Send WhatsApp Message

Send text, media, and template messages to any WhatsApp number with real-time delivery tracking and end-to-end encryption.

7 Message Types

Text, image, video, audio, document, interactive (buttons & lists), and template — all via a single endpoint

Global Reach

Deliver to any WhatsApp-enabled number worldwide with automatic E.164 number formatting

End-to-End Encryption

All WhatsApp messages are secured with end-to-end encryption by default

Instant Delivery

Real-time delivery with read receipts and status callbacks via webhooks

Authentication Required

Use Basic Auth with the precomputed Base64 token from your dashboard. Set it in the Authorization header as Basic <token>.

Avg Response Time

200ms

95th percentile

Cost per Message

₵0.05

1 credit = 1 message

Max Media Size

16MB

images, docs & video

Rate Limit

80/s

per API key

POST

/v1/whatsapp/send

Core

Stable

Request Body

application/json

JSON

{
  "to": "233244000000",
  "type": "text",
  "text": {
    "body": "Hello from Sendexa! Your order #ORD-12345 has been confirmed.",
    "preview_url": true
  }
}

Response

JSON

{
  "success": true,
  "message": "WhatsApp message sent successfully",
  "data": {
    "id": "wamid.HBgLMjMzNTU1MzM5NTIVAgARGBI2QzE5QUI3RjZENkI2QTU3NjQA",
    "messageId": "exa_wa_123456789_abc123def",
    "status": "sent",
    "to": "233244000000",
    "type": "text",
    "cost": 1,
    "timestamp": "2024-01-15T10:30:00Z"
  }
}

Try It Yourself

POST

https://api.sendexa.co/v1/whatsapp/send

Code Examples

Bash

curl -X POST 'https://api.sendexa.co/v1/whatsapp/send' \
  -H 'Content-Type: application/json' \
  -H 'Authorization: Basic YOUR_DASHBOARD_BASE64_TOKEN' \
  -d '{
    "to": "233244000000",
    "type": "text",
    "text": { "body": "Hello from Sendexa WhatsApp API!" }
  }'

Common Use Cases

Transactional

Order & Shipping Updates

Send real-time order confirmations and delivery notifications

Support

Customer Support

Respond to enquiries with rich media and documents

Marketing

Promotional Campaigns

Run opt-in campaigns with images and call-to-actions

Rate Limits

Burst limit for peak traffic

80 requests per second

Sustained rate limit

3000 requests per minute

Daily soft cap

100000 requests per day

HTTP Status Codes

Code	Status	Description
200	OK	Message sent successfully
400	Bad Request	Invalid phone number or missing parameters
401	Unauthorized	Invalid or missing API credentials
403	Forbidden	Phone number not registered or insufficient credits
429	Too Many Requests	Rate limit exceeded

Best Practices

Use template messages for the first outbound message to a user
Store the returned messageId for delivery status tracking
Respect the 24-hour conversation window — use templates to re-open
Ensure all media URLs are publicly accessible over HTTPS