The API allows you to send messages through your projects and services over HTTP/HTTPS, SMTP and SMPP protocols. Ready-made libraries in different programming languages connect to your project and help you send messages from anywhere with a single command. For simplified authorization, instead of a login and password pair, you can use a special API key.
To send a message to Whatsapp, you must use the GET or POST method to call the address:
https://smscentre.com/sys/send.php?login=<login>&psw=<password>&phones=<phones>&mes=<message>&bot=<wa:botnumber>
Examples of sending messages in Whatsapp
Examples:
Sending a message with the text "Hello" to the number "79999999999" in whatsapp "wa:79888888888":