# API token authentication stops working on calls authenticated with an API token

Calls to /api/v2/* on Zendesk API stop working on April 30, 2027.

On April 30, 2027, API token authentication will stop working for calls authenticated with an API token. This change affects requests to /api/v2/* endpoints. After this date, all remaining API tokens will be permanently deactivated and affected calls will fail.

- API: Zendesk API (*.zendesk.com)
- Kind: Behaviour change
- Announced: June 1, 2026
- Takes effect: April 30, 2027
- Calls after that day: fail
- Calls it hits: `/api/v2/*`
- Who it affects: calls authenticated with an API token
- Source: [Announcement](https://developer.zendesk.com/api-reference/changelog/changelog/)
- Page: https://www.okapi.bot/providers/zendesk-api/breaking-changes/api-token-authentication-stops-working-on-calls-authenticated-with-an-api-token/

## What to use instead

Authenticate with OAuth access tokens instead of email/token basic authentication. Moving to OAuth takes more than changing credentials, as it requires an OAuth client registered in the Zendesk account and a token flow implemented in the integration.

Moving to OAuth needs an OAuth client registered in the Zendesk account and a token flow in the integration.

## Zendesk API's words

> On April 30, 2027, all remaining API tokens will be permanently deactivated.