With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
vtpDiscoverResultEntry
vtp Discover Result Entry
1.3.6.1.4.1.9.9.46.1.7.2.1
A conceptual row is created for each VTP member which is found through successful discovery.
Back to CISCO-VTP-MIB MIB page.
IPHost Network monitor allows you to monitor vtpDiscoverResultEntry on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.