CertPost

What it does

CertPost monitors SSL/TLS certificates by opening a live connection and reading the certificate your server actually presents — not the renewal log, not CT logs. It validates the full chain (including intermediates), checks hostname match, and alerts by email or webhook at 30/14/7/1 days before expiry. Works on any TLS port (HTTPS, SMTP, IMAPS, custom). Free plan monitors 3 certificates forever, no card. Paid from $29/month for unlimited certificates — flat, not per-certificate.

SSL certificate monitoring that reads the cert your server serves: expiry, chain, hostname, any TLS port. Alerts at 30/14/7/1 days. 3 free forever. Unlimited from $29/mo.

We read the certificate your server actually serves. Expiry, chain, hostname, any TLS port. Four warnings before it matters, on your schedule rather than on expiry day. No signup, no email. A live TLS read of what your visitors get. The certificate lifetime the industry is moving to. Nine renewals a year, each one a chance to fail quietly. Renewals a year per certificate. Nine chances to fail quietly. Between checks on Agency. Hourly on Team, daily on the free tier. Four things worth watching, and nothing else competing for your attention. An intermediate that expires before your leaf takes the site down just the same. Every link is validated on every check. We lost krypto.plus to an expiry…from certpost.ai

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