This paper describes a server diagnostic module toolkit which provides for the non-intrusive inspection and/or data transformation of stages, modules, and data on a server utilizing a request-response protocol. Diagnostic modules are installed on a server so that diagnostic commands may be sent by a client within an otherwise normal request and received by the server to invoke debugging and monitoring functionality during the normal runtime processing of the server. Diagnostic data may then be stored and later retrieved so that debugging and monitoring may be accomplished without disturbing the normal processing of requests by the server.