Check appointment availability via authenticated webhook and Google Calendar
Ready for 3.0Ready for 3.0. This template uses no nodes that n8n 3.0 removes. No removed nodes, versions or helpers found. Static check, last run 2026-10-19.
What this workflow does
This workflow has 8 nodes and runs when an HTTP POST request hits its webhook URL. Along the way it connects Google Calendar.
How it runs
Trigger: When an HTTP POST request hits its webhook URL.
- Validate Request (Code): runs custom JavaScript code
- Request Is Valid (If): checks a condition and branches into true / false
- Check Calendar (Google Calendar): availability (calendar)
- Return Invalid (Respond to Webhook): sends the response back to the webhook caller
- Format Availability (Code): runs custom JavaScript code
- Return Provider Error (Respond to Webhook): sends the response back to the webhook caller
- Return Availability (Respond to Webhook): sends the response back to the webhook caller
Services it uses
Before you upgrade to n8n 3.0
Nothing in this workflow is removed in n8n 3.0, so it should import and run after the upgrade.
Nodes used (5)
- Webhook
n8n-nodes-base.webhook - Code
n8n-nodes-base.code - If
n8n-nodes-base.if - Google Calendar
n8n-nodes-base.googleCalendar - Respond to Webhook
n8n-nodes-base.respondToWebhook
From the author
Quick overview This workflow exposes an authenticated webhook that validates a proposed start/end time, checks Google Calendar availability for that interval, and returns a structured JSON response indicating whether the slot is available, busy, or could not…