Power BI API for IMPORT pbix files

Hello guys, all right?

I'm working on an application so that you can send multiple files to pbix different organizations of power bi.
My goal is to make this application in Delphi (for various reasons), with that, I have a few questions, and would be grateful if you guys could help me.

1) In these organizations, only the Power BI service is purchased, they will not have the azurre and not the 365.
It would not have problem?

2) To get the token, you do not need to install any security software?
https://powerbi.microsoft.com/en-us/documentation/powerbi-developer-authenticate-to-power-bi-service/#clientID

3) To make the import pbix file is only necessary to get the token?

Thanks guys!!!