# BLACKSMS

> Bulk SMS, OTP, and WhatsApp OTP API for businesses in India. REST API with code examples for PHP, Python, Java, and Node.js. DLT registered, TRAI compliant.

BLACKSMS is a bulk SMS service provider based in Mumbai, India, founded in 2023. It provides promotional SMS, transactional SMS, OTP verification, and WhatsApp OTP delivery, accessible via a REST API.

## Pricing

- Regular bulk SMS: starts at ₹0.30/SMS (₹100–₹3,999 recharge), down to ₹0.16/SMS at ₹600,000+ recharge
- WhatsApp SMS: starts at ₹0.30/message, down to ₹0.04/message at ₹600,000+ recharge
- Full pricing table: https://www.blacksms.in/index#pricing

## API

- [Full API Specification (LLM)](https://blacksms.in/llms-full.txt): Complete REST API parameters, payload examples, DLT rules, and SDK snippets in cURL, PHP, Python, and Node.js.
- [API Documentation Page](https://www.blacksms.in/docs): Interactive Web API documentation and portal guides.
- [Code Examples](https://www.blacksms.in/docs#example-requests): Sample integrations in PHP, Python, Java, Node.js
- Example request:
  ```
  curl -X POST https://blacksms.in/sms \
    -H "Authorization: Your-API-Key" \
    -H "Content-Type: application/json" \
    -d '{"sender_id": "Sender id", "variables_values": "123456", "numbers": "9876543210", "route": 1}'
  ```

## Services

- Bulk SMS — promotional and transactional messaging to large recipient lists
- OTP SMS — one-time password delivery for authentication
- WhatsApp OTP — OTP delivery via WhatsApp Business API

## Company

- [About](https://www.blacksms.in/about)
- [Contact](https://www.blacksms.in/contact)
- Telegram: https://t.me/blacksmsindia
- Instagram: https://www.instagram.com/blacksmsindia
- Phone: +44 7882972645

## Optional

- [Blog](https://www.blacksms.in/blog)
- [Tutorials](https://www.blacksms.in/tutorials)
- [Knowledge Base](https://www.blacksms.in/knowledge-base)
- [Terms & Conditions](https://www.blacksms.in/terms)
- [Privacy Policy](https://www.blacksms.in/privacy)
- [Refund Policy](https://www.blacksms.in/refund)