Data to build UI

Hi, I am new to Nix.

When I love to build an UI, what sources do you recommend to fetch the data?

What I strongly prefer, is an online source, that is cared by someone already and has all the data, that an average user is looking for, so name, version, etc

it’s unclear what kind of ui are you talking about?

Is it a [web]interface to manage nix configuration? there were some attempts to do that, none successful as far as i know.

quick search got this: