> ## Documentation Index
> Fetch the complete documentation index at: https://docs.phinite.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Usage Metrics

> Track sessions, token usage, and telephony metrics.

## Metrics

* [Session Count](/observability/metrics/session-count)
* [Token Usage (LLM, STT, TTS)](/observability/metrics/token-usage)
* [Telephony Metrics](/observability/metrics/telephony)

## Best practices

* Alert on abnormal spikes
* Correlate with deployments
* Break down by assistant/environment