OTP Verification

Verify numbers with SMS & voice OTP

Send one-time passwords through smart-routed SMS or automated voice calls. Faster delivery, lower cost, and full control over your verification flow.

Get Started →API Docs
OTP Verification FlowLive
API Request
POST /v1/phone-verifier/send-verification-code
Route Selection
Best route for TR: Gateway 743 (€0.008)
OTP Sent
SMS delivered to +90 532 *** **41
4
User Enters Code
Waiting for 6-digit code...
5
Verified
POST /v1/phone-verifier/verify-code
94%
Verification Rate

Codes delivered and verified successfully

200+
Countries

Global coverage with local routes

<3s
Delivery Time

Average time from API call to SMS received

75%
Cost Savings

vs flat-rate providers like Vonage

How It Works

Two API calls. That's it.

1

Send Verification Code

Call the API with a phone number. We pick the best route, generate a code, and deliver it via SMS or voice.

2

User Enters Code

Your user receives the OTP and enters it in your app. Codes expire after a configurable timeout.

3

Verify the Code

Call the verify endpoint with the code. We confirm it matches and return success. Done.

Send OTP
curl -X POST https://api.smsedge.com/v1/phone-verifier/send-verification-code \
  -H "X-API-KEY: YOUR_API_KEY" \
  -d '{"number": "+905321234567", "country_id": 225}'
Response:
{ "success": true, "data": { "request_id": "a1b2c3d4", "normalized_number": "905321234567" } }
Features

Built for developers, priced for scale

SMS OTP

Send one-time passwords via SMS to any mobile number worldwide. Delivered in seconds through optimized routes.

Voice OTP

Automated voice calls that read the verification code aloud. Ideal for landlines or when SMS delivery is unreliable.

Global Coverage

Verify numbers in 200+ countries with smart routing that selects the cheapest and fastest delivery path.

Sub-Second Delivery

OTP codes are delivered within seconds. Configurable expiry and retry policies keep the flow smooth.

Real-Time Analytics

Track delivery rates, verification success, and costs per country on a live dashboard.

Simple API

Two endpoints: send and verify. Drop-in replacement for Twilio or Vonage with the same response format.

Why switch from Vonage or Twilio?

Flat-rate OTP providers charge the same price regardless of destination. Our smart routing picks the cheapest reliable route for each country, cutting your verification costs dramatically.

  • Smart routing picks the cheapest route per country
  • Up to 75% cheaper than Vonage or Twilio
  • Same API format — easy migration
  • Built-in rate limiting and fraud prevention
  • DNC and compliance checks on every request
  • Full reporting: per-user, per-country, per-route
OTP DashboardLast 24h
Sent
12,480
+1,840
Verified
94.2%
+0.8%
Avg Cost
€0.008
-€0.002
Top Countries
TRTurkey4,21096%€0.008
BRBrazil2,89093%€0.012
INIndia2,14091%€0.005
DEGermany1,68097%€0.035

Frequently asked questions

Complete your stack

Explore more channels to reach your audience.

SMS Marketing

Send marketing campaigns with smart routing, A/B testing, and conversion tracking.

Email Marketing

Multi-vendor email sending with warmup and deliverability tools.

Ready?

Start verifying numbers today

Two API calls to verify any phone number. No monthly fees, no minimums.

Create Free Account →