How to Send WhatsApp Messages from Your App in 5 Minutes

If you've ever tried integrating WhatsApp into your app, you know the pain. Meta's official API requires business verification, approval processes, and per-message fees that don't make sense for small projects. There's a simpler way. In this tutorial, I'll show you how to send your first WhatsApp message programmatically in under 5 minutes using a REST API. Step 1: Get Your API Key Sign up at wazen.dev and grab your API key from the dashboard. Takes about 30 seconds. Step 2: Connect Your WhatsApp Scan the QR code shown in the dashboard with your WhatsApp app just like connecting WhatsApp Web. Your session is now live. Step 3: Send a Message One API call. That's it: curl -X POST https://wazen.dev/api/v1/sessions/{session_id}/messages \ -H "Authorization: Bearer wz_your_api_key" \ -H "Content-Type: application/json" \ -d '{ "to": "1234567890", "type": "text", "content": "Hello from my app!" }' Response: { "id": "msg_abc123", "sessionId": "sess_xyz", "to": "1234567890", "type": "text", "c