Thanks — you're asking what Prometheus metrics you can collect from your realtime agent. Below is a concise summary and next steps. What you can measure • Infrastructure/autoscaling metrics ◦ livekit_egress_available — indicates whether an Egress instance can accept new requests (used for autoscaling). ◦ livekit_ingress_available — indicates whether an Ingress instance can accept new requests (used for autoscaling). • Service-level metrics ◦ Each service (Egress, Ingress, LiveKit Server) can expose a Prometheus

/metrics

endpoint when you set

prometheus_port

in the service config. This exposes standard runtime and service metrics (CPU, memory, request counts, etc.) for that instance. • Agent/framework metrics (not auto-exposed) ◦ The agents collect detailed per-component metrics/events such as: ▪︎ `LLMMetrics`: time-to-first-token (TTFT), duration, token counts ▪︎ `TTSMetrics`: time-to-first-byte (TTFB), duration, audio length ▪︎ `STTMetrics`: TTFB, duration, audio duration ▪︎

VADMetrics

/ `EOUMetrics`: timing and event data ◦ These are emitted as events and logs; they are not automatically exported to Prometheus. You can forward/transform these events into Prometheus metrics via a custom exporter or by wiring the agents'

metrics_collected

(or event hooks) into your metrics pipeline. How to enable metrics 1. Set

prometheus_port

in the config for the service(s) you want metrics from (Egress, Ingress, or LiveKit Server). This exposes the

/metrics

endpoint. 2. Point Prometheus to the exposed

/metrics

endpoints to scrape them. If you want the agent-specific LLM/TTS/STT/VAD metrics in Prometheus • Option A: Implement a small exporter that subscribes to the agent events (

metrics_collected

) and exposes Prometheus metrics. • Option B: Emit those metrics to a push gateway or statsd/metrics backend that your monitoring stack already converts to Prometheus. Would you like: • the exact config snippet for enabling

prometheus_port

in a specific service (Ingress/Egress/Server), or • a short example exporter pattern to convert agent events (LLM/TTS/STT) into Prometheus metrics? Sources: Self-hosting the Egress Service | LiveKit docs | Self-hosting the Ingress Service | LiveKit docs | Deploying LiveKit | LiveKit docs | LLM Metrics | LiveKit docs | TTS Metrics | LiveKit docs