Send OTPs via WhatsApp in seconds

Ship secure OTPs
over WhatsApp.

A drop-in API to send one-time passwords through WhatsApp. Fast setup, credit-based billing, real-time delivery.

No credit card required REST API + Node SDK example Rate-limited & throttled

Why teams choose us

Built for reliability and developer speed.

Lightning fast

Sub-second dispatch through active WhatsApp sessions.

Secure by default

API key + JWT auth, per-device rate limits, TTL-cleaned OTPs.

Copy-paste API

Simple JSON REST endpoints. Node example included.

Try it now

Generate an OTP link straight to your WhatsApp.

Phone number

Custom greeting

Wire it up in minutes

Two API calls — send and verify.

fetch('https://whatsappotp.solvsutra.space/api/messages/send-otp', {
  method: 'POST',
  headers: {
    'x-api-key': process.env.WHATSAPP_API_KEY,
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    deviceId: process.env.WHATSAPP_DEVICE_ID,
    to: '+919876543210',
    template: 'Your OTP is {{otp}}'
  })
})

How it works

Link WhatsApp

Scan a QR code to link your number.

Send OTPs

One POST call — OTP goes out over WhatsApp.

Simple pricing

Pay only for what you send.

Pay as you go

$0.01

per message sent