Use the Restream API to schedule an event and attach multistream fan-out destinations
domain: developers.restream.io · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Register an OAuth2 application at developers.restream.io/apps to get a Client ID/Secret and set a redirect URI, then complete the OAuth2 authorization-code flow to obtain a user access token with the needed scope (e.g. stream.write).
Call POST /v2/user/events/new with streamType set to "studio", "encoder", or "file" (to play a previously uploaded Video Storage file) to schedule an event; the event is created with zero destinations attached.
Attach each fan-out destination separately via POST /v2/user/events/{eventId}/destinations with an existing channelId and streamingOrientation ("horizontal"/"vertical").
Check the destination platform allowlist before relying on this for fan-out: it currently covers Custom RTMP/SRT/WHIP/HLS, Mux, Embed Player, Amazon Live, Telegram, Substack, Mixcloud, Nimo, Naver, and Steam.
Monitor events via the Upcoming/In-Progress/History event-list endpoints or the private Streaming Updates WebSocket; a separate Chat API covers the aggregated multistream chat.
Known gotchas
The public Events API's destination-attachment endpoint explicitly excludes YouTube, Facebook, Instagram, TikTok, LinkedIn, and X — the major-platform fan-out Restream is best known for is NOT automatable through this public endpoint; it only reliably covers the smaller/custom platform list above.
Creating an event and attaching a destination are two separate calls — a bare 'create event' request produces an event with no destinations until you call Add Event Destination.
Looping a "file"-type event (loopsCount > 0) requires a looping feature on the account's plan; otherwise the API returns an EventLoopingNotAvailable error.
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