The "org.jboss.as.web" module corresponds to the module built in the "web" subdirectory of AS - it's just the deployer and subsystem classes for the "web" subsystem, it doesn't affect the deployment class path in any way. To put things on the deployment class path, your deployment unit processor has to add the libraries as a dependency. For a good example of how to do that, look at org.jboss.as.weld.deployment.processors.WeldDependencyProcessor (in particular, note how dependencies are added).