ax-prover-base-mcp

Axiomatic-AI/ax-prover-base-mcp

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Install to Claude Code

This server doesn't publish a one-line install command. Follow the setup in the source repository.

Summary

Lean 4 MCP server: compile, prove theorems, and formalize math with Mathlib.

README.md

Axiomatic Prover — MCP Server

Lean 4 MCP server: compile and prove theorems with Mathlib.

Connect

Add to your MCP client (e.g. Claude Desktop claude_desktop_config.json):

{
  "mcpServers": {
    "ax-prover": {
      "type": "streamable-http",
      "url": "https://prover.axiomatic-ai.com/mcp/"
    }
  }
}

Authentication uses OAuth 2.1 via GitHub — your MCP client handles the flow automatically.

Tools

Submit (async — returns a `job_id`)

| Tool | Description | |------|-------------| | lean4_build | Compile Lean 4 source code in a Mathlib-enabled sandbox. Code is sent to external cloud services for compilation; if proving, also for AI processing. | | lean4_prove_theorems | Automatically prove Lean 4 theorems that contain sorry. Code is sent to external cloud services for compilation and AI proving. |

Poll

| Tool | Description | |------|-------------| | lean4_get_job_status | Poll for the status and result of any ax-prover job. |

All submit tools are asynchronous — they return a job_id immediately. Poll with lean4_get_job_status(job_id) until status is completed or failed.