🇺🇸 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
Get recent legislation
Get committee information
Real-time legislative data

📋 Federal Register Integration

Search regulations and executive orders
Get recent agency documents
Full document text and metadata

⚖️ CourtListener Integration

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

🗳️ Congress Committees

Get committee information
Filter by chamber (House/Senate)
Legislative activity tracking

🚀 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: 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

Source	Description	API	Auth Required	Status
Congress.gov	Bills, resolutions, committees	https://api.congress.gov/v3	Optional	✅
Federal Register	Regulations, executive orders	https://www.federalregister.gov/api/v1	No	✅
CourtListener	Court opinions, decisions	https://www.courtlistener.com/api/	Optional	✅

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

🔑 API Keys

Congress.gov API Key (Optional)

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

CourtListener API Key (Optional)

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

Note: 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" } }

📝 License

MIT License - see LICENSE file for details.

🤝 Contributing

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

This server cannot be installed

-

security - not tested

A

license - permissive license

-

quality - not tested

How are these scores calculated?

remote-capable server

The server can be hosted and run remotely because it primarily relies on remote services or has no dependency on the local environment.

An MCP server that provides comprehensive US legislation.

us-legal-mcp