sonirico/mcp-stockfish

A Model Context Protocol server that lets your AI talk to Stockfish. Because apparently we needed to make chess engines even more accessible to our silicon overlords.
> 🧠⚡🖥️ *Your LLM thinks, Stockfish calculates, you pretend you understand the resulting 15-move tactical sequence.*
What is this?
This creates a bridge between AI systems and the Stockfish chess engine via the MCP protocol. It handles multiple concurrent sessions because your AI probably wants to analyze seventeen positions simultaneously while you're still figuring out why your knight is hanging.
Built on mark3labs/mcp-go. Because reinventing wheels is for people with too much time.
Features
- **🔄 Concurrent Sessions**: Run multiple Stockfish instances without your CPU crying
- **⚡ Full UCI Support**: All the commands you need, none of the ones you don't
- **🎯 Actually Works**: Unlike your last side project, this one has proper error handling
- **📊 JSON Everything**: Because apparently we can't just use plain text anymore
- **🐳 Docker Ready**: Containerized for when you inevitably break your local setup
Supported UCI Commands ♟️
| **Command** | **Description** |
| -------------------- | ------------------------------------------------------------------------------ |
| uci | Initializes the engine in UCI mode |
| isready | Checks if the engine is ready. Returns readyok |
| position startpos | Sets up the board to the starting position |
| position fen [FEN] | Sets up a position using FEN notation |
| go | Starts the engine to compute the best move |
| go depth [n] | Searches n plies deep. Example: go depth 10 |
| go movetime [ms] | Thinks for a fixed amount of time in milliseconds. Example: go movetime 1000 |
| stop | Stops current search |
| quit | Closes the session |
Quick Start
Installation
Usage
Configuration ⚙️
Environment Variables
Server Configuration
- MCP_STOCKFISH_SERVER_MODE: "stdio" or "http" (default: "stdio")
- MCP_STOCKFISH_HTTP_HOST: HTTP host (default: "localhost")
- MCP_STOCKFISH_HTTP_PORT: HTTP port (default: 8080)
Stockfish 🐟 Configuration
- MCP_STOCKFISH_PATH: Path to Stockfish binary (default: "stockfish")
- MCP_STOCKFISH_MAX_SESSIONS: Max concurrent sessions (default: 10)
- MCP_STOCKFISH_SESSION_TIMEOUT: Session timeout (default: "30m")
- MCP_STOCKFISH_COMMAND_TIMEOUT: Command timeout (default: "30s")
Logging
- MCP_STOCKFISH_LOG_LEVEL: debug, info, warn, error, fatal
- MCP_STOCKFISH_LOG_FORMAT: json, console
- MCP_STOCKFISH_LOG_OUTPUT: stdout, stderr
Tool Parameters
- command: UCI command to execute