3/19/2026 at 2:04:29 PM
The sub-pages of, for example, https://catdat.app/categories and https://catdat.app/properties all give an "Error: 403". :-(by aleph_minus_one
3/19/2026 at 12:19:34 AM
A comprehensive database of categories and their properties
https://catdat.app/by mathgenius