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Book on WhatsApp Chat lets your customers schedule, reschedule, and cancel meetings directly in a WhatsApp conversation, with no external booking page. Instead of sending a link like cal.id/your-name, customers complete the whole booking inside WhatsApp.

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How it works

When a customer messages your WhatsApp Business account, they can book in a few steps:
1

Open a chat

The customer opens a chat with your WhatsApp Business number.
2

Send a prompt

They send a prompt such as “Book a call”.
3

Select the event type

They pick which event type they want to book.
4

Choose a date and time

They select an available date and time slot.
5

Fill in the booking questions

They answer the questions attached to that event type.
6

Confirm

They confirm the booking.
Once confirmed, the meeting is created in Cal ID, the attendee gets a confirmation card in WhatsApp, and both host and attendee get a confirmation email with the event name, date and time, and location (Google Meet, Zoom, Teams, or in person) — all without leaving WhatsApp.

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Benefits

This is especially useful for businesses that get most of their leads through WhatsApp.

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Before you begin

Make sure your WhatsApp Business account is integrated with Cal ID and active, and that you have at least one active event type. See Integrate WhatsApp Business for the full setup.

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Enable Book on WhatsApp

1

Open your installed apps

Go to Apps → Installed Apps.
2

Find WhatsApp Business

Open the Messaging sub-category and find WhatsApp Business.
WhatsApp Business app card listed under the Messaging sub-category on the Installed Apps page

Finding the app to switch on

3

Turn on the toggle

On the WhatsApp Business card, turn on the Book on WhatsApp toggle.

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Configure the experience

Click the Settings (⚙️) icon next to the toggle to customize how booking appears.
Book on WhatsApp settings panel with the preview image, default meeting type, time slots layout, greeting message and booking button label fields

Tailoring the in-chat booking card

Click Save at the bottom of the settings panel to go live.

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The customer experience

The customer taps the booking button, and the scheduling views open natively in WhatsApp. They select the event type, date, and time, enter their details, and confirm.
WhatsApp chat showing the list of bookable event types

Selecting an event type in WhatsApp

WhatsApp chat showing available dates and time slots

Choosing a date and time slot in WhatsApp

WhatsApp chat showing the booking questions form

Filling in the booking questions

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Reschedule or cancel from chat

Customers manage bookings with text commands, with no dashboard login. Reschedule: the customer sends “Reschedule my booking”. The bot shows upcoming bookings, and the customer taps one and picks a new slot.
WhatsApp chat listing upcoming bookings for rescheduling

Rescheduling a booking from a WhatsApp chat

Cancel: the customer sends “Cancel my booking”. The bot shows active bookings, and the customer taps one to cancel.
WhatsApp chat listing active bookings for cancellation

Cancelling a booking from a WhatsApp chat

After any change, the attendee gets an updated confirmation card.
WhatsApp confirmation card showing the updated date, time and location for the booking

Confirming the change went through

If your event type requires confirmation, the attendee sees a Booking requested status first.
WhatsApp card showing a Booking requested status for a meeting that still needs the host's confirmation

Waiting on host approval

Once confirmed, a receipt card shows the event and host name, date, time and timezone, location or video link, attendee details, and status.
WhatsApp receipt card listing the confirmed event and host name, date, time and timezone, location, attendee details and status

Reading the final booking receipt

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FAQ

Yes, using text prompts like “cancel” or “reschedule”.
Yes. Slots are pulled from Cal ID in real time.
Yes, the moment the customer confirms.

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Troubleshooting

If the booking option doesn’t appear:
1

Check the connection

Confirm WhatsApp Business is connected under Apps → Installed Apps.
2

Check the toggle

Make sure Book on WhatsApp is on.
3

Check your event types

Ensure you have at least one active event type.
4

Save your changes

Click Save after any configuration change.
Still stuck? Contact the support team at support@cal.id.

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More WhatsApp setup

Integrate WhatsApp Business

Connect your WhatsApp Business number to Cal ID.

Connect the WhatsApp Business app

Link an existing WhatsApp Business app on your phone.

Workflows overview

Automate reminders and follow-ups around your bookings.

Share your Cal ID URL

Find and share your booking link across other channels.

Related topics

Integrate WhatsApp BusinessConnect with WhatsApp Business AppWorkflows Setup to Cal IDSchedule a MeetingFind and Share Your Cal ID URL