Right now the URLs aren’t strictly persistent, were an item’s name to change the URL would change.
That’s certainly something I could add redirects for though, I’ll have a look at that.
(Additionally, there is some mangling for filesystem reasons; The characters < > : ? * get removed, double quote " is swapped to two single quotes '', and / \ | ? are replaced with a hyphen -)
EDIT: /type/{typeID} redirects are added now as a hotfix, other redirects with the next feature update.