Draft changelog: weekly roundup for Aug 26

[mintlify]

Summary

Adds an Aug 26, 2026 changelog entry covering product changes shipped since the last entry (Aug 13).

Changes

• New: GET /2/usage/credits endpoint for checking Pay-Per-Use credit balance
• New: broadcast.start and broadcast.end events in the X Activity API
• Update: Pay-Per-Use monthly Post cap raised to 3 million reads
• Fix: Trends by WOEID response corrected (no tweet_count)

Context

Sourced from PRs merged to this repo since Aug 13 (#329, #324, #315) and the Pay-Per-Use post cap update. Docs-only changes (nav fixes, customer directory) were excluded.

[mintlify]

Preview deployment for your docs. Learn more about Mintlify Previews.

Project	Status	Preview	Updated (UTC)
x-corp	🟢 Ready	View Preview	Aug 26, 2026, 6:02 PM

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}