How do I integrate Klarna?

If you’re an administrator user in the Merchant portal, you will find platform-specific guides in the Products section. And you can always find more technical information on our Developer’s site or by contacting our Merchant support.

Integration testing
To test your integration, you´ll need Klarna API test credentials for our playground environment and test mode activated in your Klarna plug-in.

Once you request, and get access to your test account, the next step is to log in to the playground/test version of the Merchant portal. There you’ll find your Klarna API test credentials by going to Settings > Klarna API Credentials.

Ok, I want to know more about the test environment.

If instead you want to go live with your integration, please make sure that Test is unticked in the Klarna Payment app before you save. To be able to fully integrate with Klarna you will either need an e-commerce system in place or if you are wishing to build a bespoke system, you can refer to the developer guide.