Why is there no GET API for compute_attributes?

I've been working with compute profiles and compute attributes to build
hosts from the Foreman API. It seems like there should be a GET API to get
back the id of compute attributes that are created. I can't think of any
other way to get these back in the case where I need to make an update to a
set of compute attributes. There is a PUT API for compute attributes that
allows updating, but again no way to get the id of the compute attribute
set in order to actually perform an update.