With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
lldpXMedLocXPoEPSEPortPowerAv
lldp X Med Loc X Po EPSE Port Power Av
1.0.8802.1.1.2.1.5.4795.1.2.11.1.1
This object contains the value of the power available from the PSE via this port expressed in units of 0.1 watts.
Back to LLDP-EXT-MED-MIB MIB page.
IPHost Network monitor allows you to monitor lldpXMedLocXPoEPSEPortPowerAv 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.