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Draft changelog: block endpoints, subscription events, broadcast scopes #406

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Draft changelog: block endpoints, subscription events, broadcast scopes #406

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19 changes: 19 additions & 0 deletions changelog.mdx
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Expand Up @@ -7,6 +7,25 @@ keywords: ["changelog", "API updates", "release notes", "what's new", "API chang

To subscribe to updates, please [**“Turn on notifications”**](https://help.x.com/en/managing-your-account/notifications-on-mobile-devices#:~:text=In%20the%20top%20menu,%20you,you%20would%20like%20to%20receive) for [**@API**](https://x.com/api). You can also follow this changelog in your feed reader via the [**RSS feed**](https://docs.x.com/changelog/rss.xml).

<Update label="Sep 9, 2026" description="X API">
### Block and unblock endpoints for Enterprise

We added [`POST /2/users/{id}/blocking`](/x-api/users/block-user) and [`DELETE /2/users/{source_user_id}/blocking/{target_user_id}`](/x-api/users/unblock-user) to the X API v2. You can now block and unblock users on behalf of an authenticated user. These endpoints are only available on the [Enterprise plan](/enterprise-api/introduction) and are not available on self-serve (Pay-Per-Use) tiers.

### Subscription events for X Activity API

We added `subscriptions.subscribe` and `subscriptions.unsubscribe` events to the [X Activity API](/x-api/activity/introduction). You can now subscribe by User ID to receive real-time notifications when a user subscribes to, or unsubscribes from, another user via the paid subscriptions button on a profile. Both events support the `direction` filter (`inbound`, `outbound`), which is also now supported on `follow.follow` and `follow.unfollow`.

These are private events: they require user-context (OAuth 2.0) authentication with the `follows.read` scope. Note that `subscriptions.unsubscribe` is emitted when the subscription actually expires, not upon cancellation.

### Broadcast scopes for OAuth 2.0

We added two new scopes to [OAuth 2.0 Authorization Code Flow with PKCE](/fundamentals/authentication/oauth-2-0/authorization-code):

- `broadcast.read`: View your live broadcasts and their chat
- `broadcast.write`: Manage your live broadcasts and send chat messages on your behalf
</Update>

<Update label="Sep 1, 2026" description="X API v2">
### Media upload and Post-create size and duration limits

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