I was able to pull my custom attributes via PowerCLI but I would like to do the same but with the API provided on vSphere Dev Center.
For some reason, I can only pull tags and categories using the CIS api but nothing related to custom attributes.
I saw this related post but I'm hoping this "feature" got already implemented, and I'm doing it wrong
Rest API list Tags and Custom Attributes/Annotatio... - VMware Technology Network VMTN