Are you talking about our CMS channel? We never ended up make any of its APIs or how its internals worked public. There were a few BMC/Marimba PS guys that created some "add-on's" leveraging our access to the product's source code.
The only offical public API, documentation and training we had ever published publically were around the tuner APIs
And of course our PS guys in the past had created an httpd library that could be used as a channel to interact with browsers. One of the old popular channels was the browser based Channel Manager which used the httpd library.