    "us-legal-mcp": {
      "command": "node",
      "args": ["/absolute/path/to/legal-mcp/dist/index.js"],
      "env": {
        "CONGRESS_API_KEY": "",
        "COURT_LISTENER_API_KEY": "258021eb4dd1901f1acfdb3f521fb8a7837a9097"
      }
    }
  }
}

See mcp-config-example.json in this repository for a reference configuration.

💻 Available Tools

search-congress-bills

Search for bills and resolutions in Congress.gov.

• Query: Search terms (e.g., "immigration", "healthcare").
• Congress: Optional Congress number (100 - 120).
• Limit: Number of results (1 - 50).

search-federal-register

Search Federal Register documents (regulations, executive orders).

• Query: Search terms.
• Limit: Number of results (1 - 50).

search-all-legal

Comprehensive search across all working sources (Congress Bills, Federal Register, Court Opinions).

• Query: Search terms.
• Limit: Results per source (1 - 50).

get-recent-bills

Get recently introduced bills.

• Congress: Optional Congress number.
• Limit: Number of results (1 - 50).

get-recent-regulations

Get recently published Federal Register documents.

• Limit: Number of results (1 - 50).

search-court-opinions

Search for court opinions and decisions.

• Query: Search terms (e.g., "constitutional", "copyright").
• Court: Optional court filter (e.g., "scotus", "ca1", "ca2").
• Limit: Number of results (1 - 50).

get-recent-court-opinions

Get the most recently published court opinions.

• Court: Optional court filter.
• Limit: Number of results (1 - 50).

get-congress-committees

Get list of Congressional committees.

• Congress: Optional Congress number (100 - 120).
• Chamber: Optional filter ("House" or "Senate").

📊 Data Sources

⚠️ Important Note

US Code and Regulations.gov integrations were removed due to persistent API reliability issues.

🔑 API Keys

Congress.gov API Key (Optional)

1. Visit https://api.congress.gov/.
2. Sign up for a free account.
3. Get your API key.
4. Set CONGRESS_API_KEY environment variable.

CourtListener API Key (Optional)

1. Visit https://www.courtlistener.com/api/.
2. Create a free account.
3. Get your API key from your profile.
4. Set COURT_LISTENER_API_KEY environment variable.

💡 Usage Tip

A pre - configured API key is included in the example MCP config file for quick setup.

💻 Example Usage

Search for Immigration Bills

{
  "tool": "search-congress-bills",
  "arguments": {
    "query": "immigration",
    "congress": 118,
    "limit": 10
  }
}

Search Federal Regulations

{
  "tool": "search-federal-register",
  "arguments": {
    "query": "environmental protection",
    "limit": 5
  }
}

Comprehensive Legal Search

{ 
  "tool": "search-all-legal",
  "arguments": {
    "query": "healthcare",
    "limit": 20
  }
}

Search Court Opinions

{
  "tool": "search-court-opinions",
  "arguments": {
    "query": "immigration asylum",
    "court": "scotus",
    "limit": 10
  }
}

Get Congressional Committees

{
  "tool": "get-congress-committees",
  "arguments": {
    "congress": 119,
    "chamber": "Senate"
  }
}

💸 Donate

If you find this project useful, consider supporting it with Bitcoin:

⚡ Lightning Network

lnbc1pjhhsqepp5mjgwnvg0z53shm22hfe9us289lnaqkwv8rn2s0rtekg5vvj56xnqdqqcqzzsxqyz5vqsp5gu6vh9hyp94c7t3tkpqrp2r059t4vrw7ps78a4n0a2u52678c7yq9qyyssq7zcferywka50wcy75skjfrdrk930cuyx24rg55cwfuzxs49rc9c53mpz6zug5y2544pt8y9jflnq0ltlha26ed846jh0y7n4gm8jd3qqaautqa

₿ On - Chain

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Ξ Ethereum / EVM Networks

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💡 Usage Tip

Donations from any EVM - compatible network (Ethereum, Polygon, Arbitrum, Optimism, BSC, Avalanche, etc.) will work perfectly! You can also send tokens like USDT, USDC, DAI, and other ERC - 20 tokens to this address.

📄 License

MIT License - see LICENSE file for details.

🤝 Contributing

Contributions welcome! Please read the contributing guidelines and submit pull requests.