I’m currently trying to retrieve all devices from my home network into my C# code. I found the opportunity to use the Fritzbox API. I can easily login and obtain the SID for further requests, but when I call the getdevicelistinfos method, it just returns:
<devicelist version="1" fwversion="7.57"/>.

The URL I request is: http://fritz.box/webservices/homeautoswitch.lua?0=0&sid=secret&switchcmd=getdevicelistinfos

Maybe this endpoint doesn’t return all devices, but that’s what I understood.

Tried to modify the request URL.