Your business never talks to the gateway directly. It talks to Rythzen Pay, and Rythzen Pay does the rest.
Your backend POSTs the order amount and customer details to the Rythzen Pay API with your brand’s key pair. You get back a hosted checkout URL.
We redirect the customer to a secure checkout to pay with a card or wallet. Their payment details are handled by the certified gateway — never by your servers or ours.
When the customer returns, Rythzen Pay re-checks the result server-to-server with the gateway. The ?r=success hint from the browser is never trusted on its own.
We fire a signed webhook to your backend and bounce the customer back to your return URL with a signed status. The transaction is written to the central ledger, tagged to your concern.
By default the gateway’s service charge is grossed-up onto the amount the customer pays, so the merchant nets exactly the price it set. This is configurable per concern — you can also absorb the fee instead.