Monitor types

All six types are available on every plan, including Free. Every failure is independently confirmed before an incident opens — see alerting.

• HTTP(S) — Status code, keyword match, redirect policy, response time.
• SSL expiry — Warns at 30/14/7/1 days before a certificate expires.
• Domain expiry — Daily RDAP check against the public registry.
• TCP port — Raw connect check to any host + port.
• Ping — ICMP reachability.
• Heartbeat — Inbound dead-man's-switch URL for cron jobs.