Templates / Automate appointment phone reminders with Google Calendar and Retell AI

Automate appointment phone reminders with Google Calendar and Retell AI

Ready for 3.0

by Nabin Bhandari ✓ · 2,442 views · created 2025-08-18 · AI Chatbot, Multimodal AI

Ready 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 5 nodes and runs on a schedule (every day at 09:00). Along the way it connects Google Calendar. It also calls api.retellai.com over HTTP.

How it runs

Trigger: On a schedule (every day at 09:00).

Get Upcoming Events (Google Calendar): get many
Extract Appointment Details (Code): runs custom JavaScript code
Set Config (Retell Setup) (Edit Fields (Set)): sets or maps fields
Send Reminder Call ( Retell Api) (HTTP Request): calls api.retellai.com

Services it uses

Google Calendar

HTTP calls to: api.retellai.com

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)

Edit Fields (Set)n8n-nodes-base.set
Schedule Triggern8n-nodes-base.scheduleTrigger
HTTP Requestn8n-nodes-base.httpRequest
Google Calendarn8n-nodes-base.googleCalendar
Coden8n-nodes-base.code

From the author

Appointment Reminder Agent automates phone call reminders for upcoming appointments by seamlessly connecting Google Calendar with Retell AI. This powerful workflow is designed to help businesses, clinics, and service providers ensure clients never miss their…
Excerpt from Nabin Bhandari's description on n8n.io.

View the original on n8n.io → Check your own copy

Automate appointment phone reminders with Google Calendar and Retell AI

What this workflow does

How it runs

Services it uses

Before you upgrade to n8n 3.0

Nodes used (5)

From the author

Get the weekly “what broke” email