Book, manage, and check appointments using Vapi and Google Calendar

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1. Workflow Overview

Use this workflow to book, cancel, or reschedule appointments using Vapi and Google Calendar How it works The Check Availability workflow checks if appointments exist on Google Calendar and returns...

Best for

Support Chatbot automation workflows
AI Chatbot automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.webhook, n8n-nodes-base.set, n8n-nodes-base.if, n8n-nodes-base.respondtowebhook, n8n-nodes-base.googlecalendar, n8n-nodes-base.code, n8n-nodes-base.stickynote, n8n-nodes-base.switch

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Johnpaul Nwagwu.

Original n8n.io source

1.1 Workflow description

Title: Book, manage, and check appointments using Vapi and Google Calendar
Workflow name: Book, manage, and check appointments using Vapi and Google Calendar

Use this workflow to book, cancel, or reschedule appointments using Vapi and Google Calendar

How it works

The Check Availability workflow checks if appointments exist on Google Calendar and returns a response to Vapi.

The Book Appointment workflow schedules an appointment on Google Calendar.

The Manage Appointments workflow updates or cancels appointments based on the user’s request.

Key Features:

Ability to book, update, or cancel an appointment
Validates required fields before booking
Handles errors with helpful user messages
Returns a Vapi-compatible response format

Set up steps

Prerequisites

Vapi.ai account
Google Calendar
n8n instance - Self-hosted or cloud

Steps

Step 1: Configure Google Calendar Access
Step 2: Import and Configure Workflows
Step 3: Create Vapi Custom Tools
Step 4: Configure Vapi Assistant

Use Cases

Appointment booking automation for service businesses

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - Book Appointment Webhook

Type / Role: n8n-nodes-base.webhook - webhook
Config choices: Version 2.1

Block 2 - Extract Booking Data

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Block 3 - Validate Required Fields

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.3

Block 4 - Respond - Validation Error

Type / Role: n8n-nodes-base.respondToWebhook - respondToWebhook
Config choices: Version 1.5

Block 5 - Create Calendar Event

Type / Role: n8n-nodes-base.googleCalendar - googleCalendar
Config choices: Version 1.3

Block 6 - Respond - Booking Success

Type / Role: n8n-nodes-base.respondToWebhook - respondToWebhook
Config choices: Version 1.5

Block 7 - Format Booking Success Response

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 8 - Format Validation Error Response

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 9 - Sticky Note

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 10 - Get Calendar Events for Date

Type / Role: n8n-nodes-base.googleCalendar - googleCalendar
Config choices: Version 1.3

Block 11 - Check Availability Webhook

Type / Role: n8n-nodes-base.webhook - webhook
Config choices: Version 2.1

Block 12 - Extract Availability Request

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Block 13 - Check Time Slot Availability

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.3

Block 14 - Respond - Time Available

Type / Role: n8n-nodes-base.respondToWebhook - respondToWebhook
Config choices: Version 1.5

Block 15 - Respond - Time Unavailable

Type / Role: n8n-nodes-base.respondToWebhook - respondToWebhook
Config choices: Version 1.5

Block 16 - Format Unavailable Time Response

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 17 - Format Available Time Response

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 18 - Sticky Note1

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 19 - Route by Action Type

Type / Role: n8n-nodes-base.switch - switch
Config choices: Version 3.4

Block 20 - Update Calendar Event

Type / Role: n8n-nodes-base.googleCalendar - googleCalendar
Config choices: Version 1.3

Block 21 - Find Appointment to Cancel

Type / Role: n8n-nodes-base.googleCalendar - googleCalendar
Config choices: Version 1.3

Block 22 - Delete Calendar Event

Type / Role: n8n-nodes-base.googleCalendar - googleCalendar
Config choices: Version 1.3

Block 23 - Manage Appointment Webhook

Type / Role: n8n-nodes-base.webhook - webhook
Config choices: Version 2.1

Block 24 - Extract Appointment Management Data

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Showing the first 24 of 35 workflow blocks. Download the JSON for the full node graph.

3. Summary Table

Workflow	Book, manage, and check appointments using Vapi and Google Calendar
Complexity	advanced
Nodes	35
Categories	Support Chatbot, AI Chatbot
Author	Johnpaul Nwagwu
Published	19 Jan 2026

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/12831/12831.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Support Chatbot workflows AI Chatbot workflows

Frequently asked questions

What does Book, manage, and check appointments using Vapi and Google Calendar do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Support Chatbot, AI Chatbot use case.

Johnpaul Nwagwu

2 workflows

Nodes

n8n-nodes-base.webhook n8n-nodes-base.set n8n-nodes-base.if n8n-nodes-base.respondtowebhook n8n-nodes-base.googlecalendar n8n-nodes-base.code n8n-nodes-base.stickynote n8n-nodes-base.switch

Complexity

advanced

Published 19 Jan 2026

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/12831/12831.json

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Book, manage, and check appointments using Vapi and Google Calendar

Workflow preview

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

How it works

Key Features:

Set up steps

Prerequisites

Steps

Use Cases

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Book Appointment Webhook

Block 2 - Extract Booking Data

Block 3 - Validate Required Fields

Block 4 - Respond - Validation Error

Block 5 - Create Calendar Event

Block 6 - Respond - Booking Success

Block 7 - Format Booking Success Response

Block 8 - Format Validation Error Response

Block 9 - Sticky Note

Block 10 - Get Calendar Events for Date

Block 11 - Check Availability Webhook

Block 12 - Extract Availability Request

Block 13 - Check Time Slot Availability

Block 14 - Respond - Time Available

Block 15 - Respond - Time Unavailable

Block 16 - Format Unavailable Time Response

Block 17 - Format Available Time Response

Block 18 - Sticky Note1

Block 19 - Route by Action Type

Block 20 - Update Calendar Event

Block 21 - Find Appointment to Cancel

Block 22 - Delete Calendar Event

Block 23 - Manage Appointment Webhook

Block 24 - Extract Appointment Management Data

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions