SMS and WhatsApp Verify API

Instantly add a complete, ready-to-use solution for verifying user identities worldwide. Leverage the best channel for each customer using a single Verify API.

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Screenshot of TopMessage app verify API dashboard

Screenshot of the TopMessage interface displaying Verify API activity, including verification status, delivery results, and code validation performance.

Elderly man smiling at his phone after successfully receiving a verification code sent through the TopMessage Verify API.

Elderly man checking his phone as he opens an automated verification code delivered through the TopMessage Verify API for a taxi service login.

Woman viewing a banking login verification code generated and delivered through the TopMessage Verify API.

Woman interacting with her phone while completing a two-step verification process powered by the TopMessage Verify API.

Verification as a Service

TopMessage provides an easy all-in-one solution that strengthens security while improving the customer experience.

Our Verify API enables you to generate, send, and verify one-time password (OTP) codes via SMS and WhatsApp. On top of that, it provides detailed reports on the status of each phone number.

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Available Channles

Verify your customers with SMS and WhatsApp

SMS API Verification

Verify phone numbers using simple time-based OTPs.

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WhatsApp API Verification

Send verification passwords through the channels your users use every day.

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API Verification

Integrate the Verify API in Just 5 Minutes

OTP Codes Generation

Automatically create OTP codes with custom length and expiry time for fast, secure, and seamless verification.

Screenshot of TopMessage code delivery page.

Fast Delivery

OTP codes delivered in seconds to keep users engaged instantly. Smooth, quick, and made to give you confidence.

Real-Time Verification

Codes are checked in real time. Valid codes are approved and invalid ones rejected ensuring secure authentication.

Code Conversion Statistics

Monitor each sent code’s status. Use conversion insights to improve business performance and user experience.

FAQs

What is the Verify API and how does it work with TopMessage?

TopMessage Verify API enables you to verify your users with a single integration. Our verification API manages the entire process: it generates and delivers codes, validates them, and provides detailed reports on the status of each phone number.

How can I set up OTP generation for user verification?

You can set up OTP generation by integrating the TopMessage Verify API into your application. Verify API automatically generates a one-time password based on your chosen code length and validity period, sends it to the user through SMS or WhatsApp.

What security features are available for the Verify API?

The Verify API includes multiple layers of built-in security. All OTPs are delivered through trusted channels, and every code is verified server-side to prevent tampering.

How can I use the Verify API for SMS and WhatsApp verification?

You can use the Verify API to run a complete OTP verification flow across both SMS and WhatsApp without building separate systems. Simply select the channel, call the Verify API from your application, and TopMessage handles OTP generation, delivery, and verification automatically.

API Verifications

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