The VCFA APIs are not available in the Developer Portal – Download VCF 9.0 OpenAPI Specifications along with other products.
VCF Automation 9.0.x
It is possible to get the OpenAPI spec from the tenant kubernetes context.
$ kubectl get --raw /openapi/v3 | jq '.paths | with_entries(select(.key | contains("vmware.com")))'
{ "apis/authorization.cci.vmware.com/v1alpha1": { "serverRelativeURL": "/openapi/v3/apis/authorization.cci.vmware.com/v1alpha1" }, "apis/infrastructure.cci.vmware.com/v1alpha1": { "serverRelativeURL": "/openapi/v3/apis/infrastructure.cci.vmware.com/v1alpha1" }, "apis/infrastructure.cci.vmware.com/v1alpha2": { "serverRelativeURL": "/openapi/v3/apis/infrastructure.cci.vmware.com/v1alpha2" }, "apis/project.cci.vmware.com/v1alpha2": { "serverRelativeURL": "/openapi/v3/apis/project.cci.vmware.com/v1alpha2" }, "apis/topology.cci.vmware.com/v1alpha1": { "serverRelativeURL": "/openapi/v3/apis/topology.cci.vmware.com/v1alpha1" }, "apis/topology.cci.vmware.com/v1alpha2": { "serverRelativeURL": "/openapi/v3/apis/topology.cci.vmware.com/v1alpha2" }, "apis/vpc.nsx.vmware.com": { "serverRelativeURL": "/openapi/v3/apis/vpc.nsx.vmware.com" }, "apis/vpc.nsx.vmware.com/v1alpha1": { "serverRelativeURL": "/openapi/v3/apis/vpc.nsx.vmware.com/v1alpha1" }}
The VCFA REST APIs are due to be added to the wider VCF 9 OpenAPI spec at a later date.