Use Case
OTP & Authentication
Secure your platform with Zero-Cost OTP Verification
Traditional gateways charge exorbitant international rates for simple 6-digit codes. With Paulina SMS Gateway, you can route OTPs directly through your own localized Android devices globally, slashing your verification costs to zero while maintaining sub-second delivery latencies.
Architecture Flow
User requests Login / 2FA
Your Backend calls our API
Paulina Cloud routes payload
Local Android Phone sends SMS instantly
Webhook Real-time Feedback
Platform pings your Server instantly{
"id": "evt_8fnd9k2",
"type": "message.delivered",
"data": {
"_id": "64f9b2d...",
"to": "+351912345678",
"status": "DELIVERED"
},
"created_at": "2026-04-16T08:00:00.000Z"
}Core Technical Advantages
Why engineers choose Paulina SMS Gateway for this workload
Zero Variable Costs
Stop paying per-message fees. Leverage unlimited local SIM cards to send millions of verification loops.
Fraud Protection
Bypass typical gateway spoofing by sending originating SMS directly from trusted in-country phone numbers.
Sub-Second Latency
Direct P2P delivery via WebSockets ensures your OTPs arrive before the end-user's session focus drops.