The full upstream README, mirrored here for reference. Install config, tool schemas, adoption signals, and an original overview live on the Prover listing page.
Lean 4 MCP server: compile and prove theorems with Mathlib.
Add to your MCP client (e.g. Claude Desktop claude_desktop_config.json):
Authentication uses OAuth 2.1 via GitHub — your MCP client handles the flow automatically.
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. |
| 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.