GuideFlows and error handlingHandle different Mobile SDK flows end-to-end and implement robust error handling.
GuideKlarna Agentic Product Protocol API SpecsThe Agentic product protocol API is a standardized data interface built on Klarna’s production catalog. Access to the Agentic Product Protocol API is available for approved partners and developers, please reach out to [mailto:agenticproductprotocol@klarna.com agenticproductprotocol@klarna.com] for access.
GuideError codes and messages for Klarna PaymentsCheck out our usual error messages and what they mean
GuideTax handlingWhen using Klarna payments, it's important that you include correct tax details for each order.
GuideTesting and integration checklist for Sign in with KlarnaBefore you go live with Sign in with Klarna solution, follow this checklist to make sure your integration is tested and ready to be enabled in production.
GuideSample payment dataTest your integration of Klarna Payment methods in playground environment using sample payment data to ensure compliance and a reliable integration.
GuideError codes and messages for Order ManagementCheck out our usual error messages and what they mean
GuideTest casesIn this section, you can find different scenarios for testing Klarna’s payment and checkout flows.
GuideKlarna Docs - Before you testLearn about the Klarna credentials required and data you need to have handy to test our solutions.
GuideSample customer dataThis page contains sample data you can use for testing your integration in the Klarna playground environment.
GuideMerchant portal user guideKlarna's Merchant Portal allows account management, order handling, report downloads, and marketing asset access. Features vary by onboarding method.
GuideError codes and messagesKlarna's API uses HTTP status codes for request outcomes: 2xx for success, 4xx/5xx for client/server errors, with details in the response body. Check PSP or Klarna logs for more.
GuideValidations in the payment processHere you find information on the validations that occur throughout the payment process.
GuideGo-live checklistBefore you go live, follow this checklist to make sure you're ready to start accepting Klarna payments.