Hmm, both are "possible but not implemented yet". The engineering approach that some of our users do is running their own custom monitoring script (checking TCP

Hmm, both are "possible but not implemented yet". The engineering approach that some of our users do is running their own custom monitoring script (checking TCP connections, checking against a dynamic list) on their own infrastructure, and then just use Heii On-Call to monitor (via Inbound Liveness heartbeats / checkins) and alert on (via Manual trigger type) that custom monitoring script. Feel free to email us at support-at-domain so we can try to understand the use case better.