The MOB URL we use for obtaining the ESXi host datastore details is as follows:
https://<ESXiHOST_IP>:<ESXiHOST_PORT>/mob/?moid=ha-folder-datastore
where
ESXiHOST_IP ---> IP address of the ESXi host server
ESXiHOST_PORT ---> Port number of the ESXi host server