Lean MCP
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- AlicenseNot gradedqualityDmaintenanceEnables verification of Lean 4 mathematical proofs via MCP tools, allowing AI clients to compile and check theorems with Mathlib.1MIT

LeanWarpofficial
AlicenseNot gradedqualityBmaintenanceEnables MCP clients such as Claude Code, Codex and Cursor to check and verify Lean 4 proofs, inspect goals at a position, try tactics, list holes, and extract declarations against hosted Lean releases with pinned libraries. Edits are checked on warm remote workers that reuse Lean's work between calls, so agents can iterate on proofs against their intended statements.20 PyPI5MIT- AlicenseAqualityCmaintenanceEnables coding agents to compile supplied files, run optional focused tests, and get static findings across ten programming languages, providing a deterministic feedback loop on the code they are about to return.1MIT
- AlicenseAqualityCmaintenanceEnables AI coding agents to discover installed host compilers, execute builds in isolated child environments with timeout enforcement, and convert noisy ANSI-laden compiler logs from Python, Rust, C/C++, Node, and Go toolchains into clean structured JSON diagnostics. It also reports toolchain readiness so agents can avoid blind invocations of missing compilers.4MIT
- AlicenseNot gradedqualityBmaintenanceEnables AI-driven formal proof search in Lean 4 by submitting theorems with sorry placeholders and running parallel LLM agents whose proposed edits are verified by the Lean compiler until a machine-checked proof is produced. Also provides Mathlib theorem search and job/attempt management tools.3MIT
- AlicenseNot gradedqualityCmaintenanceEnables AI coding agents and people to coordinate Lean 4 formalization work by exposing the harness over MCP: derive open/claimed/closed theorem nodes from the compiled environment, lock approved statements, record claims and logs, and run memory-capped build, proof-check, and audit jobs.MIT
TDQS
Scored across 1 tool
There is only one tool, so no overlap or misselection is possible. An agent cannot confuse lean_check with anything else.
A single snake_case noun-scoped name (lean_check) is internally consistent and clearly readable. Consistency cannot be violated with one tool.
A server named 'Lean MCP' implies a broader Lean workflow, yet it exposes only one execution tool. There is no tool for separate diagnostics retrieval, file handling, or environment information, making the surface very thin.
Execution plus diagnostics return covers the core 'run Lean code' loop, so the primary use case is served. However, related operations such as managing source files, listing library/version info, or iterative editing are absent, leaving notable gaps.