How to Get Notified on Slack When an Event is Booked?

Get instant alerts where you already work. By connecting Cal ID to Slack via Zapier, Pabbly, Make, or ViaSocket, you'll know the moment a booking happens — no need to watch your email.


Why use this


  • Instant alerts: know immediately when a new client books you.
  • Team sync: post notifications to a shared channel.
  • One place: track new bookings, reschedules, and cancellations without leaving Slack.


Step 1: Install an automation app in Cal ID


  1. Log in to Cal ID and open the App Store.
  2. Find Zapier (or your automation tool) and click Install.
  3. Generate the API key and copy it.


Step 2: Create the automation (Zap)


Log in to Zapier and build it in three steps.


Trigger — when this happens:


  • App: Cal ID
  • Event: Booking Created
  • Account: connect your Cal ID account (paste your API key if asked)


Action — do this:


  • App: Slack
  • Event: Send Channel Message (to alert a team) or Send Direct Message (just you)
  • Message: write your alert, using Insert Data to include the booker's name and meeting time.



Finish: click Test to see a sample message in Slack, then Publish.


Other useful triggers


Create separate Zaps for these events too:


  • Booking Rescheduled — get an alert if a client moves the meeting.
  • Booking Cancelled — know instantly when a slot frees up.

Updated on: 04/08/2026

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