# Check Whether a Number Has an Active WhatsApp API | FastKYC

> Check whether an Indian mobile number is registered on WhatsApp and whether it is a personal or business account, before you message a customer.

Source: https://www.fastkyc.com/apis/whatsapp-check/

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[Utility](/apis/utility/)

# Whatsapp Check API

Check whether an Indian mobile number is registered on WhatsApp and whether it is a personal or business account, before you message a customer.

[Book a Demo](/book-demo/)

Overview

## What the Whatsapp Check API does

Whatsapp Check reports whether a mobile number has an active WhatsApp registration and distinguishes a personal account from a business one.

If WhatsApp is a channel you use for onboarding or support, this tells you in advance whether a number can be reached that way, so you can route to SMS instead of discovering the failure after sending.

## Built for

[Telecom](/industries/telecom/)

Use cases

## Where teams use the Whatsapp Check API

-   Confirming reachability before starting a WhatsApp KYC journey
    
-   Routing communication between WhatsApp and SMS
    
-   Identifying business accounts among merchant contacts
    
-   Cleaning a contact list before a messaging campaign
    

## Frequently Asked Questions (FAQs)

## Related APIs

-   [Contact Details by GST APIFetch the mobile number and email address registered against a GST number, giving you verified contact details for a business you are onboarding.](/apis/gst-to-contact-details/)
-   [Pan Udyam Check APICheck whether a PAN is registered under the Udyam MSME system, confirming small business status from a PAN alone for MSME lending and schemes.](/apis/pan-udyam-check/)
-   [ESIC Details APIVerify an ESIC number and retrieve the registered employee's basic details from Employees' State Insurance records, for employment and payroll checks.](/apis/esic-verification/)
-   [Face Liveness APIDetect whether a face is a real, live person rather than a photo, video or mask, blocking presentation attacks during onboarding.](/apis/face-liveness/)

## Start verifying with the Whatsapp Check API

Book a walkthrough and we will show the call, the response and how it fits your onboarding flow.

-   One API key for every check
-   Verified against official Indian records
-   Built for onboarding at scale

[Book a Demo](/book-demo/)[Browse All APIs](/apis/)