📲 OTP Verification CLI App using Node.js & MSG91

This is a simple command-line based OTP verification system built with Node.js, using MSG91's Flow API to send OTPs to Indian mobile numbers. It supports OTP generation, sending, verification, and resend logic.

🚀 Features

• OTP generation (6-digit)
• SMS delivery via MSG91
• OTP resend option
• CLI-based input for phone and OTP
• Environment variable management with .env

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🛠 Tech Stack

• Node.js
• MSG91 Flow API
• dotenv
• axios
• readline (Node built-in)

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📋 Example Usage

📱 Enter your phone number (with +91 or 10-digit): 9876543210 📩 OTP sent to +919876543210 🔐 Enter OTP or type 'resend': 123456 ✅ OTP Verified!

✨ Acknowledgments MSG91 – for providing the Flow-based messaging API.

Inspired by common OTP flows in mobile/web apps.

📄 License This project is licensed under the MIT License.

📦 Installation

1. Clone the repo

git clone https://github.com/Amith2410/otp-app.git
cd otp-app


npm install
FLOW_ID=your_msg91_flow_id
AUTH_KEY=your_msg91_auth_key

node otp.js