US Legal MCP Server

1# 🇺🇸 US Legal MCP Server
2 
3> **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).
4 
5An [MCP (Model Context Protocol)](https://modelcontextprotocol.io) server that brings authoritative US legal information into AI coding environments like Cursor and Claude Desktop.
6 
7## Why Use US Legal MCP?
8 
9- 🆓 **No API Keys Required** – Works out of the box (optional keys for enhanced access)
10- 📜 **Comprehensive Sources** – Congress, Federal Register, CourtListener
11- ⚡ **Easy Setup** – One-click install in Cursor or simple manual setup
12- 🔍 **Multi-Source Search** – Search across all legal sources simultaneously
13- 📊 **Real-time Data** – Recent bills, regulations, and court opinions
14 
15## Quick Start
16 
17Ready to explore US legal data? Install in seconds:
18 
19**Install in Cursor (Recommended):**
20 
21[🔗 Install in Cursor](cursor://anysphere.cursor-deeplink/mcp/install?name=legal-mcp&config=eyJsZWdhbC1tY3AiOnsiY29tbWFuZCI6Im5weCIsImFyZ3MiOlsiLXkiLCJ1cy1sZWdhbC1tY3AiXX19)
22 
23**Or install manually:**
24 
25```bash
26npm install -g us-legal-mcp
27# Or from source:
28git clone https://github.com/JamesANZ/legal-mcp.git
29cd legal-mcp && npm install && npm run build
30```
31 
32## Features
33 
34### 📜 Congress.gov
35- **`search-congress-bills`** – Search bills and resolutions
36- **`get-recent-bills`** – Get recently introduced legislation
37- **`get-congress-committees`** – List Congressional committees
38 
39### 📋 Federal Register
40- **`search-federal-register`** – Search regulations and executive orders
41- **`get-recent-regulations`** – Get recently published documents
42 
43### ⚖️ CourtListener
44- **`search-court-opinions`** – Search court opinions (federal and state)
45- **`get-recent-court-opinions`** – Get recent court decisions
46 
47### 🔍 Multi-Source
48- **`search-all-legal`** – Comprehensive search across all sources
49 
50## Installation
51 
52### Cursor (One-Click)
53 
54Click the install link above or use:
55 
56```
57cursor://anysphere.cursor-deeplink/mcp/install?name=legal-mcp&config=eyJsZWdhbC1tY3AiOnsiY29tbWFuZCI6Im5weCIsImFyZ3MiOlsiLXkiLCJ1cy1sZWdhbC1tY3AiXX19
58```
59 
60### Manual Installation
61 
62**Requirements:** Node.js 18+ and npm
63 
64```bash
65# Clone and build
66git clone https://github.com/JamesANZ/legal-mcp.git
67cd legal-mcp
68npm install
69npm run build
70 
71# Run server
72npm start
73```
74 
75### Claude Desktop
76 
77Add to `claude_desktop_config.json`:
78 
79**macOS**: `~/Library/Application Support/Claude/claude_desktop_config.json`  
80**Windows**: `%APPDATA%\Claude\claude_desktop_config.json`
81 
82```json
83{
84  "mcpServers": {
85    "us-legal-mcp": {
86      "command": "node",
87      "args": ["/absolute/path/to/legal-mcp/dist/index.js"],
88      "env": {
89        "CONGRESS_API_KEY": "",
90        "COURT_LISTENER_API_KEY": ""
91      }
92    }
93  }
94}
95```
96 
97Restart Claude Desktop after configuration.
98 
99## Usage Examples
100 
101### Search Congress Bills
102Find bills related to a specific topic:
103 
104```json
105{
106  "tool": "search-congress-bills",
107  "arguments": {
108    "query": "immigration",
109    "congress": 118,
110    "limit": 10
111  }
112}
113```
114 
115### Search Federal Regulations
116Find regulations on a topic:
117 
118```json
119{
120  "tool": "search-federal-register",
121  "arguments": {
122    "query": "environmental protection",
123    "limit": 5
124  }
125}
126```
127 
128### Comprehensive Legal Search
129Search across all sources simultaneously:
130 
131```json
132{
133  "tool": "search-all-legal",
134  "arguments": {
135    "query": "healthcare",
136    "limit": 20
137  }
138}
139```
140 
141### Search Court Opinions
142Find court decisions:
143 
144```json
145{
146  "tool": "search-court-opinions",
147  "arguments": {
148    "query": "immigration asylum",
149    "court": "scotus",
150    "limit": 10
151  }
152}
153```
154 
155## Data Sources
156 
157| Source | Description | API | Auth Required |
158|--------|-------------|-----|---------------|
159| **Congress.gov** | Bills, resolutions, committees | https://api.congress.gov/v3 | Optional |
160| **Federal Register** | Regulations, executive orders | https://www.federalregister.gov/api/v1 | No |
161| **CourtListener** | Court opinions, decisions | https://www.courtlistener.com/api/ | Optional |
162 
163## API Keys (Optional)
164 
165### Congress.gov API Key
1661. Visit [https://api.congress.gov/](https://api.congress.gov/)
1672. Sign up for a free account
1683. Get your API key
1694. Set `CONGRESS_API_KEY` environment variable
170 
171### CourtListener API Key
1721. Visit [https://www.courtlistener.com/api/](https://www.courtlistener.com/api/)
1732. Create a free account
1743. Get your API key from your profile
1754. Set `COURT_LISTENER_API_KEY` environment variable
176 
177## Use Cases
178 
179- **Legal Researchers** – Quick access to bills, regulations, and court opinions
180- **Policy Analysts** – Track legislation and regulatory changes
181- **Lawyers** – Reference tool for case law and regulations
182- **Developers** – Build apps with authoritative legal data
183 
184## Technical Details
185 
186**Built with:** Node.js, TypeScript, MCP SDK  
187**Dependencies:** `@modelcontextprotocol/sdk`, `superagent`, `zod`  
188**Platforms:** macOS, Windows, Linux
189 
190## Contributing
191 
192⭐ **If this project helps you, please star it on GitHub!** ⭐
193 
194Contributions welcome! Please open an issue or submit a pull request.
195 
196## License
197 
198MIT License – see LICENSE file for details.
199 
200## Support
201 
202If you find this project useful, consider supporting it:
203 
204**⚡ Lightning Network**
205```
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207```
208 
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212