Here are the OIDs I found for Cisco BGP

List of BGP peers: .1.3.6.1.2.1.15.3.1.1
BGP state: .1.3.6.1.2.1.15.3.1.2
Number of received prefixes: .1.3.6.1.4.1.9.9.187.1.2.4.1.1