Why not just use Slack's built-in options? Even where UptimeRobot offers some form of Slack integration, it's often tied to one account, limited in which events it covers, or more than you need. ZestyGlue is a dedicated, always-on feed of exactly the events you choose, for $9/month instead of a full automation-platform subscription.
What it looks like
ZestyGlue
UptimeRobot — Down
api.example.com
https://api.example.com/health
Connection timeout
A real UptimeRobot event, shown as ZestyGlue formats it for Slack.
Setup — about two minutes
- Create the connector. In ZestyGlue, start a new UptimeRobot → Slack connector. You'll get a unique webhook URL right away.
- Point UptimeRobot at it. Go to My Settings → Add Alert Contact → Webhook, choose "Send as JSON", and paste in your ZestyGlue webhook URL.
- Point Slack at ZestyGlue. Create a Slack app (or reuse one) → Incoming Webhooks → Add New Webhook to Workspace, pick the channel, and copy the URL into ZestyGlue.
Tip: UptimeRobot sends the same alert type on both the way down and the way back up (Down, then Up) — seeing both in your channel means you always know when an incident actually resolved, not just when it started.
Events you can forward
Up
Down
SSL Expiring
Questions
Does this work with UptimeRobot's free plan?
Yes — webhook alert contacts are available on UptimeRobot's free tier, not just paid plans.
Can I monitor multiple sites with one connector?
Yes — add the same ZestyGlue webhook URL as the alert contact on as many monitors as you like.
Does this need Slack admin approval?
No app installation is required on Slack's side — an Incoming Webhook is just a URL generated once. No OAuth review, no admin approval flow.
What happens if my ZestyGlue subscription lapses?
Events are silently dropped rather than causing errors on UptimeRobot's side — UptimeRobot never sees a failure response, so it won't retry aggressively or flag your webhook as broken. Your dashboard will simply stop showing new events until you resubscribe.