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dotfiles/.agents/skills/cloudflare-deploy/references/realtimekit/README.md
2026-03-17 16:53:22 -07:00

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# Cloudflare RealtimeKit
Expert guidance for building real-time video and audio applications using **Cloudflare RealtimeKit** - a comprehensive SDK suite for adding customizable live video and voice to web or mobile applications.
## Overview
RealtimeKit is Cloudflare's SDK suite built on Realtime SFU, abstracting WebRTC complexity with fast integration, pre-built UI components, global performance (300+ cities), and production features (recording, transcription, chat, polls).
**Use cases**: Team meetings, webinars, social video, audio calls, interactive plugins
## Core Concepts
- **App**: Workspace grouping meetings, participants, presets, recordings. Use separate Apps for staging/production
- **Meeting**: Re-usable virtual room. Each join creates new **Session**
- **Session**: Live meeting instance. Created on first join, ends after last leave
- **Participant**: User added via REST API. Returns `authToken` for client SDK. **Do not reuse tokens**
- **Preset**: Reusable permission/UI template (permissions, meeting type, theme). Applied at participant creation
- **Peer ID** (`id`): Unique per session, changes on rejoin
- **Participant ID** (`userId`): Persistent across sessions
## Quick Start
### 1. Create App & Meeting (Backend)
```bash
# Create app
curl -X POST 'https://api.cloudflare.com/client/v4/accounts/<account_id>/realtime/kit/apps' \
-H 'Authorization: Bearer <api_token>' \
-d '{"name": "My RealtimeKit App"}'
# Create meeting
curl -X POST 'https://api.cloudflare.com/client/v4/accounts/<account_id>/realtime/kit/<app_id>/meetings' \
-H 'Authorization: Bearer <api_token>' \
-d '{"title": "Team Standup"}'
# Add participant
curl -X POST 'https://api.cloudflare.com/client/v4/accounts/<account_id>/realtime/kit/<app_id>/meetings/<meeting_id>/participants' \
-H 'Authorization: Bearer <api_token>' \
-d '{"name": "Alice", "preset_name": "host"}'
# Returns: { authToken }
```
### 2. Client Integration
**React**:
```tsx
import { RtkMeeting } from '@cloudflare/realtimekit-react-ui';
function App() {
return <RtkMeeting authToken="<participant_auth_token>" onLeave={() => {}} />;
}
```
**Core SDK**:
```typescript
import RealtimeKitClient from '@cloudflare/realtimekit';
const meeting = new RealtimeKitClient({ authToken: '<token>', video: true, audio: true });
await meeting.join();
```
## Reading Order
| Task | Files |
|------|-------|
| Quick integration | README only |
| Custom UI | README → patterns → api |
| Backend setup | README → configuration |
| Debug issues | gotchas |
| Advanced features | patterns → api |
## RealtimeKit vs Realtime SFU
| Choose | When |
|--------|------|
| **RealtimeKit** | Need pre-built UI, fast integration, React/Angular/HTML |
| **Realtime SFU** | Building from scratch, custom WebRTC, full control |
RealtimeKit is built on Realtime SFU but abstracts WebRTC complexity with UI components and SDKs.
## Which Package?
Need pre-built meeting UI?
- React → `@cloudflare/realtimekit-react-ui` (`<RtkMeeting>`)
- Angular → `@cloudflare/realtimekit-angular-ui`
- HTML/Vanilla → `@cloudflare/realtimekit-ui`
Need custom UI?
- Core SDK → `@cloudflare/realtimekit` (RealtimeKitClient) - full control
Need raw WebRTC control?
- See `realtime-sfu/` reference
## In This Reference
- [Configuration](./configuration.md) - Setup, installation, wrangler config
- [API](./api.md) - Meeting object, REST API, SDK methods
- [Patterns](./patterns.md) - Common workflows, code examples
- [Gotchas](./gotchas.md) - Common issues, troubleshooting
## See Also
- [Workers](../workers/) - Backend integration
- [D1](../d1/) - Meeting metadata storage
- [R2](../r2/) - Recording storage
- [KV](../kv/) - Session management
## Reference Links
- **Official Docs**: https://developers.cloudflare.com/realtime/realtimekit/
- **API Reference**: https://developers.cloudflare.com/api/resources/realtime_kit/
- **Examples**: https://github.com/cloudflare/realtimekit-web-examples
- **Dashboard**: https://dash.cloudflare.com/?to=/:account/realtime/kit