# xslt on GET /w/api.php stops working

Calls to /w/api.php, query parameter xslt on Wikisource stopped working on November 30, 2025.

- API: Wikisource (ar.wikisource.org)
- Kind: Endpoint removal
- Announced: November 21, 2025
- Takes effect: November 30, 2025
- Calls after that day: fail
- Calls it hits: `/w/api.php`, `query parameter xslt`
- Source: [Announcement](https://lists.wikimedia.org/hyperkitty/list/mediawiki-api-announce@lists.wikimedia.org/message/5AX7UWAVVUNUSBOIRHMNOKWOZ5EZI3JX/)
- Page: https://www.okapi.bot/providers/wikisource/breaking-changes/xslt-on-get-w-api-php-stops-working/

## What to use instead

Stop sending an XSLT stylesheet; transform the XML or JSON output client-side.