X removes the Manage Blocks endpoint from API v2

What changed

On May 31, 2023 the X API changelog recorded that the Manage Blocks endpoint was removed from X API v2. The same day it noted support for retrieving a bookmarks count and for posts longer than 280 characters.

What it means

Apps that blocked accounts through X API v2 can no longer do so with the Manage Blocks endpoint.

Who is affected

Developers whose tools block accounts on behalf of users. Posting and scheduling are not affected.

What to do

Remove calls to the Manage Blocks endpoint. The changelog gives no replacement and no deadline.