Bumping this topic because I had the same question. For categories, it’s relatively easy to look at the URL:
https://meta.discourse.org/c/announcements/67
^^
But I can’t find anything like that for groups. An ideal location for that would be on the group profile page (/g/[group_name]/manage/profile) somewhere. It’s not a huge problem of course (Data Explorer is my security blanket), but it is an annoyance when working with the API.