FORM API (x-www-form-urlencoded API)

This type of Liveall.eu API is based on the form x-www-form-urlencoded type of web-requests (POST) as described here: POST HTTP - MDN Web Docs
The Content-Type
on the request headers is set to application/x-www-form-urlencoded
Note
If you like to send multiple SMS with one request you are advised to use the JSON API (application/json API), which offers more flexibility.
Below are the available actions for this type of API