When a Slack alert has not arrived

Check the channel connection

As owner, open Account → Notifications. Confirm that Slack is configured and its switch is enabled. Send a test and look in the channel connected to that webhook. The test sends a real message.

Check whether an alert was expected

Notifications follow confirmed downtime and recovery. A single failed check may not meet the monitor’s threshold. Pause, maintenance, workspace suspension or a replaced connection can prevent a pending alert from being sent.

Read Recent deliveries

Recent deliveries shows the latest ten entries across channels. Use the Slack icon and monitor information to identify the relevant attempt. A retry can take time after provider rate limiting or a temporary failure.

If the webhook was revoked or its destination changed, replace it with a working connection and test again. Never include the webhook URL in a support screenshot.