You can easily send a message to any Whatsapp number using this endpoint. Follow steps bellow:
Authenticate: Before sending a request to “send” endpoint, you have to call “qrcode” and scan it’s response by your WhatsApp application and also get the id and token from callback. Here you can read more about this.
Call endpoint: After a successfull call to endpoint “qrcode” you are ready to use “send”. There are 4 parameters to be sent in the body of the request: