Sending marketing or any unsolicited messages to users is not allowed and you would put you WhatsApp number in a high risk of getting banned.
WhatsApp communication is not suitable for all business cases, so we recommend to design a legit and user-consent communication strategy in order to avoid any problems.
This also includes command-line tools such as cURL, httpie, and graphical tools like Postman.
Please note this validation only does validate of the given phone number format is valid or not, but it will not validate whether it’s linked or not to an existing WhatsApp account.
For WhatsApp numbers existing validation please check the article below..
This makes the API easy to integrate with any existing software, CMS, CRM, ERP, etc.
Please check out our API documentation for more details and ready-to-use code examples.