@3bruno In an API operation to access an MO on a specific node device in the fabric, the resource path consists of /mo/topology/pod-number/node-number/sys/
followed by the node component. For example, to access a board sensor in chassis slot b of node-1 in pod-1, use this URI example to get physical interface statistics
api/node/mo/topology/pod-1/node-101/sys/phys-[eth1/1].json
Hope this helps.