We should support dynamically loading jars from the registry with Mule. Caching of jars should be done to decrease startup times. From Andrew: Surprisingly, this should be pretty easy theoretically. Look into MuleBootstrap: http://dev.mulesource.com/docs/site/1.4.4-SNAPSHOT/xref/org/mule/modules/boot/MuleBootstrap.html#100 If you feed it the URL, it can then be added to the startup classpath. The only catch here is that of 22. Bootstrap was meant to be a very lean module, one is yet to see what happens after all the galaxy client dependencies are added.