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WhatsApp OTP Verification Service
Mezuka OPT
Black Cat Ofc Presents

Verify Users via
WhatsApp OTP

Add powerful WhatsApp OTP verification to any website in minutes. No complex setup. Just plug in our API and go.

📖 View Guide
50+
Free Daily OTPs
3s
Avg Delivery
4
Plans Available
∞
Websites Supported
⚙️ Process

How It Works

Four simple steps to add WhatsApp OTP to your website.

01
✨
Sign Up Free
Create your account, verify via WhatsApp OTP, and get your unique API key instantly.
02
📋
Copy Snippet
Paste our one-line HTML snippet into your website's body tag. That's it.
03
📲
Users Verify
Your users enter their WhatsApp number. They receive a 6-digit OTP instantly.
04
🔐
Secure & Done
OTP verified, access token issued. Your site knows the user is legitimate.
💎 Pricing

Simple, Transparent Plans

Start free. Scale when you need more OTPs per day.

🆓 FREE
$0/mo
50 OTPs / day
  • 50 WhatsApp OTPs daily
  • 1 website connection
  • API key access
  • Basic support
⚡ STARTER
$5/mo
80 OTPs / day
  • 80 WhatsApp OTPs daily
  • 1 website connection
  • Priority delivery
  • Standard support
⭐ POPULAR
🚀 PRO
$12/mo
150 OTPs / day
  • 150 WhatsApp OTPs daily
  • Multiple websites
  • Priority delivery
  • Fast support
♾️ UNLIMITED
$25/mo
Unlimited OTPs
  • No daily OTP limit
  • Unlimited websites
  • Instant delivery
  • Premium support
📖 Guide

Quick Start Guide

Everything you need to integrate WhatsApp OTP in minutes.

🚀 Setup Steps

  1. Sign up with your name, email, website URL
  2. Verify your WhatsApp number via OTP
  3. Your API key is auto-generated
  4. Copy the provided HTML snippet
  5. Paste it into your website
GET /api/requestotp/:phone

📡 API Endpoints

  • Send OTP: GET /api/sendotp/:apiKey/:phone
  • Verify OTP: GET /api/verifyopt/:apiKey/:phone/:otp
  • Refresh Token: POST /api/refresh
  • Check Status: GET /api/optstatus/:phone
  • Opt Out: GET /api/optout/:phone
  • Health Check: GET /api/health

⚙️ How OTP Works

  1. User enters their WhatsApp number
  2. Your site calls our API with their number
  3. We send a 6-digit OTP via WhatsApp
  4. User enters OTP — we verify it
  5. We return an Access + Refresh Token
  6. Use tokens for authenticated requests

🔐 Security Features

  • OTP expires in 5 minutes
  • Max 5 attempts per OTP
  • 60s cooldown between requests
  • Access tokens expire in 15 minutes
  • Refresh tokens last 30 days
  • All hashed with SHA-256
🔗 Quick Setup

Add OTP in 60 Seconds

Connect your website and start sending WhatsApp OTPs instantly — no complex setup needed.

👤 Team

Meet the Owner

😺
Founder & Developer
Nimeshka Mihiran
Building powerful WhatsApp automation tools for developers and businesses across Sri Lanka and beyond. Mezuka OPT Service is designed to make WhatsApp verification simple, reliable, and affordable for everyone.
🐱 Black Cat Ofc Developer Mezuka OPT
📱 +94 721 584 279
💬 Message on WhatsApp