Send WhatsApp appointment reminders from Google Calendar with MoltFlow

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1. Workflow Overview

What this template does Automatically sends WhatsApp reminders for upcoming appointments from your Google Calendar using MoltFlow (https://molt.waiflow.app). Perfect for clinics, salons, consultant...

Best for

Ticket Management automation workflows
intermediate n8n builders looking for reusable templates

Tools used

n8n-nodes-base.stickynote, n8n-nodes-base.scheduletrigger, n8n-nodes-base.googlecalendar, n8n-nodes-base.code, n8n-nodes-base.if, n8n-nodes-base.httprequest

Source and attribution

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

Original n8n.io source

1.1 Workflow description

Title: Send WhatsApp appointment reminders from Google Calendar with MoltFlow
Workflow name: Send WhatsApp appointment reminders from Google Calendar with MoltFlow

What this template does

Automatically sends WhatsApp reminders for upcoming appointments from your Google Calendar using MoltFlow (https://molt.waiflow.app). Perfect for clinics, salons, consultants, and any appointment-based business.

How it works

Runs every hour and checks your Google Calendar for the next 24 hours
Finds appointments with client phone numbers in the event description
Extracts client name and appointment details
Sends a personalized WhatsApp reminder asking for confirmation
Logs the results for tracking

Set up steps

Create a MoltFlow account (https://molt.waiflow.app) and connect your WhatsApp number
Generate an API key in MoltFlow (Sessions page, API Keys tab)
Connect your Google Calendar OAuth2 credential
Set your calendar ID (default: primary)
Set YOUR_SESSION_ID in the Format Reminders code node
Add your MoltFlow API key as an HTTP Header Auth credential (Header Name: X-API-Key)
Add client phone numbers to calendar event descriptions in the format: Phone: 1234567890

Prerequisites

MoltFlow account with an active WhatsApp session
Google Calendar with client phone numbers in event descriptions
Format: add "Phone: 1234567890" to the event description field

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 - Sticky Note

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

Block 2 - Sticky Note1

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

Block 3 - Every Hour

Type / Role: n8n-nodes-base.scheduleTrigger - scheduleTrigger
Config choices: Version 1.2

Block 4 - Get Upcoming Events

Type / Role: n8n-nodes-base.googleCalendar - googleCalendar
Config choices: Version 1.2

Block 5 - Format Reminders

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

Block 6 - Has Reminder?

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

Block 7 - Send WhatsApp Reminder

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 8 - Log Results

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

3. Summary Table

Workflow	Send WhatsApp appointment reminders from Google Calendar with MoltFlow
Complexity	intermediate
Nodes	8
Categories	Ticket Management
Author	Alex Pekler
Published	18 Feb 2026

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/13482/13482.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 Ticket Management workflows

Frequently asked questions

What does Send WhatsApp appointment reminders from Google Calendar with MoltFlow 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 Ticket Management use case.

Alex Pekler

9 workflows

Nodes

n8n-nodes-base.stickynote n8n-nodes-base.scheduletrigger n8n-nodes-base.googlecalendar n8n-nodes-base.code n8n-nodes-base.if n8n-nodes-base.httprequest

Complexity

intermediate

Published 18 Feb 2026

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/13482/13482.json

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Send WhatsApp appointment reminders from Google Calendar with MoltFlow

Workflow preview

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

What this template does

How it works

Set up steps

Prerequisites

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Sticky Note

Block 2 - Sticky Note1

Block 3 - Every Hour

Block 4 - Get Upcoming Events

Block 5 - Format Reminders

Block 6 - Has Reminder?

Block 7 - Send WhatsApp Reminder

Block 8 - Log Results

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