In this paper we would like to present and describe SIE, a transparent, intelligent Web proxy framework. Its aim is to provide efficient and robust platform for implementing various ideas in broad area of Web Mining. It enables the programmer to easily and quickly write modules that improve pages on that site according to personal characteristics of the particular user. SIE provides many features including user identification, logging of users’ sessions, handling all necessary protocols, etc. SIE is implemented in OCaml – a functional programming language – and has been released on GPL. Categories and Subject Descriptors H.3.5 [Information Systems]: Information Storage and Retrieval— On-line Information Services General Terms Intelligent Web proxy framework Keywords SIE, Adaptive Web, WWW, proxy