Send an email in Postmark when someone books a meeting in Calendly

What each client fills in

Postmark: From

For example Northside Plumbing <hello@northside.example>

The accounts it needs

Each is the client’s own, stored encrypted and never copied between clients. Until one is added the client’s checklist shows it, and nothing runs.

• Calendly

  In the client’s Calendly: Integrations & apps → API and webhooks → Personal access tokens → Generate new token, with the scopes scheduling_links:write (booking links) and, for the triggers, users:read, webhooks:read and webhooks:write. A token made before Calendly introduced scopes keeps full access.

• 

  Postmark → the client’s server → API Tokens → copy the Server API token. The From address must be a confirmed sender signature or on a verified domain.

After you install it

It lands switched off. The client’s checklist holds exactly this:

1. Connect the client’s Calendly, for “Someone books a meeting”
2. Connect the client’s Postmark, for “Send an email”
3. Fill in Postmark: From (For example Northside Plumbing <hello@northside.example>)
4. Confirm with the client: The client’s Calendly is on a paid plan (Standard, Teams or Enterprise): Calendly sends webhook events only on those.