Integration

Every booking,
automated without code

Astrocal fires a signed webhook on every booking event. Point it at a Zapier Webhooks trigger and connect to 8,000+ apps. No code required.

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Manual follow-ups after meetings waste time and drop the ball

has to remember the follow-up after every booking. Someone forgets.

Without automation, a person has to send the welcome email, update the spreadsheet, and notify the team. Webhooks into Zapier remember every time.

is the workflow between your booking tool and everything else

Copying data between apps, sending confirmation messages, updating project boards. Repetitive work that compounds every week.

apps your booking data can reach through Zapier

The booking data exists. With booking.created webhooks wired to Zapier, it flows to the tools where it's needed.

How Zapier works with Astrocal

ClientBooks a meeting via your link or widgetPicks from your real-time availability

AstrocalFires a signed webhookbooking.created with attendee details and event type

ZapierReceives the webhook and triggers your ZapWebhooks by Zapier catches the event

Any appRuns your actions: Slack, Sheets, email, CRM, anything8,000+ app connections, no code required

Client: Books a meeting via your link or widget

Picks from your real-time availability

Astrocal: Fires a signed webhook

booking.created with attendee details and event type

Zapier: Receives the webhook and triggers your Zap

Webhooks by Zapier catches the event

Any app: Runs your actions: Slack, Sheets, email, CRM, anything

8,000+ app connections, no code required

Integration capabilities

Capability	Supported	Notes
Webhook on booking created	Yes	Fires immediately when a booking is confirmed
Webhook on booking cancelled	Yes	Fires when a booking is cancelled by host or invitee
Webhook on booking rescheduled	Yes	Fires with both old and new time slots
Signed webhook payloads	Yes	HMAC-SHA256 signature for verifying authenticity
Automatic retries	Yes	Up to 6 retries with exponential backoff on failure
Delivery logs in dashboard	Yes	See every delivery attempt, status code, and response body
Native Zapier app	No	Connect via Webhooks by Zapier. Works identically, no app install needed
Zapier actions → Astrocal	No	One-way: Astrocal pushes events to Zapier. Use the REST API for the reverse.

Webhooks available on all plans including Free.

Three steps to connect Astrocal to anything

Create a Zap with Webhooks by Zapier

In Zapier, create a new Zap and choose 'Webhooks by Zapier' as the trigger. Select 'Catch Hook'. Zapier gives you a unique webhook URL.

Register the URL as an Astrocal webhook

In the Astrocal dashboard or via the API, create a webhook endpoint with the Zapier URL. Subscribe to booking.created, booking.cancelled, and booking.rescheduled events.

Add actions: Slack, Sheets, email, CRM, anything

Back in Zapier, add action steps. Send a Slack message when someone books. Add a row to Google Sheets. Create a Trello card. Update a HubSpot contact. Whatever your workflow needs.

{
  "event": "booking.created",
  "data": {
    "id": "bk_abc123",
    "event_type_id": "evt_xyz789",
    "start_time": "2026-04-15T14:00:00Z",
    "end_time": "2026-04-15T14:30:00Z",
    "invitee": {
      "name": "Jane Smith",
      "email": "jane@acme.com"
    },
    "status": "confirmed"
  }
}

Pair Zapier with Google Calendar, Stripe, and more

Google Calendar

Connect your calendar so availability is always accurate. The booking that triggers your Zap started with a real open slot.

Learn about Google Calendar

Stripe

Require payment at the time of booking. The Zapier webhook fires after payment clears, so your Zap knows the booking is paid.

Learn about Stripe

HubSpot

Use Zapier to push bookings into HubSpot without building custom middleware. One Zap replaces a webhook receiver.

Learn about HubSpot

Frequently asked questions

Not yet. You connect via 'Webhooks by Zapier', a built-in Zapier trigger that catches incoming webhooks. It works identically to a native app trigger: you get the full booking payload and can map fields to any Zapier action.

The webhook payload includes the booking ID, event type, start and end times, invitee name and email, status, and any custom fields. Zapier automatically parses the JSON so you can map fields to actions.

Not via webhooks. Those are one-way (Astrocal to Zapier). To create bookings from Zapier, use a 'Webhooks by Zapier' action step pointed at the Astrocal REST API. You'll need an API key.

Astrocal retries failed deliveries up to 6 times with exponential backoff, from 1 minute up to 24 hours. You can see every delivery attempt and status code in the webhook dashboard.

Astrocal's webhooks are on every Astrocal plan including Free. On Zapier's side, Webhooks by Zapier is a premium feature, so catching the webhook requires a paid Zapier plan (Professional and up). The number of Zaps and tasks then depends on your Zapier plan.

Yes. Create separate webhook endpoints in Astrocal, one per Zap, and subscribe each to the events you need. Or use a single webhook and add a Zapier filter step to route by event type.

Connect Astrocal to 8,000+ apps via Zapier

Webhooks on every plan. Free to start, no credit card required.

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Every booking,automated without code