Prasaanth,
The ICM PG MR protocol is not public. We do not distribute the API documentation. Bucher and Suter has a product that allows you to take advantage of media routing functionality like reserving agents and routing media requests. Bucher and Suter's product utilizes the MR protocol.
Details are here:
http://www.bucher-suter.com/en/products/bucher-suter-software.html Thanks,
Ted