The main goal of the study is development of the classification framework of smart service attributes as a first step in developing methodology of smart services implementation for Enterprise Information Portal (EIP) maintenance. First, we analyze available definitions of the “smart services” concept and concepts related to it: smart services are based on the idea of co-creation of value and rely on machine intelligence in connected systems. Second, we describe attributes of EIP services. Finally, we propose a new extended approach of the smart service attributes classification based on the list of characteristics of the EIP services. Our results contribute to the field of smart service research as well as to EIPrelated studies both for academics and practitioners, as the proposed classification framework could serve as a basis for creation of smart services typology for the purpose of EIP maintenance.