Availly Booking Webhook → Slack & Email Alerts (n8n)

Get instant alerts when Availly bookings happen—secured and routed to Slack (and optionally email)

This n8n workflow receives Availly booking webhooks, verifies each request using Availly’s HMAC-SHA256 signature, and then sends a “New Availly booking” notification to Slack. If you want, it can also email the calendar owner with the booking details.

What this workflow does

• Receives a POST webhook from Availly while preserving the raw request body.
• Verifies authenticity: rebuilds the signed string from the x-availly-timestamp header and the raw body, computes an HMAC-SHA256 signature, and compares it to x-availly-signature.
• Blocks invalid requests: if the signature doesn’t match, the workflow stops with an error.
• Ignores heartbeat events: if event equals ping, it does nothing.
• Sends Slack alerts via an incoming webhook with a formatted “New Availly booking” message.
• Optionally emails booking details (visitor, time, status, and note) to the owner.

Use cases

• You run a booking calendar on Availly and want real-time Slack notifications for new bookings.
• You manage multiple team calendars and need reliable, signature-validated alerts before anyone reacts to the event.
• You want a lightweight backup channel: Slack + Email so booking details are captured even if Slack notifications are missed.

Technical details

• Webhook node to receive Availly POST requests and preserve raw body.
• Crypto node using HMAC-SHA256 with your Availly signing secret.
• If and Set for event handling (including skipping ping).
• Slack via Slack Incoming Webhook (HTTP request node).
• Email Send node (optional) with an SMTP credential for alerts to the owner.
• Includes a Sticky Note to guide setup.

Setup is straightforward: copy the Webhook Production URL into Availly, add your signing secret, configure the Slack Incoming Webhook URL, and enable Email Send if you want email alerts.