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Draft changelog: Activity API events, qualifiers, usage credits #359

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Draft changelog: Activity API events, qualifiers, usage credits #359

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13 changes: 13 additions & 0 deletions changelog.mdx
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Expand Up @@ -7,6 +7,19 @@ 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="Aug 30, 2026" description="X API v2">
### New features

- **Live broadcast events for the X Activity API**: We added `broadcast.start` and `broadcast.end` events to the [X Activity API](/x-api/activity/introduction). Subscribe by User ID to receive real-time notifications when a user starts or ends a live broadcast. Both are public events, so you can subscribe with either app-only or user-context authentication.
- **Filter qualifiers for X Activity API subscriptions**: Subscriptions now accept an optional `filter.qualifiers` map (up to 8 entries) to narrow which events match. Use `conversation_type` (`direct` or `group`) on `chat.received`, and `direction` (`inbound` or `outbound`) on `follow.follow`, `follow.unfollow`, and `like.create`. See [Filter qualifiers](/x-api/activity/introduction#filter-qualifiers).
- **Usage credits endpoint**: The new [`GET /2/usage/credits`](/x-api/usage/get-usage-credits) endpoint returns your Pay-per-use (PPU) credit balance in USD, so you can monitor remaining credits programmatically. See the [Usage endpoints](/x-api/usage/introduction).

### Updates

- **`is_subscriber` on `broadcast.chat` events**: The `broadcast.chat` event payload now includes an `is_subscriber` boolean indicating whether the chat author is a subscriber. See [event payloads](/x-api/activity/event-payloads).
- **Higher Pay-per-use Post cap**: The monthly Post read cap on Pay-per-use plans increased from 2 million to 3 million. See [Post cap](/x-api/fundamentals/post-cap).
</Update>

<Update label="Aug 13, 2026" description="X Ads API">
### Updated `video_total_views` definition

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