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Lean

Verified Integration
Author: @LarsenClose•Category: ServerApplication
GitHub Repository
JSON-RPC 2.0
Protocol Standard
Sub-second
Execution Latency
Active
Operational Status
Tags:#Claude#Search#Database#API#Git#Filesystem#AI#GitHub#Node.js

Client Configuration

— Connect Lean to Claude Desktop or Cursor in seconds
{
  "mcpServers": {
    "lean": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-lean"
      ],
      "env": {}
    }
  }
}
Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows).
Architecture & Capabilities

System Overview

Enables AI assistants to interact with Lean 4's Language Server Protocol via a high-performance Rust-based Model Context Protocol server.

Indexed Date

7/23/2026

License

Open Source

Protocol Layer

stdio / SSE RPC

Frequently Asked Questions

Architecture and operational details for Lean

Yes, it's designed for seamless integration with AI assistants, with clear configuration examples provided for tools like Claude Code via `.mcp.json`.

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