SSL certificate monitoring

SSL certificate monitoring, included with every HTTPS check

An expired certificate takes a site down as surely as a crashed server, with a scary browser warning on top. Every HTTPS website and API monitor records when its certificate expires and warns you in time to renew.

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https://shop.example.com

⚠ SSL expires in 12 days (Oct 13, 2026)

A certificate close to expiry

No extra setup

Expiry is read from every HTTPS check. Add a website or API monitor and it's covered.

One warning per certificate

You're alerted once, 14 days before expiry. A renewed certificate resets the warning automatically.

Invalid certificates fail

Untrusted, mismatched or expired certificates make the check fail, so you hear about those immediately.

How to set it up

1Add a website or API monitor with an https:// address.
2See the days left on the monitor's page.
3Get an alert through your channels 14 days before it expires.

The details

Warning: 14 days before expiry, once per certificate
Covered: Every HTTPS website and API monitor
Invalid certificate: Check fails and an incident opens
Plan: Free and Pro

Questions

Does it work with Let's Encrypt?: Yes. Any certificate the server presents is checked, and automatic renewals reset the warning.
Will I get warned every day?: No. You get one warning per certificate. If you renew, the new certificate gets its own warning when it nears expiry.

Website monitoringKnow when a page stops loading, or loads broken.API monitoringSend real requests and assert on the JSON that comes back.AlertsSlack, Discord, email and webhooks, the moment something breaks.

Set up ssl certificate monitoring in under a minute

Included on the Free plan. No card needed.

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