Cardinal: Prometheus and Loki cardinality explorer

Cardinal shows which jobs, metrics and labels make up your active Prometheus series, and which services and labels create your Loki log streams and volume. Pick what to drop, check where it is used, and export the result.

Series by job, metric and label, with churn and histogram bucket analysis
Log streams, labels, volume and repeated line patterns
Rules for Prometheus relabel configs, Grafana Alloy, Promtail and Grafana Adaptive Metrics and Logs
An MCP endpoint so an AI agent can analyse your data and propose rules

Cardinal runs in your browser and needs JavaScript. The source is on GitHub.