chess402

Pay-per-call chess API. Agents discover this service via /openapi.json and pay per request via x402 or MPP.

Endpoints

• POST /api/cloud-eval — Stockfish cloud evaluation of a FEN position (depth, eval, principal variation). $0.005
• POST /api/masters — Masters openings explorer: top moves, win rates, recent master games for a FEN. $0.003
• POST /api/user — Lichess user profile snapshot (ratings, perfs, profile fields). $0.001
• POST /api/puzzle/daily— Today's daily puzzle (no body needed). $0.001

Upstream

Backed by the Lichess public API. AGPL-3.0 — please respect Lichess rate limits and credit them in your UI when you display results.