WhatsApp API Documentation

3
A
Admin

WhatsApp API

API documentation for external application integration
Base URL
API
Replace localhost with your public SaaS domain when deployed.
Authentication

All API requests require the client's API key. 

Authorization: Bearer YOUR_API_KEY
Never share the API key publicly.
POST Send Message
/send-message
Request 
{
    "to": "919351321723",
    "message": "Hello from my application"
}
Response 
{
    "success": true,
    "messageId": "wamid..."
}
POST Send Document
/send-document
Request 
{
    "to": "919351321723",
    "documentUrl": "https://example.com/report.pdf",
    "fileName": "report.pdf",
    "caption": "Your report"
}
Response 
{
    "success": true,
    "message": "Document sent successfully."
}
POST Send Template
/send-template
Request 
{
    "to": "919351321723",
    "templateName": "appointment_reminder",
    "languageCode": "en",
    "parameters": [
        "Atul",
        "15 August 2026",
        "10:30 AM"
    ]
}
Response 
{
    "success": true,
    "message": "Template sent successfully."
}