With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cPtpClockPortDSTable
Cisco Ptp Clock Port DS Table
1.3.6.1.4.1.9.9.760.1.2.8
Table of information about the clock ports dataset for a particular domain.
Back to CISCO-PTP-MIB MIB page.
IPHost Network monitor allows you to monitor cPtpClockPortDSTable 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.