Casino API Integration — Complete Guide for Operators (2026)

Seamless Wallet keeps a single source of truth for player balance on your platform. Every bet and win calls your endpoint in real time. Transfer Wallet moves funds into the provider's wallet on launch and pulls them back on exit.

Seamless wins on UX, fraud control and cross-product wallet sharing. Transfer can be simpler for small operators with one or two providers, but does not scale.

For a Seamless Wallet integration you'll typically expose these endpoints to the provider:

• POST /auth — validate session token, return player profile + balance.
• POST /balance — return current balance in the player's currency.
• POST /bet — debit wager, idempotent on transaction_id.
• POST /win — credit payout, idempotent on transaction_id.
• POST /rollback — reverse a bet/win, must be safe to call repeatedly.
• POST /jackpot — credit network jackpot wins.

Every monetary endpoint must be idempotent on (provider_id, transaction_id) — providers retry aggressively under load. Store every transaction in an immutable ledger and short-circuit duplicates with the original response.

Pick one base currency for ledgering (usually EUR or USD), convert at the moment of bet using a daily FX rate, and never round inside the API layer — only at presentation time.

Most aggregators run a 3-phase certification: sandbox functional tests, load tests at 2× expected peak, and a 'soak' phase with mirrored production traffic. Plan a 7–10 day window per studio before opening lobby access to real players.