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Full detail: Where this data comes from
Castr is a live video streaming, multistreaming, and video-hosting (VOD) platform. You ingest a single RTMP or SRT source and Castr restreams it to multiple destinations (YouTube, Facebook, custom RTMP, and more), records and clips live streams, hosts and delivers on-demand video, runs ultra-low-latency sub-second (WebRTC) streams, and embeds a player.
Castr exposes a documented, self-serve REST API at https://api.castr.com/v2. You create a Castr account, generate an API token from the account settings API section (https://castr.com/app/manage/api), and send it in an authorization header. The API covers live streams and their multistream platform destinations, sub-second streams, video hosting folders and uploads, live-to-VOD recordings, activity logs/events and stream stats, and webhook endpoints.
APIs.json: https://raw.githubusercontent.com/api-evangelist/castr-live/refs/heads/main/apis.yml
- Public and self-serve. Anyone can sign up, get an API token from settings, and call the documented API. No sales contact or partner gating is required to read the reference or obtain a token.
- Included with a paid plan. API access ships with Castr subscription plans (a free trial is offered). Concurrency, bandwidth, and storage scale with the tier rather than the API being locked behind an enterprise-only plan.
- Auth: API token in an
authorizationheader (confirmed by a published curl example). Base URLhttps://api.castr.com/v2; resource paths are snake_case (e.g./live_streams).
Endpoint paths, methods, and resource groupings in this entry come from Castr's published developer reference and its machine index (developers.castr.com, including llms.txt). The request/response JSON schemas in the OpenAPI are honestly modeled from the documentation rather than copied from a Castr-published OpenAPI file, so property-level detail should be verified against the live reference (endpointsModeled: true in review.yml).
- Live Streaming
- Multistreaming
- Video Hosting
- VOD
- Restreaming
- Sub-Second Streaming
- WebRTC
- Analytics
- Webhooks
- Created: 2026-07-11
- Modified: 2026-07-11
Create, list, get, update, and delete live streams; retrieve stream stats and the live EPG; and manage the multistream platform destinations a stream restreams to. Streams ingest RTMP or SRT and fan out to multiple destinations and CDNs.
- Human URL: https://developers.castr.com/reference/get_v2-live-streams
- Base URL:
https://api.castr.com/v2
Create, list, get, update, and delete sub-second (ultra-low-latency, WebRTC-based) streams for interactive and real-time use cases where standard HLS latency is too high.
- Human URL: https://developers.castr.com/docs/create-sub-second-streams
- Base URL:
https://api.castr.com/v2
Manage video hosting folders and contents, create direct upload URLs for on-demand videos, retrieve temporary live-stream recordings, and convert live recordings into permanent VOD assets (Live-to-VOD).
- Human URL: https://developers.castr.com/docs/post-a-video
- Base URL:
https://api.castr.com/v2
Retrieve activity logs and events for a stream or video and pull per-stream stats (online status, duration, bitrate, codec, viewers) for real-time monitoring.
- Human URL: https://developers.castr.com/docs/create-a-livestream-pu
- Base URL:
https://api.castr.com/v2
Register, list, update, and delete webhook endpoints so Castr can push stream and video lifecycle events (online/offline, recording ready, upload complete) to your own systems.
- Human URL: https://developers.castr.com/reference
- Base URL:
https://api.castr.com/v2
Castr does not expose a documented public WebSocket API. Its own API is request/response REST, and push-style event delivery to developers is via outbound HTTP webhooks, not WebSocket. The realtime media transports — RTMP/SRT ingest, HLS/WebRTC delivery, and RTMP restreaming — are media protocols, not a subscribe-style WebSocket API, so no AsyncAPI document was created. See review.yml.
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FN: Kin Lane Email: kin@apievangelist.com