Cal.com events, straight into ntfy
Every new booking, cancellation, or reschedule — posted to ntfy the moment it happens. No ntfy app to install, no monthly automation subscription.
The gap this fills: Cal.com doesn't ship an official ntfy app. If you want new booking, cancellation, or reschedule to show up in ntfy the moment it happens, the usual options are a paid third-party bot, custom code, or routing everything through a $20–50/month automation platform just to move one webhook from one URL to another. ZestyGlue does exactly that one thing for $9/month.
What it looks like
ZestyGlue
Cal.com — Booking Created
A real Cal.com event, shown as ZestyGlue formats it for ntfy.
Setup — about two minutes
- Create the connector. In ZestyGlue, start a new Cal.com → ntfy connector. You'll get a unique webhook URL right away.
- Point Cal.com at it. Go to Settings → Developer → Webhooks → add a webhook, paste in your ZestyGlue webhook URL, and select the trigger events you want.
- (Optional) set a secret. Cal.com can sign its payloads if you set a secret on the webhook — enter the same value into ZestyGlue for extra verification, though it isn't required to get started.
- Point ntfy at ZestyGlue. Pick any topic name — e.g.
https://ntfy.sh/your-secret-topic — enter it into ZestyGlue, and subscribe to that same topic in the ntfy app or web client.
Tip: Cal.com lets you scope webhooks per event type — enable just BOOKING_CREATED if you only want new bookings, or add the others to track changes too.
Events you can forward
BOOKING_CREATED
BOOKING_CANCELLED
BOOKING_RESCHEDULED
Questions
Is my Cal.com Webhook Secret safe with ZestyGlue?
It's encrypted at rest with Fernet symmetric encryption before it ever touches disk, it's never logged, and it's never displayed again in the dashboard after you enter it — only a masked placeholder is shown.
Is this the same as Cal.com's built-in notifications?
No — Cal.com's own notifications are typically personal booking confirmations. This is a webhook-level feed you can route to a shared team channel in any of ZestyGlue's 8 destinations.
Does self-hosted Cal.com work the same way?
Yes, as long as your self-hosted instance can reach zestyglue.com over the internet to deliver the webhook.
Do I need to self-host ntfy?
No, the free public ntfy.sh server works fine for most people — just pick an unguessable topic name.
What happens if my ZestyGlue subscription lapses?
Events are silently dropped rather than causing errors on Cal.com's side — Cal.com never sees a failure response, so it won't retry aggressively or flag your webhook as broken. Your dashboard will simply stop showing new events until you resubscribe.