XML-RPC - Multiple calls over same connection

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Login once and then succesive calls must assume those credentials.
The following is nice but "login profiled behaviour" is still a question, (or not? can we configure SSH env. such that it will proxy to different rpc servers based on auth. profile? and if yes, isn't multiple rpc servers a complication?)

The default implementation uses HTTP as a transport, but that is
not a requirement. You just have to be able to serialise the request
and response parameters into an XML stream. The xmlrplic loads and
dumps functions will do that for you.

In one of my projects I actually use XML-RPC over SSH and deal with
the authentication etc at the SSH level. (I use the excellent pure
Python paramiko library for the SSH protocol part).