# sync on /youtube/v3/captions stops working

Calls to /youtube/v3/captions, query parameter sync on YouTube Data API stopped working on April 12, 2024.

On April 12, 2024, support ended for the query parameter sync on the /youtube/v3/captions endpoint. Requests using this parameter across the captions.insert and captions.update methods now fail. The deprecation was announced on March 13, 2024, stating that YouTube would stop supporting the parameter.

## What to use instead

Include timing information when inserting or updating caption tracks.

- API: YouTube Data API (youtube.googleapis.com)
- Kind: Parameter removal
- Announced: March 13, 2024
- Takes effect: April 12, 2024
- Calls after that day: fail
- Calls it hits: `/youtube/v3/captions`, `query parameter sync`
- Source: [Announcement](https://developers.google.com/youtube/v3/revision_history)
- Verified: November 6, 2026, against YouTube Data API's own pages
- Page: https://www.okapi.bot/providers/youtube-data-api/breaking-changes/sync-on-youtube-v3-captions-stops-working/

## YouTube Data API's words

> The sync parameter for the captions.insert and captions.update methods has been deprecated. YouTube will stop supporting the parameter as of April 12, 2024.

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