Authorize customer-initiated transactions
Authorize a Payment Transaction with Klarna when the customer is present at checkout. Choose your integration path — the Klarna Web SDK, server-side integration, or the Klarna Mobile SDK in a native app.
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Authorize a Payment Transaction with Klarna when the customer is present during checkout. One decision shapes the integration — how the customer is taken through the Klarna Purchase Journey after clicking the Klarna payment button:
- 1.Web SDK (recommended) — the Klarna Web SDK launches the Klarna Purchase Journey in a popup or modal through the
initiatecallback, so the customer stays on the checkout page. - 2.Presentation API — the Partner's backend redirects the customer to the Klarna Purchase Journey and receives the Klarna Network Session Token by webhook. Use this path only when the Klarna Web SDK cannot be embedded.
- 3.Mobile SDK — the Klarna Mobile SDK, embedded in a native iOS, Android, or React Native app, presents Klarna and launches the Klarna Purchase Journey natively.
All three paths use the same API calls: createPaymentRequest
, retrieve the . For when to choose each path, see the Payment Authorization overview.
, retrieve the klarna_, then authorizePayment. For when to choose each path, see the Payment Authorization overview.Jump to section...