Secure Authentication

Global OTP Service

Secure two-factor authentication via SMS or Email with 99.9% delivery rates across 190+ countries.

Delivery Rate: 99.9%
Delivery Time: 6s
Countries: 190+
OTPs Monthly: 10B+
OTP API Dashboard with Global Analytics

Security Features

Enterprise-grade protection for your authentication flows

One-Time Codes

Unique codes that expire after single use

Fraud Prevention

Advanced algorithms detect suspicious attempts

Configurable Expiry

Set OTP validity from 30 seconds to 10 minutes

Custom Length

4-8 digit codes based on your security needs

No Message Content

OTP codes never appear in plain text

Dedicated Infrastructure

Isolated servers for maximum security

Implementation

Get started with OTP verification in 4 simple steps

STEP 1

Integrate API

Add our OTP API to your authentication flow

STEP 2

User Request

User initiates action requiring verification

STEP 3

OTP Delivery

We send the code via SMS or Email

STEP 4

Verification

User enters code which we validate

Trusted by security-conscious businesses

Our OTP API meets the highest industry standards for security and compliance

GDPR

GDPR Compliant

Full data protection compliance

ISO

ISO 27001

Information security certified

SOC

SOC 2 Type II

Audited security controls

HIPAA

HIPAA Ready

Healthcare data protection

OTP Use Cases

Industries securing their operations with our API

Mobile Apps

Secure login and transactions

Banking

Financial transaction security

Enterprise

Corporate system access

Healthcare

PHI access protection

SaaS

Customer account security

E-commerce

Checkout protection

Integration Methods

Multiple ways to implement OTP verification

REST API

Simple HTTP endpoints for OTP generation and verification

// Generate OTP
POST /otp/send
{
  "channel": "sms",
  "recipient": "+1234567890",
  "length": 6,
  "expiry": 300
}

// Verify OTP
POST /otp/verify
{
  "request_id": "req_123",
  "code": "123456"
}
Ready to get started?

Ready to Transform Your Communications?

Join hundreds of businesses across Africa who trust Sendexa for their mission-critical messaging and payments