API and SDKsSupport
Errors

Error codes, timeouts and more make your integration robust.

Klarna Checkout (KCO) has been acquired by Kustom. Read more here.

View out API specification for errors here

  • The timeout for requests towards the Klarna Checkout API is 30s after which a HTTP status code 504 will be returned.
  • If you get a 4XX or 5XX or any other type of error, you should create a new order.
  • Klarna checkout orders are only valid for 48 hours after merchant update or client interaction and expire after that. This expiration is normal.