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.

To start registering purchases you will need to add your Klarna API credentials to your platform.

You can generate your Klarna API credentials by logging into the Merchant Portal  and selecting the Settings app.

The username and password you need to add to your platform are your Klarna API-credentials.

If you do not have your Klarna 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 Klarna 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 Klarna API-credentials for production, make sure that the test mode is switched off.
• If you use Klarna 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.