Checkout integration embeds a stablecoin payment option into the customer-facing process used to complete an online, in-app, or other digital purchase.
A checkout can display the amount due, supported stablecoins and networks, payment instructions, wallet-connect options, QR codes, expiration times, and payment status. Back-end services can calculate exchange rates, monitor settlement, handle retries, and return the result to the merchant's order system. Good integration also needs to manage underpayments, overpayments, refunds, and network mismatches.
Checkout integration describes the customer purchase flow. A payment gateway provides the technical interface that can power some or all of that flow.
Checkout design affects payment completion rates, user error, transaction monitoring, and the merchant's ability to reconcile stablecoin payments with orders.
An online checkout can show a USDC option, generate a payment request, and automatically update the order when the required transaction is received.