We’re excited to introduce a new and expanded WhatsApp API Developer section on the APEX Messaging website.

As WhatsApp continues to become a critical channel for customer communication, we’ve seen a growing need for clear, practical documentation that covers not just endpoints and parameters, but also the fundamental principles behind how WhatsApp messaging actually works.

This new section is designed to be a living reference for developers, product teams, and technical partners integrating WhatsApp via the APEX Messaging platform.

What’s New in the WhatsApp API Section

The updated developer hub now provides a more complete overview of the WhatsApp Business Platform, including:

• How to register and verify a WhatsApp Business Account via Meta Business Suite
• Phone number requirements and common onboarding pitfalls
• Message template approval & categories
• User opt-in and compliance requirements
• Media support and file format limitations
• Delivery reports and webhook integration

Rather than focusing purely on API syntax, the goal is to help teams understand how WhatsApp expects businesses to send messages, reducing failed requests, rejected templates, and onboarding delays.

Covering the Basics: How WhatsApp Messaging Works

WhatsApp Business messaging follows a few core principles that differ from traditional SMS or email:

• Business-initiated messages require approved templates
  Any message sent outside an active user conversation must use a pre-approved template.
• Templates are categorised by intent
  Authentication, Utility, and Marketing templates each have different rules and relative costs, based on their purpose.
• User consent is mandatory
  End users must explicitly opt in to receive WhatsApp messages, and businesses must clearly communicate what they are signing up for.
• Phone numbers are tightly controlled
  A WhatsApp API number can only be used for one account and cannot be shared with mobile WhatsApp apps at the same time.
• Media and formatting are strictly enforced
  Unsupported file types, oversized media, or mismatched template content will result in message rejection.

By documenting these fundamentals alongside the API itself, we aim to make integrations faster, smoother, and more reliable.

Built to Grow With You

This WhatsApp API section is not a static document.

Over the coming weeks, we’ll continue expanding it with:

• More examples and edge cases
• Additional API methods and responses
• Deeper guidance around delivery reports and error handling
• Improvements based on customer and partner feedback

Our aim is to turn this developer hub into a practical reference point for both new integrations and long-term production use.

If you have any questions, please visit our contact page to get in touch!