Monitoring the capture service with Grafana MCP

The capture service (rust/capture/) is PostHog's Rust HTTP ingestion endpoint. It receives events from SDKs, applies quota/rate limits, and produces to Kafka. Five deployments run the same binary with different CAPTURE_MODE configs, each in its own K8s namespace.

This skill teaches how to discover live metrics using the Grafana MCP tools rather than memorizing metric names that change as the code evolves.

Environment context

The Grafana MCP is connected to a single Grafana instance scoped to one environment. If the user hasn't specified, ask which environment they want to investigate:

• prod-us — US production (us-east-1)
• prod-eu — EU production (eu-central-1)