# Castr

**Canonical:** https://apis.io/providers/castr-live/  
**Website:** https://castr.com  
**APIs profiled:** 5

Castr is a live video streaming and multistreaming platform with video hosting (VOD), that lets you ingest a single RTMP/SRT source and restream it to multiple destinations, record and clip live streams, host and deliver on-demand video, run ultra-low-latency sub-second (WebRTC) streams, and embed a player. Castr exposes a documented, self-serve REST API at https://api.castr.com/v2 for managing live streams and their platform destinations, sub-second streams, video hosting folders and uploads, live-to-VOD recordings, activity/analytics logs and events, and webhook endpoints. Requests are authenticated with an API token issued from the account settings and sent in an authorization header.

## Kin Score — 42.7 / 100 (developing)

Scored 2026-08-24 under rubric 0.13.0. Trend: flat (-0.4 from 43.1).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 55.9 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 31.6 |
| Developer Ergonomics | 22.6 |
| Commercial Clarity | 63.2 |
| Access Clarity | 63.2 |

## Agent readiness — 19.8 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Paid (free trial) · Self-serve signup — onboarding: self-serve, pricing: paid, trial: yes (confidence: high).

## APIs (5)

- **Castr Analytics API** — Activity logs, activity events, and stream stats.
- **Castr Live Streams API** — Live streams and their multistream platform destinations.
- **Castr Sub-Second Streams API** — Ultra-low-latency (WebRTC) live streams.
- **Castr Video Hosting API** — Video hosting folders, uploads, and live-to-VOD recordings.
- **Castr Webhooks API** — Webhook endpoints for event delivery.

## Agentic access (1)

- **Castr Live Agentic Access** — 31 operations · 18 acting

## Security (2)

- **Castr Live Authentication** — apiKey · 1 scheme
- **Castr Live Domain Security** — TLSv1.2 · HSTS · DMARC

## Plans (1)

- **Castr Live Plans Pricing**

## Tags

Live Streaming, Multistreaming, Video Hosting, VOD, Video, Restreaming, Sub-Second Streaming, WebRTC, Analytics, Webhook

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/castr-live/). Scores are computed from the provider's own public artifacts under a published rubric.