WEBHOOKS & API

Flexible webhooks for every booking workflow

Turn every booking, payment, reminder, reschedule, and cancellation into a real-time action. Connect Zencal with your CRM, sales stack, support tools, or a custom backend without waiting for a native integration.

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Real-time POST requests Custom timing Works with any endpoint

Webhook deliveries

4,328 delivered today · 99.9% success

Live

appointment.scheduled

POSThooks.slack.com/services/T0ABC/B1XYZ/…

200 48 ms
now
payment.completed

POSTapi.stripe.com/v1/webhooks/endpoint

200 32 ms
3s ago
appointment.reminder.24h

POSTapi.hubspot.com/automation/v4/actions

200 21 ms
8s ago
appointment.rescheduled

POSTyour-api.example.io/zencal/webhook

200 56 ms
15s ago

Triggers

Fire webhooks at the perfect moment

Choose exactly when Zencal should send data, from instant booking events to custom reminders before or after an appointment.

Appointment scheduled

Triggered instantly when a client books a new appointment.

Before an appointment starts

Send reminders minutes, hours or days before the appointment.

Appointment rescheduled

Get notified when clients change their booking time.

Appointment cancelled

React immediately when an appointment is cancelled.

Payment completed

Trigger actions when payment is successfully processed.

Custom timing

Set any custom time before or after events.

Data payload

Rich JSON data with every webhook

Every webhook includes comprehensive appointment data. Use it to sync with your CRM, trigger e-mail sequences or update your database.

Appointment UUID & event type

Attendee name & email

Date, time & timezone (ISO8601)

Appointment location & video link

Payment link (for paid appointments)

Custom form data & UTM parameters

webhook-payload.json

{
  "event": "appointment.scheduled",
  "meetingUuid": "abc123-def456",
  "date": {
    "start": "2025-01-15T10:00:00Z",
    "end": "2025-01-15T10:30:00Z"
  },
  "attendee": {
    "name": "John Smith",
    "email": "john@example.com"
  },
  "subject": "Strategy Consultation",
  "place": "google_meet",
  "meetLink": "https://meet.google.com/...",
  "payment_link": "https://...",
  "reschedule_link": "https://...",
  "cancel_link": "https://...",
  "formData": {
    "company": "Acme Inc",
    "phone": "+1234567890"
  }
}

Use cases

Build automations around the way your business works

Pre-appointment reminders

Send a webhook 15 minutes before an appointment starts. Use it to trigger a push notification, SMS or Slack message with the appointment link and participant details.

Slack SMS Push

Payment collection

Trigger a webhook 7 days before an appointment to send automated payment reminders. Include the payment link directly in your e-mail template.

Stripe Email Invoice

CRM synchronisation

Automatically create or update contacts in your CRM when appointments are booked. Keep your sales pipeline in sync without manual data entry.

HubSpot Salesforce Pipedrive

Custom workflows

Use Zapier, Make, n8n, or your own API to connect Zencal with the tools your team already uses. Keep the booking experience simple while your workflow runs in the background.

Zapier Make N8N

How it works

Set up webhooks in minutes

Go to notifications

Open your appointment type settings and find the notifications tab.

Create webhook

Select "Webhook" as notification type and enter your URL.

Set timing

Choose when to fire: on event, or X minutes/hours/days before.

Receive data

Zencal sends a POST request with JSON payload to your endpoint.

Team webhooks

Configure different webhook URLs for each team, service, or process. Route notifications to the right department automatically, so sales, operations, support, and finance can each run their own workflow from the same booking system.

Get started

Integrations

Connects to the tools you already use

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