Send WhatsApp notifications for Cal.com & Calendly bookings using Google Gemini

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Important notice

This workflow is provided as-is. Please review and test before using in production.

1. Workflow Overview

Who's it for Business owners, freelancers, and professionals who use Cal.com or Calendly for scheduling and want instant WhatsApp notifications for all booking activities without constantly checkin...

Best for

Personal Productivity automation workflows
Multimodal AI automation workflows
intermediate n8n builders looking for reusable templates

Tools used

@n8n/n8n-nodes-langchain.lmchatgooglegemini, @n8n/n8n-nodes-langchain.memorybufferwindow, n8n-nodes-base.caltrigger, n8n-nodes-base.calendlytrigger, n8n-nodes-base.aggregate, @n8n/n8n-nodes-langchain.agent, n8n-nodes-base.whatsapp, n8n-nodes-base.stickynote

Source and attribution

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

Original n8n.io source

1.1 Workflow description

Title: Send WhatsApp notifications for Cal.com & Calendly bookings using Google Gemini
Workflow name: Send WhatsApp notifications for Cal.com & Calendly bookings using Google Gemini

Who's it for

Business owners, freelancers, and professionals who use Cal.com or Calendly for scheduling and want instant WhatsApp notifications for all booking activities without constantly checking their email or calendar apps.

What it does

This workflow automatically monitors your calendar booking events from both Cal.com and Calendly, then sends beautifully formatted WhatsApp messages to notify you of:

New bookings with guest details
Rescheduled meetings with old vs new times
Cancelled appointments
Meeting completion notifications (Cal.com only)

The AI agent intelligently formats each message with emojis, proper spacing, and all relevant booking information including guest names, emails, dates, times, locations, and notes.

How it saves you time

Stop checking multiple platforms: Instead of constantly monitoring email notifications, calendar apps, and booking dashboards, get everything instantly on WhatsApp - the app you're already using throughout the day.

Immediate awareness: Know about booking changes the moment they happen, not hours later when you finally check your email. This means you can quickly adjust your schedule, prepare for meetings, or reach out to clients if needed.

Mobile-first notifications: Since most people check WhatsApp more frequently than email, you'll never miss important booking updates again. Perfect for busy professionals who are often away from their desk.

How it works

When a booking event occurs on either platform, the workflow captures the data, merges it through an aggregator, then uses Google Gemini AI to generate a professionally formatted WhatsApp message that gets sent instantly to your phone.

Requirements

Cal.com and/or Calendly account with API access
WhatsApp Business API credentials
Google API key for Gemini
Active webhook endpoints for both calendar services

How to customize

Update the recipient phone number in the WhatsApp node
Modify message templates in the AI Agent's system prompt
Add additional calendar platforms by connecting more trigger nodes
Customize emoji usage and message formatting to match your brand

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 - Google Gemini Chat Model

Type / Role: @n8n/n8n-nodes-langchain.lmChatGoogleGemini - lmChatGoogleGemini
Config choices: Version 1

Block 2 - Simple Memory

Type / Role: @n8n/n8n-nodes-langchain.memoryBufferWindow - memoryBufferWindow
Config choices: Version 1.3

Block 3 - Cal.com Events

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

Block 4 - Calendly Events

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

Block 5 - Merge Data

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

Block 6 - Message Generator

Type / Role: @n8n/n8n-nodes-langchain.agent - agent
Config choices: Version 2.2

Block 7 - WhatsApp Notification

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

Block 8 - Sticky Note

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

3. Summary Table

Workflow	Send WhatsApp notifications for Cal.com & Calendly bookings using Google Gemini
Complexity	intermediate
Nodes	8
Categories	Personal Productivity, Multimodal AI
Author	Roshan Ramani
Published	14 Aug 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/7375/7375.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 Personal Productivity workflows Multimodal AI workflows

Frequently asked questions

What does Send WhatsApp notifications for Cal.com & Calendly bookings using Google Gemini 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 Personal Productivity, Multimodal AI use case.

Roshan Ramani

27 workflows

Nodes

@n8n/n8n-nodes-langchain.lmchatgooglegemini @n8n/n8n-nodes-langchain.memorybufferwindow n8n-nodes-base.caltrigger n8n-nodes-base.calendlytrigger n8n-nodes-base.aggregate @n8n/n8n-nodes-langchain.agent n8n-nodes-base.whatsapp n8n-nodes-base.stickynote

Complexity

intermediate

Published 14 Aug 2025

Likes 0

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Install path: /data/workflows/7375/7375.json

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Send WhatsApp notifications for Cal.com & Calendly bookings using Google Gemini

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

Who's it for

What it does

How it saves you time

How it works

Requirements

How to customize

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Google Gemini Chat Model

Block 2 - Simple Memory

Block 3 - Cal.com Events

Block 4 - Calendly Events

Block 5 - Merge Data

Block 6 - Message Generator

Block 7 - WhatsApp Notification

Block 8 - Sticky Note

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