How can I monitor the number of outgoing WCF requests?

We're trying to track down some performance issues with an application and would like to figure out how many outgoing requests are being triggered by each page load. I can find lots of counters for showing incoming WCF connections, but nothing tracking how many are going out. Any ideas short of retrofitting all of the pages with custom counters?

From stackoverflow

• You could set up tracing and use the Trace View Tool or you could go lower level and use Wireshark to monitor the outgoing network activity.