🔌 Developer API

SMS API Service in Coimbatore

Integrate SMS into your Coimbatore-based applications with our developer-friendly REST API. Support for PHP, Python, Node.js, Java & more.

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⚡ Simple REST API

Send SMS with a single HTTP POST request. JSON request/response format. Get started in under 5 minutes.

📦 Multi-Language SDKs

Ready-to-use code samples for PHP (cURL), Python (requests), Node.js (axios), Java, and C#.

🔐 OTP API

Dedicated OTP endpoint with auto-generate, verify, and expire functionality. Under 3-second delivery.

📊 Delivery Webhooks

Real-time delivery status callbacks. Track sent, delivered, failed, and read status for every message.

Quick Start — Send Your First SMS

curl -X POST https://api.onlinesmsservice.com/v1/send \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "to": "919876543210",
    "message": "Hello from Coimbatore! Your OTP is 123456",
    "sender": "OTPSMS",
    "type": "transactional"
  }'

See full documentation: API Integration Guide

SMS API FAQ

Can we use separate APIs for OTP and promotional traffic?

Yes. You can configure different sender IDs, templates, and route priorities based on use case and compliance requirements.

Do you provide integration help for existing CRM or ERP systems?

Yes. Integration support is available for custom apps as well as common CRM and ERP workflows.

Start Integrating SMS API Today

Free API key with 500 free SMS credits upon successful registration and DLT mapping with an approved telemarketer.

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