Web app that shows per-stream engagement timelines for Twitch streamers including chat peaks, follow spikes, and sub moments not available via the Twitch API

Twitch exposes no API endpoints for historical per-stream analytics. Streamers can see aggregate daily CSV exports but cannot query which minute of a given stream drove the most chat engagement, follows, or subscriptions. The dashboard shows this data natively but Twitch explicitly refuses to expose it via API. Third-party tools SullyGnome and TwitchTracker only aggregate channel-level statistics across streams, not moment-level data within a stream. StreamBee captures this via live polling but only during the stream itself. A web app that reverse-engineers the session-authenticated dashboard endpoints (or polls EventSub in real time) to build a per-stream retrospective timeline would fill a real commercial gap.