# The Event Data API stops working

Calls to the Event Data API on Crossref Event Data API stopped working on April 23, 2026.

The Event Data API stopped working on April 23, 2026. Calls to api.eventdata.crossref.org fail since that date. The public service was sunset, leaving the endpoint permanently inactive.

## What to use instead

Remove calls to the Event Data API. There is no replacement API, so tracking new events requires another source or removing the feature. Past events collected by Crossref remain available through a static repository linked from the deprecation notice.

No replacement API: new events need another source, or the feature goes.

- API: Crossref Event Data API (api.eventdata.crossref.org)
- Kind: Removal
- Takes effect: April 23, 2026
- Calls after that day: fail
- Source: [Announcement](https://www.crossref.org/deprecated/)
- Verified: November 6, 2026, against Crossref Event Data API's own pages
- Page: https://www.okapi.bot/providers/crossref-event-data-api/breaking-changes/the-event-data-api-stops-working/

## Crossref Event Data API's words

> The Event Data public API was sunset on 23 April 2026.

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