Show HN: LetsMonitor.org beta – free monitor for website certificate expirations (letsmonitor.org)

LetsEncrypt sends emails when the expiration is close, so this is a supplemental service on top of LetsEncrypt's notifications.

This works on all website certs, not just LetsEncrypt ones.

What if the site is down? Does this monitor for that?

Yes, LetsMonitor will send alerts when the site is down or the certificate cannot be acquired

This is needed. The dashboard show all the expiration countdowns, but not the error if the TLS certificate is broken.

You can see the full log of errors with diagnostics from the 'Results Log' menu item. You're right, there should be a link to the log from the dashboard items.

How often does it check each certificate?

Right now every hour (it may change). The service round robins checks from monitoring stations basically at AWS and Rackspace datacenters. This makes sure the site is reachable from points around the planet and that the certificate is functioning properly. So, in a way it can be used as an external site monitor for downtime. However, that is not its main purpose.

Is there an api?

There is an API - REST/JSON based but not yet documented. It will be available soon. With the API, you can get results to pull into your own systems. The application is 100% API based, including being able to add your own monitors without going through the website.

Go LetsEncrypt!

Ideally, I would incorporate this into my existing dashboards