Send SMS

Send a single SMS message with comprehensive delivery tracking, automatic number formatting, and real-time status updates.

Quick Start Video (2 mins)

How to send your first SMS with Sendexa API

2:15

International Format Support

Automatically converts local Ghanaian numbers (055xxxxxxx) to international format (23355xxxxxxx)

Smart Segmentation

Messages >160 characters are automatically split into multiple segments (max 1530 chars)

Sender ID Verification

Only pre-approved sender IDs can be used. Pending IDs will be automatically rejected.

Delivery Tracking

Real-time delivery status with provider-level feedback and error codes

Authentication Required

Use Basic Auth with your API credentials. Encode your API Key and Secret in base64 format: base64(api_key:api_secret)

Avg Response Time

150ms

95th percentile

Cost per SMS

₵0.035

1 credit = 1 SMS

Max Message Length

1530

characters (10 segments)

Rate Limit

100/s

per API key

POST

/v1/sms/send

Core

Stable

Request Body

application/json

{
  "to": "0555539152",
  "from": "YourBrand",
  "message": "Hello from Sendexa!"
}

Response

{
  "success": true,
  "message": "SMS sent successfully",
  "data": {
    "id": "clxyz123abc",
    "messageId": "exa_api_123456789_abc123def",
    "status": "delivered",
    "cost": 1,
    "to": "233555539152",
    "from": "YourBrand",
    "segments": 1,
    "timestamp": "2024-01-15T10:30:00Z",
    "estimatedDelivery": "2024-01-15T10:30:05Z"
  }
}

Try It Yourself

POST

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

Code Examples

curl -X POST 'https://api.sendexa.co/v1/sms/send' \
  -H 'Content-Type: application/json' \
  -H 'Authorization: Basic YOUR_BASE64_CREDENTIALS' \
  -d '{
    "to": "0555539152",
    "from": "YourBrand",
    "message": "Hello from Sendexa SMS API!"
  }'

Common Use Cases

OTP

Two-Factor Authentication

Send verification codes with 5-minute expiry

Marketing

Promotional Messages

Schedule campaigns with personalized content

Transactional

Order Confirmations

Real-time updates with delivery tracking

Rate Limits

Burst limit for peak traffic

100 requests per second

Sustained rate limit

5000 requests per minute

Daily soft limit

100000 requests per day

HTTP Status Codes

Code	Status	Description
200	OK	SMS sent successfully
400	Bad Request	Invalid phone number or missing parameters
401	Unauthorized	Invalid or missing API credentials
403	Forbidden	Sender ID not approved or insufficient credits
429	Too Many Requests	Rate limit exceeded (100 requests/second)

Best Practices

Always validate phone numbers client-side before sending
Store messageId for future status checks and resends
Implement exponential backoff for retries on 429 responses
Use webhooks instead of polling for delivery status updates