Rpc4cl is an implementation of XML-RPC for CL using ,according to its author, best of breed common lisp libraries to do most of the work. These dependencies are as of version 0.3.0: drakma, cxml, cl-ppcre, parse-number, babel, trivial-timeout To run the tests you need hunchentoot in addition to the dependencies for rpc4cl and a ruby installation. No good idea to only use rpc4cl to test rpc4cl, right? Then just run rpc4cl:start-test-server and locate and run client.rb from ./test/. The test suite will also serve as an instructive example of how to make use of rpc4cl. This version of rpc4cl uses in addition to the already mentioned dependencies: rfc3339-timestamp for parsing xml-rpc date-time strings into a rfc3339:timestamp object.