The WhatsApp Number Checker API is an application programming interface that allows developers to verify if a given phone number is registered on the WhatsApp messaging platform.

To use the API, you need to make a request by providing the phone number along with its country code (without the + symbol). The API will then return a response indicating whether the number is active on WhatsApp or not.

The API will return a response indicating whether the provided phone number is registered on WhatsApp or not.

To call the API, you need to make an HTTP request to the API endpoint, passing the phone number as a parameter in the request. Make sure to include the country code without the + symbol.

If the provided phone number is not registered on WhatsApp, the API will return a response indicating that the number is not active on the platform.

The API returns a JSON response that indicates whether the provided phone number is registered on WhatsApp. It includes fields such as "status" (true/false), "numberstatus" (indicating if the number is active), and "businessnumber" (indicating if it's a business account).

The key fields in the response are "balance" (remaining API calls), "status" (true if the number is on WhatsApp), "numberstatus" (false if not active), and "businessnumber" (true if it's a business account).

The response data is structured in JSON format, with key-value pairs. For example, a typical response might look like: {"balance":43332,"status":true,"numberstatus":false,"businessnumber":false}.

The primary parameter for the WhatsApp Number Checker API is "number," which must include the phone number along with its country code, formatted without the "+" sign.

The endpoint provides information on whether a phone number is registered on WhatsApp, its activity status, and if it belongs to a business account, aiding in user verification and engagement.

Users can utilize the returned data to validate contact lists, enhance customer engagement strategies, and ensure accurate communication by identifying active WhatsApp users.

Data accuracy is maintained through regular updates and checks against WhatsApp's user database, ensuring that the information provided reflects the current status of phone numbers.

Typical use cases include user verification during account registration, targeted marketing campaigns, contact list management, and enhancing customer service through WhatsApp communication.

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