Modular authentication and session management involves the use of discrete modules to perform specific tasks in a networked computing environment. There may be a separate authentication server that verifies the identity of the user and an authorization client that grants various levels of access to users. There may also be an authentication client that receives an initial request from a requesting application and forwards the request to the authentication server to verify the identity of the use. The authorization client may then be invoked to provide the necessary level of access. The use of discrete modules allows multiple business applications to use the same modules to perform user authentication tasks, thus alleviating the unnecessary multiplication of code.