Automated Cancellation Notices Sent to WhatsApp
Accidentally canceled a meeting? Notis sends an immediate WhatsApp template to everyone saying so, plus the rescheduled time if you have one.
Trigger
Event Canceled or Deleted
Triggers when a Google Calendar event is cancelled or deleted. Returns minimal data: event_id, summary (if available), and cancellation timestamp.
Action
Send template message
Send a template message to a whatsapp number.
Why this helps
Canceling a calendar event doesn't notify everyone, so you end up texting or emailing people manually, creating multiple notification channels.
- Instant broadcast: everyone gets the message in seconds instead of your sending individual texts
- Professionalism: template messages read polished and include all relevant details
- Single source of truth: attendees see the cancellation on the same channel you use for other event updates
Setup
Build it in a few focused steps.
- 1Ensure Google Calendar and WhatsApp business accounts are connected to Notis.
- 2Create a new automation with the prompt: 'When a calendar event is canceled, send a WhatsApp template message to all attendees informing them the meeting is off and asking if they want details on the new time.'
- 3Set the trigger to 'Event Canceled or Deleted'.
- 4Specify which channel Notis should use to report successful sends.
- 5Test by canceling a dummy calendar event and confirming the template message is delivered to attendees.
Questions about this workflow
Can Notis automatically reschedule events or just notify about cancellations?
Notis can send a template message that tells attendees the new time if you provide it. To fully automate rescheduling, you'd need a separate automation that creates the new event.
What if I only want to notify certain people about the cancellation?
You can refine the automation with rules like 'Only notify external attendees' or 'Exclude anyone with the tag Internal Team.'
Do I have to pre-approve the WhatsApp template message?
Yes, WhatsApp requires pre-approved templates for messaging outside the 24-hour window. You'll need to submit your cancellation template to WhatsApp for approval first, which takes 24-48 hours.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Google Calendar to Whatsapp. A trigger fires from one place; an action lands in another.
Google Calendar triggers
Whatsapp actions
Attendee Response Changed
Polling trigger that fires when any attendee's RSVP changes to accepted, declined, or tentative. Returns attendee info and current status.
Create message template
Create a new message template for the whatsapp business account. templates must be approved by whatsapp before they can be used. templates are required for marketing messages and messages sent outside the 24-hour window.
Event Canceled or Deleted
Triggers when a Google Calendar event is cancelled or deleted. Returns minimal data: event_id, summary (if available), and cancellation timestamp.
Delete message template
Delete a message template from the whatsapp business account. this permanently removes the template and it cannot be recovered. only delete templates that are no longer needed.
Event Starting Soon
Triggers when a calendar event is within a configured number of minutes from starting. Returns event details, time remaining, attendees, and join links when available.
Get business profile
Get the business profile information for a whatsapp business phone number. this includes business details like description, address, website, and contact info.
Calendar Event Changes
**SOON TO BE DEPRECATED** - Use Calendar Event Sync (polling trigger) instead. Real-time webhook trigger for calendar event changes. Returns event metadata only. For full event data, use Calendar Event Sync (polling trigger).
Get media
Get information about uploaded media including a temporary download url. the download url is valid for 5 minutes and can be used to retrieve the actual media file. this is useful for downloading media that was sent to your whatsapp number.
Event Created
Polling trigger that fires when a new calendar event is created. Returns event ID, summary, start/end times, and organizer info.
Get media info
Get metadata about uploaded media without generating a download url. this is useful for checking file size, type, and hash without downloading the file. use get media if you need the actual download url.
Calendar Event Sync
Polling trigger that returns full event data including details, attendees, and metadata. For real-time notifications with basic info, use Calendar Event Changes (webhook).
Get message templates
Get all message templates for the whatsapp business account. templates are required for sending messages outside the 24-hour window and for marketing/utility messages.
Event Updated
Triggers when an existing Google Calendar event is modified. Returns the event ID, change type, and the specific fields that changed with their previous and new values.
Get phone number
Get details of a specific phone number associated with a whatsapp business account.
Get phone numbers
Get all phone numbers associated with a whatsapp business account (waba).
Connect any two apps with Notis in the middle.
Not just Google Calendar and Whatsapp. Any combination from 985+ integrations.
When this happens · Trigger
Do this · Action
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