Enterprise SMS & Authentication Gateway

2Factor Developer Portal

Add bank-grade SMS OTP verification, transactional alerts, and voice authentications to your application in minutes. Built on global Tier-1 infrastructure with real-time routing.

Explore API Docs Documentation

10 Billion+Messages per year

99.99%Platform Uptime

5K+Active Developers

120msAvg Delivery Latency

Self-Healing Routing

Most SMS gateways suffer delivery drops during operator outages. 2Factor continuously monitors operator health and automatically reroutes traffic around cellular congestion.

Simulate Network Congestion

All Tier-1 carrier channels are healthy. Messages are distributed load-balanced for optimal performance.

Engineered for High-Delivery

Skip the hassle of negotiating with network carriers. 2Factor provides API layer reliability out of the box.

Zero-Logic Verification

2Factor manages the lifetime generation, storage, and validation of OTPs, meaning you write less auth logic.

Developer-First DX

Clear, language-rich REST APIs, Sandbox modes, and direct copying of snippets to go live in minutes.

Dual Voice & SMS Routing

Automatic fallback to Voice OTP if SMS networks are congested, ensuring your users are never locked out.

Integrate in 5 Minutes

Choose your stack, copy the request format, and run the API instantly.

curl -X POST https://api.2factor.in/v1/sms/otp \
  -H "Content-Type: application/json" \
  -d '{
    "apiKey": "YOUR_API_KEY",
    "to": "+919999999999"
  }'