🇺🇸 US Legal MCP Server

Comprehensive US legal data in your AI workflow. Search Congress bills, Federal Register documents, court opinions, and committees. No API keys required (optional for enhanced access).

An MCP (Model Context Protocol) server that brings authoritative US legal information into AI coding environments like Cursor and Claude Desktop.

Why Use US Legal MCP?

🆓 No API Keys Required – Works out of the box (optional keys for enhanced access)
📜 Comprehensive Sources – Congress, Federal Register, CourtListener
⚡ Easy Setup – One-click install in Cursor or simple manual setup
🔍 Multi-Source Search – Search across all legal sources simultaneously
📊 Real-time Data – Recent bills, regulations, and court opinions

Quick Start

Ready to explore US legal data? Install in seconds:

Install in Cursor (Recommended):

🔗 Install in Cursor

Or install manually:

npm install -g us-legal-mcp
# Or from source:
git clone https://github.com/JamesANZ/legal-mcp.git
cd legal-mcp && npm install && npm run build

Features

📜 Congress.gov

search-congress-bills – Search bills and resolutions
get-recent-bills – Get recently introduced legislation
get-congress-committees – List Congressional committees

📋 Federal Register

search-federal-register – Search regulations and executive orders
get-recent-regulations – Get recently published documents

⚖️ CourtListener

search-court-opinions – Search court opinions (federal and state)
get-recent-court-opinions – Get recent court decisions

🔍 Multi-Source

search-all-legal – Comprehensive search across all sources
search_digital_asset_regulation – Aggregate search (Congress + Federal Register + all regulator feeds) scoped to crypto/stablecoin topics

🪙 Digital Asset & Crypto Legislation

get_genius_act_info – Curated reference for the GENIUS Act (S.1582, 119th Cong., Pub. L. 119-27) — US payment stablecoin framework
get_clarity_act_info – Curated reference for the Digital Asset Market CLARITY Act (H.R.3633, 119th Cong.) — SEC/CFTC digital-asset jurisdiction
get_curated_act – Fetch any curated act by slug (genius-act, clarity-act)
get_bill_details – Live Congress.gov metadata for any bill (by billId like s1582-119 or hr3633-119)
get_bill_actions – Full chronological action history for a bill
get_bill_text – All text versions (Introduced, Engrossed, Enrolled…) with PDF/HTML/XML links
get_public_law_text – GovInfo public law package + truncated full text (e.g., 119-27 for GENIUS Act)

🏛️ Regulator News Feeds

get_recent_regulator_news – Recent press releases from OCC, SEC, CFTC, Federal Reserve, Treasury, or FinCEN
search_regulator_news – Keyword search across any/all regulator press-release feeds

Installation

Cursor (One-Click)

Click the install link above or use:

cursor://anysphere.cursor-deeplink/mcp/install?name=legal-mcp&config=eyJsZWdhbC1tY3AiOnsiY29tbWFuZCI6Im5weCIsImFyZ3MiOlsiLXkiLCJ1cy1sZWdhbC1tY3AiXX19

Manual Installation

Requirements: Node.js 18+ and npm

# Clone and build
git clone https://github.com/JamesANZ/legal-mcp.git
cd legal-mcp
npm install
npm run build

# Run server
npm start

Claude Desktop

Add to claude_desktop_config.json:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json Windows: %APPDATA%\Claude\claude_desktop_config.json

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

Restart Claude Desktop after configuration.

Usage Examples

Search Congress Bills

Find bills related to a specific topic:

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

Search Federal Regulations

Find regulations on a topic:

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

Comprehensive Legal Search

Search across all sources simultaneously:

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

Search Court Opinions

Find court decisions:

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

Data Sources

| Source | Description | API | Auth Required | | -------------------- | --------------------------------------------------------------------- | -------------------------------------------------- | --------------------------- | | Congress.gov | Bills, resolutions, committees, bill actions, bill text versions | 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 | | GovInfo | Public laws, enrolled bill PDFs, XML | https://api.govinfo.gov | Optional (api.data.gov key) | | OCC | Office of the Comptroller of the Currency news releases | https://www.occ.gov/rss/occ_news.xml | No | | SEC | Securities and Exchange Commission press releases | https://www.sec.gov/news/pressreleases.rss | No | | CFTC | Commodity Futures Trading Commission (general, enforcement, speeches) | https://www.cftc.gov/RSS/ | No | | Federal Reserve | Federal Reserve Board press releases | https://www.federalreserve.gov/feeds/press_all.xml | No | | Treasury | US Treasury press releases (HTML listing) | https://home.treasury.gov/news/press-releases | No | | FinCEN | Financial Crimes Enforcement Network press releases (HTML listing) | https://www.fincen.gov/news/press-releases | No |

API Keys (Optional)

Congress.gov API Key

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

CourtListener API Key

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

GovInfo API Key

Visit https://api.data.gov/signup/ to request a free key
Set GOVINFO_API_KEY environment variable. Without it the server falls back to DEMO_KEY (rate-limited).

Use Cases

Legal Researchers – Quick access to bills, regulations, and court opinions
Policy Analysts – Track legislation and regulatory changes
Lawyers – Reference tool for case law and regulations
Developers – Build apps with authoritative legal data

Technical Details

Built with: Node.js, TypeScript, MCP SDK Dependencies: @modelcontextprotocol/sdk, superagent, zod Platforms: macOS, Windows, Linux

Contributing

⭐ If this project helps you, please star it on GitHub! ⭐

Contributions welcome! Please open an issue or submit a pull request.

License

MIT License – see LICENSE file for details.

Support

If you find this project useful, consider supporting it:

⚡ Lightning Network

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Ξ Ethereum/EVM: 0x42ea529282DDE0AA87B42d9E83316eb23FE62c3f

us-legal-mcp