With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cewProxyAddress
Cisco EnergyWise Proxy Address
1.3.6.1.4.1.9.9.683.1.8.1.3
This object specifies the IP address of the proxy.
Back to CISCO-ENERGYWISE-MIB MIB page.
IPHost Network monitor allows you to monitor cewProxyAddress on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.