Use cases · Technology

WhatsApp OTP and login codes for apps and websites

Send one-time passwords and alerts on WhatsApp through a simple API

How apps, SaaS products and websites in India use the Awaaz API to send WhatsApp OTP and login codes, transaction alerts and notifications, with delivery status and webhooks.

The problem

SMS OTPs are delayed, blocked by DLT rules or never arrive, and users drop off at sign-in. Building directly on Meta's API means templates, number registration and webhooks before the first message.

How Awaaz helps

  • Awaaz sets up a dedicated number and the authentication template for login codes, approved by Meta.
  • Your backend calls one API endpoint with the phone number and code; delivery and read status come back by webhook.
  • The same API sends order alerts and notifications from approved templates.
  • Usage, failures and delivery are visible in the dashboard.

What it looks like

Business: 483 920 is your verification code. For your security, do not share this code. [Copy code]

Set it up

  1. Set up a new number in Awaaz for login codes.
  2. Create an API key in Settings.
  3. Send a test code to your own phone from the onboarding screen.
  4. Add the API call to your login flow.

What changes

  • Codes arrive on an app users already have open.
  • Your team ships WhatsApp OTP without building the Meta integration.
  • Delivery is tracked per message.

Features used

Authentication templates · REST API and API keys · Delivery webhooks · Dedicated number setup

Questions

What does a WhatsApp OTP cost?
Meta charges an authentication rate per message, billed to your business directly. Awaaz adds no per-message fee.
Can I use the same number for customer chats?
We recommend a separate number for login codes, so codes and customer conversations don't mix.

Start free trial Try it on your own WhatsApp number, free for 14 days.

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