Data API to List TypeNames?

Is there a Data API Endpoint to list available typenames?

do you mean something like a swagger file?

If I can discern all of the available data types for a users app then yes that should work.

Well, while the swagger does give you that, the mapping between the datatype/Thing friendly names and their endpoint names can be pretty loose. There’s probably some undocumented way to get them but I don’t know it.

I don’t know what that means yet, but I expect I will soon. Thanks for the pointer in the right direction