Use Stockfish from Claude, Cursor and other MCP clients

the MCP server and the Claude Code skill

Connect an MCP client

Endpoint: https://stockfishapi.com/mcp (Streamable HTTP).

Tools: evaluate_position, best_move, legal_moves, validate_position.

Set the Authorization header to Bearer followed by your API key. Keyless calls work within the trial limits. OAuth and a downloadable skill package are not available. You can also give an agent /llms.txt and the REST OpenAPI spec.

Get a key with one call: POST /v1/signup {"email":"you@example.com"}. Free plan, depth 14, 2,000 units a day.