I have set up 9.8 Active IQ REST Swagger UI and while collecting data with the help of exposed URLs have observed below listed issues :
Active IQ Unified Manager REST API lists more qtrees than the actual count available on Active IQ admin portal, On REST it is 100 and on Active IQ it is 20; (See: qtree_comparison.png [attachment removed by user request])
Active IQ Unified Manager REST API shows less number of aggregates than the list of aggregates available on the Active IQ admin panel, (See: aggregates.png [attachment removed by user request])
This is the actual URL I tried to fetch the aggregate details from REST UI : curl -X GET "https://[ip_address]/api/datacenter/storage/aggregates " -H "accept: application/json" -H "UM-CSRF-Token: 1a2b3c4d-1234-1234-abcd-1a2b3c4d5e6"
Please find the resource on which this query was executed (See attachments: Resource.PNG, Swagger_UI.PNG)
The URL you gave for cluster view, I was not able to find it either on ONTAP Cluster Swagger as well as on the Active IQ Unified Manager REST Swagger UI.
Sorry, I thought you were talking around Active IQ (the original - the website/Mobile App/API - https://activeiq.netapp.com ). You are talking about Unified Manager. I can't help with that. You can get that information from Active IQ's API also.