certminder is an open-source CLI tool for continuous monitoring and alerting of TLS certificates. It helps administrators track certificate status, receive alerts before expiry, and maintain secure PKI infrastructure. Designed for DevOps and IT professionals managing secure systems.
In the Observability & monitoring space, certminder takes a focused approach. It focuses on automating the monitoring and alerting of TLS certificate status to prevent outages and security risks. certminder is an open-source project aimed at system administrators and DevOps engineers. certminder is open source under the MIT license. It runs on the command line, and it can be self-hosted.
Behind certminder is mangrisano, and it first shipped in 2026. Development happens publicly on GitHub with 19 commits in the last 90 days. Among its 5 catalogued features are TLS monitoring, certificate alerting, and continuous scanning.
Summary written by a language model from the project’s public pages.
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