With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cvbStpTable
cvb Stp Table
1.3.6.1.4.1.9.9.56.1.1.1
This table contains device STP status information for each VLAN.
Back to CISCO-VLAN-BRIDGING-MIB MIB page.
IPHost Network monitor allows you to monitor cvbStpTable 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.