# CMetrics > DISCLAIMER: THIS LIBRARY IS STILL IN ACTIVE DEVELOPMENT The [CMetrics](https://github.com/calyptia/cmetrics) project is a standalone C library to create and maintain a context of different sets of metrics with labels support such as: - Counters - Gauges - Histograms - Summaries This project is heavily based on Go Prometheus Client API design: - https://pkg.go.dev/github.com/prometheus/client_golang/prometheus#section-documentation ## License This program is under the terms of the [Apache License v2.0](http://www.apache.org/licenses/LICENSE-2.0). ## Authors [Calyptia Team](https://www.calyptia.com)