Never Double-Book Again: Real-Time Calendar Conflict Checks
A client messages 'Can we meet Thursday at 2pm?' Notis instantly searches your calendar for that time slot and tells you if it's free or already booked.
Trigger
New Message Received
Triggered in real time when your WhatsApp Business number receives an inbound message from a customer (text, media, location, or contact). Delivered via the Cloud API webhook.
Action
Find event
Finds events in a specified google calendar using text query, time ranges (event start/end, last modification), and event types; ensure `timemin` is not chronologically after `timemax` if both are provided.
Why this helps
Double-booking is mortifying and erodes trust with clients and team members. Neurodivergent founders often accept meeting requests without checking their calendar, then face the stress of canceling or the shame of missing a call.
- Prevents embarrassing double-bookings
- Enables confident 'yes' or 'no' responses immediately
- Reduces decision paralysis about scheduling
- Protects your reputation with clients
Setup
Build it in a few focused steps.
- 1Connect WhatsApp Business Account and Google Calendar to Notis.
- 2Create an automation: 'Incoming Message Conflict Check', Trigger set to 'New Message Received'.
- 3Tell Notis: 'When someone proposes a specific meeting time (e.g., "Thursday 2pm", "next Tuesday"), search my Google Calendar for events within 2 hours of that time and report any conflicts.'
- 4Set the reporting channel to notify you immediately.
- 5Test by sending a message with a specific time proposal and verify Notis reports availability.
Questions about this workflow
Can it suggest alternatives if there's a conflict?
Yes, you can configure it to also find and suggest free slots nearby if the requested time is booked.
Should it check just my primary calendar or all calendars?
You can specify. Most people check their primary work calendar but exclude personal calendars to reduce false conflicts.
What if I'm on a different time zone than the client?
Notis converts between time zones automatically. Just ensure your timezone is set correctly in your profile.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Whatsapp to Google Calendar. A trigger fires from one place; an action lands in another.
Whatsapp triggers
Google Calendar actions
Message Status Updated
Triggers when a WhatsApp message status changes. IMPORTANT LIMITATION: WhatsApp Cloud API does not provide a native polling endpoint for message status. Status updates are ONLY delivered via webhooks in real-time. This trigger cannot directly poll the WhatsApp API for status updates. This trigger will return empty results as WhatsApp does not support this operation. To track message status updates, you must: 1. Set up a webhook endpoint to receive status notifications from WhatsApp 2. Store the webhook data in your own database 3. Use a different mechanism to query your stored webhook data For more information, see: - https://developers.facebook.com/docs/whatsapp/cloud-api/webhooks
Insert Calendar into List
Inserts an existing calendar into the user's calendar list.
New Message Received
Triggered in real time when your WhatsApp Business number receives an inbound message from a customer (text, media, location, or contact). Delivered via the Cloud API webhook.
Update Calendar List Entry
Updates an existing entry on the user\'s calendar list.
Interactive Reply Received
Triggered when a customer taps a quick-reply button or selects an option from an interactive list message you sent.
Delete Calendar
Deletes a secondary calendar. use calendars.clear for clearing all events on primary calendars.
Message Template Status Update
Triggered when the review status of a WhatsApp message template changes — for example approved, rejected, or flagged — on your WhatsApp Business Account.
Update Calendar
Updates metadata for a calendar.
Clear Calendar
Clears a primary calendar. this operation deletes all events associated with the primary calendar of an account.
Create Event
Creates an event on a google calendar, needing rfc3339 utc start/end times (end after start) and write access to the calendar. by default, adds the organizer as an attendee unless exclude organizer is set to true.
Delete event
Deletes a specified event by `event id` from a google calendar (`calendar id`); this action is idempotent and raises a 404 error if the event is not found.
Create a calendar
Creates a new, empty google calendar with the specified title (summary).
Connect any two apps with Notis in the middle.
Not just Whatsapp and Google Calendar. Any combination from 985+ integrations.
When this happens · Trigger
Do this · Action
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