mcp server

lexpact-mcp-server

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Use tool

Set up

Runs on your computer. Pick your agent and operating system.

Before you start

Node.js 20 or newer

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "lexpact-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "lexpact-mcp-server"
      ],
      "env": {
        "LEXPACT_API_KEY": "<your LEXPACT_API_KEY>"
      }
    }
  }
}

same format Cursor, GitHub Copilot CLI, Junie, JetBrains AI Assistant, Augment (Auggie CLI), Factory Droid, Kiro, Devin CLI +12

Values in angle brackets are placeholders. Restart Claude Desktop after editing its config.Claude Desktop docs

README

synced Nov 8, 2026

LexPact MCP Server

Exposes the LexPact contract generation API to Claude Desktop (or any MCP client) as three tools: list_contract_templates, generate_contract, get_contract. Thin proxy only — all validation and generation happens server-side at https://lexpact.co.uk/api/v1, so structured, LLM-actionable error messages reach Claude unchanged.

Setup

Get an API key at lexpact.co.uk/dashboard/api-keys.
Install dependencies:
```
cd mcp-server
npm install
```

Add to your Claude Desktop config (claude_desktop_config.json — Settings → Developer → Edit Config):

{
  "mcpServers": {
    "lexpact": {
      "command": "node",
      "args": ["/absolute/path/to/mcp-server/index.js"],
      "env": {
        "LEXPACT_API_KEY": "lp_live_your_key_here"
      }
    }
  }
}

Restart Claude Desktop. Ask it to draft a contract — it will call list_contract_templates and generate_contract as needed.

Environment variables

Var	Required	Purpose
`LEXPACT_API_KEY`	Yes	Your LexPact API key.
`LEXPACT_API_BASE_URL`	No	Override the API base URL (defaults to `https://lexpact.co.uk/api/v1`) — useful for testing against a local dev server.

Manual test

LEXPACT_API_KEY=lp_live_... node index.js

Then connect any MCP client (e.g. the MCP Inspector: npx @modelcontextprotocol/inspector node index.js).