pip install lean-mcp

git clone https://github.com/KrystianYCSilva/lean-mcp.git
cd lean-mcp
pip install -e .

LEAN_PROJECT_PATH=/path/to/your/lean4/project lean-mcp-server

import asyncio
from lean_mcp.client import LeanMCPClient

async def main():
    async with LeanMCPClient() as client:
        await client.connect(lean_project_path="/path/to/lean4/project")

        result = await client.verify(
            "theorem modus_ponens (P Q : Prop) (hp : P) (hpq : P -> Q) : Q := hpq hp"
        )
        print(result)  # [QED] Compilacao bem-sucedida. Nenhum erro. Prova completa.

asyncio.run(main())

{
  "mcpServers": {
    "lean-mcp": {
      "command": "lean-mcp-server",
      "env": {
        "LEAN_PROJECT_PATH": "/absolute/path/to/lean4/project"
      }
    }
  }
}

MCP Client (any)
    |
    | stdio (JSON-RPC)
    v
lean_mcp/server.py      Tool: verify_lean_theorem
    |
    | subprocess (lake env lean)
    v
Lean 4 + Mathlib         Formal verifier