Secure OTP Verification API

OTP Verification API
for Modern Applications

Powerful OTP verification API for user authentication, account security, and transaction verification. Support for SMS, email, and WhatsApp with automatic fallback and fraud prevention.

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Multi-Channel

Send OTPs via SMS, email, and WhatsApp. Automatic channel failover ensures delivery.

Fast Delivery

OTPs delivered in seconds worldwide. Real-time delivery tracking and status updates.

Secure by Default

Built-in rate limiting, fraud detection, and encryption. PCI-DSS and SOC 2 compliant.

Why Choose Our OTP Verification API?

Built for developers who need reliability and security

Developer-Friendly API

RESTful API with predictable JSON responses. Comprehensive documentation, SDKs for popular languages, and sandbox environment for testing.

Node.js, Python, PHP, Go, Ruby SDKs
OpenAPI specification included
Postman collection available
Webhook support for events

Global Reach

Send OTP verifications to 200+ countries with local carrier routes for better deliverability and compliance with regional regulations.

200+ country coverage
Local carrier partnerships
GDPR, TCPA compliant
Multi-language support

Advanced Security

Enterprise-grade security features to protect against fraud, abuse, and unauthorized access attempts.

Rate limiting per user/IP
Suspicious pattern detection
Brute force protection
Code expiration controls

Real-Time Analytics

Monitor OTP verification performance with detailed analytics and insights to optimize conversion rates.

Delivery success rates
Verification conversion tracking
Channel performance metrics
Cost analysis per channel

OTP Verification Use Cases

Secure authentication for every scenario

User Registration

Verify phone numbers and email addresses during sign-up to prevent fake accounts and ensure valid contact information.

Login Authentication

Add an extra layer of security to user logins with OTP-based two-factor authentication (2FA).

Password Reset

Securely verify user identity before allowing password resets, preventing unauthorized account access.

Transaction Verification

Confirm high-value transactions, payments, and money transfers with OTP verification for added security.

Account Changes

Verify sensitive account changes like email updates, phone number changes, or security settings modifications.

Passwordless Login

Enable seamless passwordless authentication by sending OTP codes via email or SMS for quick login.

Simple OTP Verification Integration

Two API endpoints to generate and verify OTPs

1. Generate OTP

POST /v1/otp/generate

{
  "identifier": "+1234567890",
  "channel": "sms",
  "template": "Your code is {{code}}",
  "ttl": 300
}

Response:
{
  "session_id": "sess_abc123",
  "status": "sent",
  "channel": "sms",
  "expires_at": "2026-03-26T10:35:00Z"
}

2. Verify OTP

POST /v1/otp/verify

{
  "session_id": "sess_abc123",
  "code": "123456"
}

Response:
{
  "verified": true,
  "session_id": "sess_abc123",
  "attempts_remaining": 2
}

View Full API Documentation

OTP Verification API for Modern Applications