Creating custom Discord widget

We are using Discord for the tech support and the features discussion for our software, and we want to show some information on the main site: Members count, online members, number of messages posted in the last month, etc. Basically, we want to do a custom Discord widget, but with a smaller set of features, without interactive parts, and in our design.

I tried to search API documentation to understand if this is possible or not but can't find available API calls for the things we want to implement. Can someone please tell me if it is possible at all and, if yes, which methods should I use for that.

In the perfect world, I'd prefer to use these methods on the client-side without authorization (like official Discord widget is doing now), but if it is impossible server-side and authorization is also ok.