The most reliable SMS & WhatsApp OTP gateway for Indian developers. Instant delivery, transparent pricing, zero maintenance.
curl -X POST https://otpwallah.in/api/v1/send/sms \
-H "Authorization: Bearer ak_YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"mobile": "9876543210",
"length": 6,
"expiry": 10
}'{
"status": true,
"message": "OTP sent successfully",
"request_id": "sms_a1b2c3...",
"wallet_balance": 499.20,
"cost": 0.80
}Built for developers, designed for scale
OTPs delivered in under 2 seconds via optimized routing
AES-256 encryption, IP restrictions, rate limiting built-in
Pay per OTP. No hidden fees, no monthly minimums
Clean REST API, SDKs for 7 languages, Swagger docs
Track delivery rates, spending, and API usage in real-time
Manage your account and get alerts directly in Telegram
Send OTPs via WhatsApp for higher open rates
Create unlimited API keys with IP & domain restrictions
Only pay for what you use
Register with your mobile number. Verify via OTP.
Recharge wallet via UPI/QR. Instant activation.
Create an API key with optional IP restrictions.
Call our REST API. OTPs deliver in seconds.
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