Cerebra Legal MCP Server

An enterprise-grade MCP server for legal reasoning and analysis based on the "think" tool concept from Anthropic's engineering blog.

Overview

Cerebra Legal provides three powerful tools for legal reasoning and analysis:

1. legal_think - A structured legal reasoning tool that helps analyze complex legal issues with domain-specific guidance and templates.
2. legal_ask_followup_question - A specialized tool for asking follow-up questions in legal contexts with domain-specific options.
3. legal_attempt_completion - A tool for presenting legal analysis results with proper structure and citation formatting.

The server automatically detects legal domains (ANSC contestation, consumer protection, contract analysis) and provides domain-specific guidance, templates, and feedback.

Features

• Domain Detection: Automatically identifies the legal domain of the analysis
• Domain-Specific Guidance: Provides tailored guidance for different legal domains
• Structured Templates: Offers domain-specific templates for legal analysis
• Citation Formatting: Properly formats legal citations
• Thought Quality Analysis: Provides feedback on legal reasoning quality
• Revision Support: Allows for revising previous thoughts

Installation

# Clone the repository
git clone https://github.com/yoda-digital/mcp-cerebra-legal-server.git
cd mcp-cerebra-legal-server

# Install dependencies
npm install

# Build the project
npm run build

Usage

Running the Server

npm start

Testing the Server

The repository includes a test client that demonstrates how to interact with the server:

# Make the test client executable
chmod +x test-client.js

# Run the test client
./test-client.js

The test client will:

1. Start the server
2. Send a tools/list request to get available tools
3. Send a legal_think request with a sample thought
4. Display the server's responses

Adding to Claude

To add the server to Claude, update your MCP settings file with the following configuration:

For VSCode Extension

Edit the file at ~/.config/Code/User/globalStorage/rooveterinaryinc.roo-cline/settings/cline_mcp_settings.json:

{
  "mcpServers": {
    "cerebra-legal": {
      "command": "node",
      "args": ["/path/to/mcp-cerebra-legal-server/build/index.js"],
      "disabled": false,
      "alwaysAllow": []
    }
  }
}

For Claude Desktop App

Edit the file at ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or the equivalent on your platform:

{
  "mcpServers": {
    "cerebra-legal": {
      "command": "node",
      "args": ["/path/to/mcp-cerebra-legal-server/build/index.js"],
      "disabled": false,
      "alwaysAllow": []
    }
  }
}

Using the Tools in Claude

Once the server is added to Claude, you can use the tools in your conversations:

System Prompt Integration

For optimal AI interaction with these legal tools, it's essential to include proper guidance in the system prompt. These tools follow the same AI → Human interaction model as standard Cline tools but with domain-specific enhancements.

The system prompt should include detailed documentation for each tool:

## legal_think
Description: A structured legal reasoning tool that helps analyze complex legal issues with domain-specific guidance and templates. This tool enables step-by-step legal analysis with feedback on reasoning quality.

Parameters:
- thought: (required) The current legal reasoning step
- thoughtNumber: (required) Current thought number in sequence
- totalThoughts: (required) Estimated total thoughts needed
- nextThoughtNeeded: (required) Whether another thought step is needed
- category: (optional) Legal domain category (auto-detected if not provided)
- references: (optional) Array of legal references
- isRevision: (optional) Whether this revises previous 

... [View full README on GitHub](https://github.com/yoda-digital/mcp-cerebra-legal-server#readme)