Question about the API/socket

HI, it's just a question .. in the webpage appear that api/socket it could show the next json:

{
  "devices": [...],
  "positions: [...],
  "events": [...]
}

but when I execute the api/socket, I only have the positions and I don't see the devices and events... that is correct?

Correct. You won't always have everything. In fact most of the time it's only one of those things.

Is there a way I can control that ?, I mean, how could I get only the devices.

You can use regular devices API if you want to get a current snapshot.