Real-Time Calendar Change Alerts on WhatsApp
Calendar events change constantly. Instead of people checking repeatedly, Notis sends a real-time WhatsApp notification the instant something changes.
Trigger
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).
Action
Send message
Send a text message to a whatsapp number. note: the message will reflect on the recipient's phone number only if they have texted first.
Why this helps
You reschedule a meeting but attendees don't see the change until later because they're not refreshing calendar; confusion ensues.
- Real-time sync: attendees see changes immediately, not hours later
- Reduces confusion: real-time alerts prevent people from arriving at old times or places
- Webhook-driven: faster than polling-based updates
Setup
Build it in a few focused steps.
- 1Connect Google Calendar and WhatsApp business accounts to Notis.
- 2Create a new automation: 'When a calendar event changes, send attendees a real-time WhatsApp notification with the change details.'
- 3Set the trigger to 'Calendar Event Changes' (webhook trigger).
- 4Pick your run-report channel.
- 5Test by making a quick change (time, title, etc.) to an upcoming event and verify attendees receive the WhatsApp alert.
Questions about this workflow
What qualifies as a 'change'—does it notify for every tiny edit?
You can refine it to notify only for significant changes—time, location, or attendees. Ignore minor edits like description tweaks if you prefer.
What if I make multiple changes to the same event in quick succession?
Notis can batch rapid changes into a single message or send one message per change. Tell Notis your preference.
Will this notify external attendees or only my team?
By default, all attendees. You can refine to only external guests or specific groups.
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 1,000+ integrations.
When this happens · Trigger
Do this · Action
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