SSL

SSL certificate monitor

Opens a TLS connection to your host on port 443, reads the leaf certificate, and warns before expiry. Catches forgotten renewals before they take production down.

What it checks

Connects to the target host over TLS, reads the peer certificate, and computes days-to-expiry. The check is DOWN once expiry is closer than your configured warning window (default 14 days).

When to use it

Any public-facing HTTPS service — even ones with auto-renewal (renewals fail more often than you think).
Internal services where letsencrypt or ACME is doing the renewal.
Customer-facing custom domains where you need lead time to renew.

Tip

Set the warning window to at least 2× your renewal job cadence. If your renewal runs weekly, warn at 14 days — that gives you one missed renewal of headroom before customers see a broken cert.

Create one via the API

curl https://monitorah.com/api/v1/monitors \
  -X POST \
  -H "Authorization: Bearer mon_live_…" \
  -H "Content-Type: application/json" \
  -d '{
  "name": "My SSL check",
  "type": "SSL",
  "target": "example.com",
  "config": {
    "warnDaysBefore": 14
  }
}'

Full reference for this endpoint →

Create a SSL monitor → All docs