The Oracle Service Bus got some nice features to monitor its endpoints, see if they are still online and you can enable these Proxy and Business Service endpoints in the Operations view of the SBConsole. In OSB you can also make a SLA alert rule to reports these endpoint changes to the SBConsole, send a mail , SNMP trap or publish on a JMS queue.
These options are not enabled by default, you need to do the steps, I describe in this blogpost..
When you create or deployed some new Proxy and Business Services you won't see these endpoints in the Service Health Tab of the Operations View.
When you disable the endpoint and take a look at the Service Health, you will now see that the endpoint is Offline
Open the SLA Alert Rules Tab of the Proxy and Business Service.