I am studying and trying to understand the development of an API, however I have some doubts ...
1 - Which language / tool do you recommend for creating an API? I'm using the Slim Framework to learn, is it a good idea?
2 - What is the difference between private and public API Key? When to use? And why do some softwares have public and private keys?
3 - I'm wanting to develop an update API, ie my software will check my API for updates to be made and will soon install this update. Is the API idea good for this case, or is it not?
Thank you.