With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cPtpClockPortDSEntry
Cisco Ptp Clock Port DS Entry
1.3.6.1.4.1.9.9.760.1.2.8.1
An entry in the table, containing port dataset information for a single clock port.
Back to CISCO-PTP-MIB MIB page.
IPHost Network monitor allows you to monitor cPtpClockPortDSEntry 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.