Powered by Stockfish 17 lite NNUE. Free API access is available; paid subscriptions are not enabled.
Terms of service
Draft. Replace with reviewed terms before public launch.
Use
You may use the API in commercial and non-commercial products. You may not resell raw access, circumvent limits, or use keyless access to avoid signing up.
Keys and accounts
You are responsible for keys issued to your account and for budgets you set. We may suspend keys involved in abuse or chargebacks.
Billing
Paid plans bill monthly through Stripe; overage is metered. Refunds for unused included units are not provided. Disputed charges suspend the account until resolved.
Availability
The service is provided as is during preview. Deprecated engine versions remain available for six months after a successor ships.
Stockfish
Stockfish is licensed under the GPLv3 by its authors; this service hosts it and is not affiliated with the project. Evaluations returned to you are yours to use.