Send WhatsApp Group Messages from PowerShell Script - Complete Guide

Automate WhatsApp Group Messaging with PowerShell

Looking to integrate WhatsApp group messaging into your Windows automation scripts? This guide walks you through sending WhatsApp group messages using PowerShell and the WhatsMate WA Gateway REST API. Perfect for Windows system administrators, DevOps engineers, or anyone using PowerShell for automation that needs WhatsApp group notifications.

📋 Prerequisites

Before you begin, ensure you have:

1. A WhatsMate WA Gateway Forever Green account - Required for group messaging API access
2. Group setup - Create a WhatsApp group with a unique name and add the gateway
3. PowerShell installed - Version 5.1 or higher (Windows PowerShell) or PowerShell Core
4. Windows system - Or any system with PowerShell support
5. Basic PowerShell knowledge - Familiarity with PowerShell scripting and cmdlets

⚠️ Important: You need a Forever Green account to send messages to WhatsApp groups. The gateway must be added to your WhatsApp group before it can send messages. Sign up for a Forever Green account to enable group messaging capabilities.

📝 Step-by-Step Implementation

Follow these steps to send your first WhatsApp group message from a PowerShell script:

1. Prepare Your WhatsApp Group

Before coding, set up your WhatsApp group:

1. Create a new group in WhatsApp with a unique name (the API won’t work if the name isn’t unique)
2. Add the secret gateway number to the group
3. Send a “Hi” message (or any message) in the group from your personal WhatsApp account - this helps the gateway silently recognize the new group in the background

2. Copy the PowerShell Template

Copy the following source code to your PowerShell script:

3. Configure Key Parameters

Customize these essential parameters in the PowerShell script:

• Line 1: Specify the group admin’s phone number (including country code, e.g., 12025550108)
• Line 2: Provide your group name (must be unique)
• Line 3: Enter your message content
• Line 5: Replace YOUR_INSTANCE_ID_HERE with your WhatsApp gateway instance ID
• Lines 6-7: Update YOUR_CLIENT_ID_HERE and YOUR_CLIENT_SECRET_HERE with your Forever Green Client ID and Secret

4. Run the Script

1. Save your PowerShell script (e.g., send-whatsapp-group.ps1)
2. Run the script to send your WhatsApp group message

🔧 Common Use Cases

This PowerShell integration is ideal for:

• Windows server monitoring - Send WhatsApp alerts for server issues, disk space, or service failures
• Active Directory automation - Notify IT teams about user account changes, group policy updates, or security events
• Scheduled task notifications - Get WhatsApp updates when scheduled PowerShell tasks complete or fail
• Infrastructure automation - Integrate WhatsApp messaging into Windows infrastructure management and deployment scripts

🚀 Get Started Today

Ready to integrate WhatsApp group messaging into your PowerShell scripts? You’ll need a Forever Green account to access the group messaging API. Sign up for a Forever Green account and start sending group messages within minutes!

Next Steps: Once you’ve mastered basic group text messaging, explore advanced features like sending images or documents to WhatsApp groups through the WhatsMate WA Gateway API documentation.