API and SDKsSupport
Klarna resources
Get up and running with Klarna resources. Explore our resources to get detailed insights and guidance. Learn more about testing Klarna solutions to ensure a smoooth integration process and to familiarize yourself with our policies to stay compliant.
Testing Klarna products
Use our tools to test and enable Klarna solutions in a fast and smart way.
Demo store
Check out the demo store to have a complete overview of Klarna purchase flow.
Klarna resources
Documentation/Article
Sample data
Use our sample data to test the different Klarna solutions and flows.
Documentation/Article
Error codes
Learn more about error codes and messages and how to resolve them..
Documentation/Article
Marketing
Get access to a full suite of tools and information designed to help you effectively showcase Klarna's payment solutions to your customers.
Documentation/Article
Legal
Learn more about our legal agreements for Klarna services, policies and guidelines for regulatory and compliance requirements.
Documentation/Article
Merchant Portal guide
Use this guide to learn how to navigate the Klarna portal.
Documentation/Article
API reference
Learn more about Klarna's APIs, available endpoints and how to interact with them..