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Voice SMS (Broadcast)

Deliver automated, high-fidelity text-to-speech alerts, transactional security verification, and bulk notification calls.

Lifelike Text-To-Speech

Leverage advanced standard neural synthesis to convert any textual script into high-clarity spoken audio.

Multilingual Dialects

Broadcast in over 30 languages with custom Male/Female accents (en-US, fr-FR, es-ES, de-DE, en-NG, etc.).

High-Volume Dispatch

Parallel carrier routing designed to dispatch hundreds of outbound notifications concurrently.

Average Latency

< 2.5s

To ring device

Outbound Min Rate

$0.015

Regional African routes

Dialect support

30+

Neural speaker accents

Spam protection

Active

Intelligent blocklist filter

POST
/v1/voice/calls
Voice SMS
GA Active

Payload Parameters

application/json
JSON
{
  "to": "+233241234567",
  "from": "SENDEXA",
  "message": "Hello! Your verification code is 8 2 0 4. Repeat, your verification code is 8 2 0 4.",
  "voice": "female",
  "language": "en",
  "callType": "OUTBOUND_OTP",
  "destinationType": "MOBILE"
}

Response Payloads

JSON
{
  "success": true,
  "message": "Call initiated successfully",
  "callId": "call-527a00f1-4dbf-473d-82d2-ca4ad47f9cb3",
  "data": {
    "callId": "call-527a00f1-4dbf-473d-82d2-ca4ad47f9cb3",
    "to": "+233241234567",
    "callType": "OUTBOUND_OTP",
    "provider": "dexatel",
    "destinationCountry": "Ghana",
    "ratePerMinute": 0.10,
    "estimatedCostUsd": 0.15
  }
}

API Code Integration Examples

Bash
curl -X POST 'https://api.sendexa.co/v1/voice/calls' \
  -H 'Content-Type: application/json' \
  -H 'Authorization: Bearer YOUR_DEVELOPER_API_KEY' \
  -d '{
    "to": "+233241234567",
    "from": "SENDEXA",
    "message": "Hello, this is a transactional voice call from Sendexa. Your OTP is 5 9 1 2.",
    "voice": "female",
    "language": "en"
  }'