NK built-in ping / port / HTTP / DNS monitor. All plans (Free too).
Monitor types
- ICMP ping — basic reachability
- TCP port — open/close
- HTTP/HTTPS — status + latency + keyword match
- DNS — resolve specific RR (A/AAAA/TXT)
Fields
- name / kind / target / port / interval_secs / timeout_secs
- expected_status / keyword / notify_channels (email/webhook)
Failure / recovery
N consecutive failures → mark "down" + alert (N defaults to 3 for debounce). M consecutive successes → "recovery" notification.