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.
