Personally I just integrate these checks into existing monitoring systems. For example, for sensu I use: https://github.com/sensu-plugins/sensu-plugins-ssl http

Personally I just integrate these checks into existing monitoring systems. For example, for sensu I use: https://github.com/sensu-plugins/sensu-plugins-ssl https://github.com/sensu-plugins/sensu-plugins-ssl Domain expiry is also another one people sometimes miss that should be integrated into existing monitoring.