Rajdoot is a self-hosted, low-cost SMS gateway powered by IoT technology. It enables developers and businesses to send and verify OTPs and SMS messages via a custom Node.js backend, React frontend, and MQTT-connected ESP8266 devices controlling GSM modules like SIM900A.

Unlike traditional providers like Twilio or Telesign, Rajdoot gives you full control, customizable workflows, and drastically lower SMS costs by leveraging open-source hardware and software.

✅ OTP & SMS APIs
✅ MQTT-based IoT communication
✅ SIM900A + ESP8266 + Arduino integration
✅ Web dashboard (React)
✅ Node.js backend with MongoDB