New to the Cashier? Start with the concept guide: The Cashier.
The Cashier is Omno's hosted checkout. You create a session on your backend (POST /v3/public/cashier/session), which returns a sessionId and a per-session Cashier token, then open it on your frontend with the Web SDK.
- Full Cashier — card, APM and crypto; deposit and withdrawal in one session; KYC, saved cards, card payouts.
- Single Payment (Card · APM · Crypto) — a focused single-column checkout for one method, with an optional fixed amount.
ℹ️ Already on Payment Page? The legacy Payment Page is not supported for new integrations. Use Single Payment — Card instead.
⚠️ Warning: The final result comes from a webhook or a GET on the transaction, never from a redirect or SDK event.