Uptime monitoring
SSL/TLS monitoring
Certificate tracking and error handling.
Overview
Any HTTPS monitor also records certificate details on each check. You can see expiry for each monitor and configure how many days in advance to alert.
Certificate tracking
For every HTTPS monitor, Checkmate tracks:
- Issuer: The certificate authority that issued the certificate
- Valid from: When the certificate became valid
- Expiration date: When the certificate expires
- Days until expiry: Countdown to expiration
Expiration alerts
Checkmate sends notifications when certificates are approaching expiration. You can configure the warning threshold in monitor settings.
Set up certificate expiration alerts at least 14 days before expiry to give yourself time to renew.
Certificate errors
Checkmate detects common SSL/TLS issues:
- Expired certificates
- Self-signed certificates (unless explicitly allowed)
- Certificate hostname mismatch
- Incomplete certificate chains