Add a hostname
Port 443 is the default. Use another port when TLS is not on the usual listener.
Certificate watch
Know before a certificate expires.
SSL Clock connects to your hostnames the way a browser does, then emails you when a certificate is close to expiry or no longer checks out.
We read the certificate
Issuer, subject, names, dates, chain, and whether the name matches. No agent to install.
You get one clear note
Each threshold is sent once per certificate. A renewal, with a new expiry, can alert again.
What a failing check usually means
Expired certificates, a name that is missing from the certificate, a chain with no intermediate, or a port that no longer answers. When a check needs a human, SSL Clock adds a short likely-cause and fix. With an xAI key configured, that note is written by Grok. Without one, a built-in explanation is used, and alerts still go out.
Plans that stay small
Free covers 3 hostnames. Starter is $9 for 25. Pro is $29 for 150. Upgrade only when the list outgrows the plan.
See pricing