Email
Alerts go out the moment a check fails, and again when it recovers. They go only to the addresses listed on the monitor. A new monitor starts with your account address filled in; add others, or clear the list and that monitor sends no email at all.
Clearing the list is the right setting for a test monitor you are deliberately breaking.
With Link Robins Pro, a monitor can also repeat its alert while a site stays down, and escalate to more addresses if an outage goes on.
Webhooks
Each monitor can fire a webhook on failure and recovery, on every account, free. That is how Slack, Discord, n8n or anything else that accepts a POST gets told.
The webhook carries which monitor, what happened and when, so a receiving system can decide what to do without calling back.
Discord and Slack: paste a Discord channel webhook URL or a Slack incoming-webhook URL as-is. Link Robins recognizes them and sends a proper message: a colored card in Discord, a text message in Slack. Use Test to send one. Any other URL receives the JSON described above.
What is worth alerting on
Uptime is the obvious one and the least interesting. The ones that catch real problems are certificate expiry, domain expiry, and heartbeats that stop arriving — a site that is up but not sending mail looks fine to a homepage check and is completely broken to your members.
