Everything you need to build on WhatsApp
A complete API for messaging, groups, webhooks, and anti-ban features. Built for developers who ship fast.
Messaging
Text Messages
Send and receive plain text messages with full Unicode support
Media Sharing
Send images, videos, audio files, and documents up to 100MB
Message History
Encrypted storage with configurable retention (7, 14, or 30 days)
Read Receipts
Track message delivery status and read confirmations
Groups
Group Management
Create, update, and manage WhatsApp groups programmatically
Member Operations
Add, remove, promote, and demote group members via API
Group Metadata
Fetch group info, participant lists, and settings
Broadcast Lists
Send messages to multiple recipients efficiently
Contacts
Contact Sync
Automatically sync WhatsApp contacts to your account
Profile Lookup
Retrieve contact profile pictures and status messages
Presence Detection
Check if contacts are online or typing
Block/Unblock
Manage blocked contacts programmatically
Webhooks
Real-time Events
Receive instant notifications for new messages and status updates
Custom Endpoints
Configure multiple webhook URLs for different event types
Retry Logic
Automatic retries with exponential backoff on failures
Event Filtering
Subscribe only to the events you need
Anti-Ban Features
Automatic Warming
Gradually increase activity over 15-20 days to avoid spam detection
Response Rate Monitor
Track reply rates and get alerts when ban risk increases
Rate Limiting
Stay within safe sending limits (2000 messages/day for paid tier)
Session Persistence
Maintain connections without frequent re-authentication
Built for real use cases
See how developers use WAZEN in production
Customer Support
Automate responses, handle inquiries, and provide 24/7 support via WhatsApp
// Auto-reply to customer inquiries
webhook.on('message', async (msg) => {
if (msg.text.toLowerCase().includes('hours')) {
await sendMessage(msg.from, {
text: 'We're open Mon-Fri, 9am-6pm EST'
});
}
});Notifications
Send order updates, appointment reminders, and transactional alerts
// Send order confirmation
await sendMessage(customer.phone, {
text: `Order #${orderId} confirmed!
Expected delivery: ${deliveryDate}`
});Marketing Campaigns
Reach customers with personalized promotions and broadcasts
// Send promotional message
for (const contact of targetList) {
await sendMessage(contact.phone, {
text: `Hi ${contact.name},
Special 20% off for you this week!`
});
await sleep(5000); // Delay between sends
}Ready to dive deeper?
Explore our complete API documentation with endpoints, parameters, and response examples.