Why use an SMS API?
An SMS API allows your application to send and receive SMS messages programmatically — triggering messages based on user actions, database events or scheduled jobs. Common use cases include OTP authentication, order notifications, appointment reminders and two-factor authentication.
SMSMessenger API overview
SMSMessenger provides a free RESTful SMS API with JSON responses. The API supports sending single and bulk SMS messages, checking delivery status, managing contacts and receiving inbound messages via webhook. A sandbox environment is available for testing without consuming credits.
Authentication
The SMSMessenger API uses API key authentication. Generate your API key from your account dashboard and include it in every request as a header or query parameter.
Sending your first SMS via API
A basic SMS send request requires three parameters: your API key, the recipient mobile number (in international format: 27821234567) and the message text. The API returns a JSON response with a message ID and delivery status.
Supported languages
SMSMessenger’s API works with any language that can make HTTP requests — PHP, Python, Node.js, Java, C#, Ruby, Go and more. Code examples are available in the full API documentation.
Webhooks for delivery reports
Configure a webhook URL in your account settings to receive real-time delivery report notifications whenever the status of a sent message changes. This allows your application to update its own records automatically.
