You can always find the latest api docs here: http://docs.openstack.org . And here's the specific page you need: http://docs.openstack.org/api/openstack-compute/1.1/content/List_Addresses-d1e3014.html (http://docs.openstack.org/api/opensta...) . So the format you see currently is correct. We used to map fixed and floating ips to private and public networks, respectively. That behavior was incorrect, so we now expose the networks with their actual ids.

I understand the frustration, but right now there isn't a dependable way to get fixed vs floating out of that data structure. However, you could try to use the os-floating-ips resource (it's an extension). A call to GET /v2/<tenant_id>/os-floating-ips/ will return a list of floating ip objects allocated to the given project. From that info you can see each floating ip, what fixed ip it is associated with, and what instance it resolves to. Hopefully that gets you enough information for now.