Thanks for reaching out! I wanted to let you know that LiveKit doesn’t have a webhook exactly named

call_started

, but no worries — you can use the

room_started

webhook instead. This one triggers when the very first participant joins a room and the room gets created, so it’s the best way to detect when a session begins. Here’s how you can use the

room_started

webhook: • Set up your webhook endpoint in the LiveKit Cloud dashboard under Settings, or if you’re self-hosting, in the

webhook

section of your config file. • LiveKit will send an HTTP POST request to your specified URL with a JSON payload whenever the event happens. • Make sure to validate the payload using a server SDK to confirm it’s authentic. Also, if you’re working with the LiveKit Agents for Ultravox plugin, there’s a special

CallStartedEvent

sent via WebSocket for real-time voice AI communication. Feel free to ask if you’d like more details about that or anything else — I’m here to help! Sources: livekit-api/tests/test_webhook.py | livekit/livekit_analytics.pb.go | livekit-protocol/src/livekit.rs | livekit-plugins/livekit-plugins-ultravox/livekit/plugins/ultravox/realtime/... | Webhooks | LiveKit Docs