Slack
A message in your channel the moment something breaks
On this page6
Your customers find out from your status page. Your team should find out sooner, in the place they are already looking.
Dashboard → Alerts → Channels, then Add channel → Slack. This requires the Slack alerts capability, which sits on top of Monitoring.
Setting it up
- Create an incoming webhook in your Slack workspace for the channel you want.
- Paste the webhook URL into Slack webhook for down/recovered alerts and choose Save webhook.
- If the screen asks you to confirm it is you, choose Email me a confirmation link, open the link in the same browser, then save the webhook again.
There is no test button. The first message arrives with the next monitor alert.
What arrives
A message when a monitor goes down, and a message when it recovers, naming the service and the time. A warning also arrives when a certificate is close to expiry. Domain-registration warnings are coming soon.
Slack posts every change. The same down and recovered alerts also go by email to the account's address and to every active owner and admin, at most once per monitor every 30 minutes, so a service that keeps failing and recovering shows each change in the channel without filling anyone's inbox. See Alerts to your team.
These follow the monitor state directly, so they arrive after two consecutive failed checks, not after the fifteen-minute grace that governs publishing to your customers. That gap is the point: your team hears about it during the window in which fixing it quietly is still an option.
Choosing the channel
Send it where somebody is actually on call. A channel that pages the right people beats a general engineering channel where a red message at 03:00 scrolls past unread.
Incidents in chat
Slack carries monitor alerts. If what you want in a channel is the incidents and maintenance you publish, the same stream your subscribers get, use a Discord, Microsoft Teams or Telegram destination. The WhatsApp guide describes both kinds of alert on a named person's phone; production delivery remains disabled.
Somewhere other than chat
For your own systems, an on-call tool, a bot, an internal dashboard, use webhooks: signed HTTP POSTs for the events you pick, with delivery logs and redelivery. The Billing screen shows the webhook capacity enabled for this account.