# /checkout/v3/* stops working

Calls to /checkout/v3/* on Klarna API stopped working on September 15, 2026.

On September 15, 2026, Klarna shut down access to the /checkout/v3/* endpoints. Calls made to these endpoints fail since that date. Merchants operating through Kustom no longer have access to the Klarna Merchant Portal or Klarna's API.

## What to use instead

Switch to Kustom Checkout by sending requests to api.kustom.co using the same /checkout/v3 paths and parameters.

- API: Klarna API (api.klarna.com)
- Kind: Endpoint removal
- Takes effect: September 15, 2026
- Calls after that day: fail
- Calls it hits: `/checkout/v3/*`
- Source: [Announcement](https://help.kustom.co/en/articles/647216-end-of-access-to-the-klarna-merchant-portal)
- Verified: November 6, 2026, against Klarna API's own pages
- Page: https://www.okapi.bot/providers/klarna-api/breaking-changes/checkout-v3-stops-working/

## Klarna API's words

> Since September 15, 2026, merchants operating through Kustom no longer have access to the Klarna Merchant Portal or Klarna's API

Okapi finds the calls this change hits in your repo and opens the pull request with the fix: https://github.com/apps/okapi-agent