Test Calendly Webhooks with HookTest
Test Calendly webhooks for booking, cancellation, and rescheduling events. Use HookTest to create a free webhook URL, point Calendly at it, and inspect every request in real time — headers, body, and signature included.
Quick Start
Get Calendly webhooks flowing to HookTest in under a minute:
- Create a HookTest URL. Go to hooktest.dev and click Create Bin. Copy the webhook URL.
- Add it to Calendly webhook settings. Paste the HookTest URL as your webhook endpoint in the Calendly developer dashboard. Select the events you want to receive.
- Trigger an event and inspect. Perform an action in Calendly (or use their test/sandbox mode) and watch the request appear in HookTest in real time. Check headers, body, and query parameters.
Common Calendly Webhook Events
These are the most commonly tested Calendly webhook events. Each one triggers an HTTP POST to your webhook URL with a JSON payload.
| Event | Description |
|---|---|
invitee.created | A new booking is made |
invitee.canceled | A booking is canceled |
routing_form_submission.created | A routing form is submitted |
Verifying Calendly Signatures
Calendly signs every webhook request using the Calendly-Webhook-Signature header. You should always verify this signature in production to confirm the request actually came from Calendly and was not tampered with in transit.
When testing with HookTest, you can inspect the raw signature header value in the request details. This is useful for verifying that your signature verification code handles the header format correctly before deploying to production.
See the official Calendly webhook docs for the full signature verification algorithm and code samples.
Why Test Calendly Webhooks?
Webhook handlers are notoriously hard to debug. You cannot see what Calendly is sending until your endpoint receives it, and errors in your handler can cause silent failures — missed payments, lost data, or broken integrations.
HookTest gives you full visibility into every request before you write a line of handler code. Create a bin, point Calendly at it, and see exactly what arrives: HTTP method, headers (including signatures), body, and query parameters. Once your handler is ready, use webhook forwarding to send requests to your local server in real time.
Start testing Calendly webhooks
Create a free webhook URL in one click. No signup required.
Create Free Webhook URL