Technical and Integration

By adding the Klarna badge(s) to your website, your shoppers will know they have trusted payment options at the time of checkout. Head to our Marketing Toolkit to retrieve the payment badges for your site.

The first step is to fetch your API-credentials which you will then add in your platform to start to register purchases. To fetch your API-credentials you need to log in to the Merchant Portal and enter the Settings app. There you will be able to generate your API-credentials.

Your username and password are your API-credentials. If you do not have your API-credentials, you can generate these by going to the Settings app in the Merchant Portal.

Step 1: Complete all your company details, including your store name, the webpage’s URL, the email address of the authorized signatory, organisation number, VAT-number, the country in which you are registered, sales segment.

Step 2: You will receive your API-credentials, your Merchant ID and a shared secret which enables the possibility to take orders. In this step you will also be granted access to test credentials that you can use to make test purchases in your checkout before going live.

Step 3: Activate your payouts. Before doing so you need to integrate your live credentials in your platform.

To be able to start integrating with Klarna you need to have a functional website. This means that you need to have information on your products and it needs to be possible to add products to a shopping cart.

Check the following:

• If you use API-credentials for production, make sure that the test mode is switched off.
• If you use API-credentials for our test environment, make sure that the test mode is switched on.
• If the problem is still there please contact Merchant Support for further assistance.