Guide
Customer data requirements for authorize()
This section describes the customer data we require to place an order, depending on the purchase country.
Guide
Check the details of a payment session
Use the Klarna payments API to check the details of a session at any time.
Guide
Update the cart
If your customer updates their shopping cart or if you make any changes to payment details, you have to update the payment session before creating an order.
Guide
Cancel an authorization
Use the Klarna payments API to cancel an authorization and remove any customer debts gotten during the payment session.
Guide
Android - Getting started
Get started integrating Klarna Mobile SDK for Android
Guide
Adyen order management and disputes
In this section, you’ll find the best practices for Adyen and Klarna integration. We recommend you follow the steps below to get the most value from your new payment option.
Guide
In-store API integration
Use Klarna API to integrate In-store with your store's solution.
Guide
What is Klarna In-store?
Klarna Payments for physical stores brings the convenience and flexibility of Klarna's seamless payment solutions to your in-store shopping experience.
Guide
Payments with Optimizely
Optimizely offers a digital experience platform for content creation, e-commerce, and digital marketing all in one place.
Guide
Payments with Shopware
Shopware offers a comprehensive e-commerce solution that enables maximum flexibility, full scalability, and expert support every step of the way.
Guide
Go-live checklist
Before you go live, follow this checklist to make sure you're ready to start accepting Klarna payments.
Guide
Klarna deals promotions
Incentivize Klarna shoppers and boost conversion with an auto-applied deal on your site that is seamless to use.
Guide
Monitor the status
Learn how to monitor the distribution status of an in-store payment.
Guide
Multi-currency payments
This article explains the behavior and limitations of multicurrency payments using Klarna in the Shopify store.
Guide
Known constraints for Klarna Payments in Shopify
Read about some limitations that can affect your Klarna with Shopify integration.