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Draft changelog: block endpoints, subscription events, broadcast scopes #405

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Draft changelog: block endpoints, subscription events, broadcast scopes #405

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24 changes: 24 additions & 0 deletions changelog.mdx
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Expand Up @@ -7,6 +7,30 @@ 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 v2">
### Block and unblock endpoints for Enterprise

We added two new endpoints for managing blocks on behalf of an authenticated user:

- [`POST /2/users/{id}/blocking`](/x-api/users/block-user) — block a user
- [`DELETE /2/users/{source_user_id}/blocking/{target_user_id}`](/x-api/users/unblock-user) — unblock a user

These endpoints are only available on the [Enterprise plan](/enterprise-api/introduction). They are not available on self-serve (pay-per-use) tiers.

### Subscription events for X Activity API

We added subscription events to the [X Activity API](/x-api/activity/introduction). Subscribe by User ID to receive real-time notifications when a user subscribes to another user (`subscriptions.subscribe`) or when a subscription expires (`subscriptions.unsubscribe`). Note that `subscriptions.unsubscribe` is emitted when the subscription actually expires, not upon cancellation.

Both events support the `direction` qualifier (`inbound`, `outbound`). These are private events: they require user-context (OAuth 2.0) authentication with the `follows.read` scope.

### New `broadcast.read` and `broadcast.write` OAuth 2.0 scopes

We added two new [OAuth 2.0 scopes](/fundamentals/authentication/oauth-2-0/authorization-code) for live broadcasts:

- `broadcast.read` — view a user's live broadcasts and their chat
- `broadcast.write` — manage a user's live broadcasts and send chat messages on their behalf
</Update>

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

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