Send WhatsApp Messages from PowerShell Script - Complete Guide

Automate WhatsApp messaging using the WhatsMate WA Gateway REST API

Posted on February 19, 2016   Share on Facebook Share on LinkedIn Share on Twitter Share on Google+

Last reviewed: January 28, 2026  

Automate WhatsApp Messaging with PowerShell

Looking to automate WhatsApp notifications and messages from your Windows environment? This guide walks you through sending WhatsApp messages using PowerShell and the WhatsMate WA Gateway REST API. Perfect for Windows system administrators, IT professionals, and automation specialists managing Windows infrastructure.

📋 Prerequisites

Before you begin, ensure you have:

  1. A WhatsMate WA Gateway account - Required for API access
  2. Recipient registration - Each recipient must register with the Gateway first
  3. PowerShell - Version 5.1 or higher (Windows PowerShell or PowerShell Core)
  4. Basic PowerShell knowledge - Familiarity with running PowerShell scripts

⚠️ Important: Recipients must register with the WhatsMate WA Gateway before they can receive messages. Unregistered users will not receive any messages from the Gateway. Registration instructions are available on the official WhatsMate site.

🎥 Video Walkthrough

📝 Step-by-Step Implementation

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

1. Copy the PowerShell Template

Start by copying the following source code into a PowerShell script file named send-whatsapp.ps1:

2. Configure a few Parameters

Customize these key parameters in the PowerShell script:

  • Line 4: Replace with your gateway instance ID
  • Lines 5-6: Update with your Client ID and Secret
  • Line 1: Specify the target phone number (including the country code, e.g., 12025550108)
  • Line 2: Provide your message content

3. Send Your Message

Run the PowerShell script to deliver your WhatsApp message:

.\send-whatsapp.ps1

🔧 Common Use Cases

This PowerShell integration approach is ideal for:

  • Windows server monitoring - Send alerts when servers need attention
  • Active Directory automation - Notify about user account changes or security events
  • Scheduled tasks - Automate daily or weekly reports via WhatsApp
  • IT operations - Alert teams about system maintenance or outages

🚀 Get Started Today

Ready to automate WhatsApp messaging from your Windows environment? You’ll need a trial account to access the API. Sign up for a 2-week trial and start sending messages within minutes!

Next Steps: Once you’ve mastered basic message sending, explore advanced features like sending images, documents, or group messages through the WhatsMate API documentation.