Use /cover api with Shelly2PM

Hi,

I've bought a module Shelly + 2PM and installed it for my roller shutter.
It works fine to open and close but i'd like to know if it's possible to open it in percent.

I saw the api /cover (Cover | Shelly Technical Documentation)

But i received an error 404 for example with this call: 192.168.0.125/rpc/Cover.GetStatus?id=0

Do you have an example to use it with api?

thanks