Cisco UCS servers expose hardware health through CIMC on standalone boxes, or centrally through UCS Manager on a managed chassis.
In the CIMC web UI, go to Admin > Communication Services > SNMP and turn it on, setting a community string or SNMPv3 user the same way as any other BMC.
For blades under UCS Manager, SNMP is configured centrally under Admin > Communication Management > SNMP rather than per-blade, and applies fleet-wide.
Standalone CIMC servers are added individually by IP. For a managed chassis, add UCS Manager's own IP as one polling target for chassis-level health, then add each blade's service-profile IP separately for per-blade metrics.