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When can I start integrating Klarna?

As soon as your application is approved, you’ll be able to generate

, and start the integration right away.

API calls are how your system and Klarna’s system communicate. Klarna API credentials are used to authenticate the API calls your system sends to us. In this way, you protect your business, and we keep our services secure.


Copyright © 2005-2024 Klarna. Klarna Financial Services UK Ltd is authorised and regulated by the Financial Conduct Authority (“FCA”) for carrying out regulated consumer credit activities (firm reference number 987889), and for the provision of payment services under the Payment Services Regulations 2017 (firm reference number 987816). Klarna Financial Services UK Ltd offers both regulated and unregulated products. Klarna’s Pay in 3 instalments and Pay in 30 days agreements are not regulated by the FCA. Incorporated in England (company number 14290857), with its registered office at 10 York Road, London, SE1 7ND.