Here are two posts that show you how to use Wireshark to sniff the raw HTTP traffic between your laptop + UCS manager, and also how to turn on and use Java logging of your session:
Fish the UCS API pool with Wireshark
Spy on the UCS API with Java Logging
Nice pair of posts, Steve. I did poke around in Wireshark briefly spying on the UCS manager before quickly disabling HTTP access.
I am really happy with the open API approach Cisco has taken with 1000v and UCS. Hopefully this means an end for nasty automation efforts using SSH and screen scraping.