Calendly

Connect Calendly and people who book with you get a WhatsApp confirmation right away, with the time and the joining link, and a message if the booking is cancelled.

Before you start

A paid Calendly plan. Calendly offers webhooks only on paid plans.
An approved WhatsApp template for each message, for example a booking confirmation. See Create a WhatsApp template. Most templates are approved within 24 hours.
A phone number from the invitee. In the Calendly event type's settings, turn on text reminders, so Calendly asks for a phone number when someone books.

Where to find your Calendly keys

In our app	Where it comes from
Personal Access Token	In Calendly, open Integrations & apps, then API and webhooks, and generate a personal access token. Copy it.
Webhook Signing Key	You make this up yourself: any long, random password. You send the same text to Calendly when you create the webhook (step 5 below).

Connect Calendly

Open Calendly in the app
In the left sidebar, click Integrations. Under Scheduling, find Calendly and click Connect.
Add your Calendly keys
Under Add your Calendly keys, paste the Personal Access Token and type your Webhook Signing Key.
Step 1: your Calendly token and a signing key you made up
Choose a message for each event
Under Choose a message for each event there are two events: Meeting Scheduled and Meeting Cancelled. Click one, pick a Template, leave Send it to on Invitee Phone (if collected), and fill the blanks, for example Invitee Name, Event Type Name, Meeting Start Time and Join URL.
Step 2: one template for each event
Click Connect Calendly
Click Connect Calendly in the bar at the bottom, then copy the URL under Paste this URL in Calendly.

Create the webhook in Calendly

Calendly creates webhooks through its API, not from a screen. Send this request once, from a terminal or any API tool, or ask your developer. Replace the four capitalised values:

curl -X POST https://api.calendly.com/webhook_subscriptions \
  -H "Authorization: Bearer YOUR_PERSONAL_ACCESS_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "url": "THE_URL_YOU_COPIED",
    "events": ["invitee.created", "invitee.canceled"],
    "organization": "YOUR_ORGANIZATION_URI",
    "user": "YOUR_USER_URI",
    "scope": "user",
    "signing_key": "YOUR_WEBHOOK_SIGNING_KEY"
  }'

Your organization and user URIs come from https://api.calendly.com/users/me, called with the same token. The signing_key must be exactly the Webhook Signing Key you typed in our app.

Check that it works
Book a test meeting and give a phone number for text reminders. On the Calendly page in our app, open the Activity tab. You should see Sent, Message sent.

What you can put in the message

In Fill the variables	What it holds
Invitee Name, Invitee Email	The person who booked
Invitee Phone (if collected)	The number they gave for text reminders
Event Type Name	For example Styling call
Meeting Start Time	The start time in UTC, written like `2026-10-02T05:30:00.000000Z`
Join URL	The video call link, if the meeting has one

The start time looks technical

Calendly sends the time in UTC in a computer format. If that looks odd in your message, leave the time out and say "your booking is confirmed" instead. The customer already has the time in Calendly's own email.

Change, pause or disconnect

Change a message: open the event, make your change, then click Save changes.
Pause: switch Active off on the right.
Disconnect: click the ⋮ button at the top right, then Disconnect, and confirm.

If a message did not go out

What you see in Activity	What to do
Not sent, No phone number in the field you picked	The invitee did not give a phone number. Turn on text reminders in the event type.
Rejected, The webhook secret did not match	The signing_key you sent to Calendly and the Webhook Signing Key in our app must match. If you created the webhook without a signing key, create it again with one.

More fixes are in Troubleshooting.