Book and manage appointments with Google Calendar and Gmail

Overview This workflow automates the complete appointment booking process, from request validation to scheduling, notifications, and reminders.

It checks calendar availability in real time, prevents double bookings, suggests alternative slots when unavailable, and automatically sends confirmations and reminders—ensuring a smooth and reliable booking experience.

Perfect for service-based businesses, consultants, and teams managing appointments at scale.

How It Works

Webhook Trigger Receives booking requests (name, email, date, time, notes).

Workflow Configuration Defines: Google Calendar ID Appointment duration Business hours Sender email

Data Validation Parses and validates input fields Ensures required data is present and correctly formatted

Calendar Availability Check Fetches existing events from Google Calendar Compares requested time with existing bookings

Conflict Detection Detects overlapping events Determines whether the slot is available

Decision Logic If available → proceed with booking
If not available → trigger alternative flow

Booking Flow (Available Slot)

Create Calendar Event Schedules appointment in Google Calendar Adds attendee and event details

Confirmation Email Sends booking confirmation with event details Includes calendar event link

Webhook Response Returns success response to client/system

Reminder System Schedules automated reminders: 24-hour reminder before appointment 1-hour reminder before appointment Uses wait nodes to trigger emails at exact times Includes appointment details to reduce no-shows

Alternative Flow (Unavailable Slot)

Generate Alternative Slots Finds next available time slots within business hours Ensures slots are within a defined time window

Alternative Email Notification Sends suggested time slots to the user

Webhook Response Returns unavailable status with alternatives

Setup Instructions

Webhook Setup Configure endpoint (booking) Connect to your frontend or booking form

Google Calendar Add Google Calendar credentials Set calendar ID

Gmail Integration Add Gmail credentials for: Confirmation emails Reminder emails Alternative slot notifications

Configure Parameters Set: Appointment duration (e.g., 60 minutes) Business hours (e.g., 9–17) Sender email

Customize Messages Edit email templates for: Confirmation Alternatives Reminders

Use Cases

Appointment booking systems for businesses
Coaching and consulting session scheduling
Service-based business automation (salons, clinics, etc.)
Internal team scheduling tools
Calendly-style booking workflows

Requirements

Google Calendar account
Gmail account
n8n instance (cloud or self-hosted)

Key Features

Real-time availability checking
Automatic conflict detection
Calendar event creation
Alternative slot suggestions
Email notifications and confirmations
Automated reminder system (24h + 1h)
Fully customizable booking logic

Summary

A complete appointment scheduling system that automates booking validation, calendar management, notifications, and reminders. It reduces manual coordination, prevents scheduling conflicts, and improves attendance with automated follow-ups.