Abstract. In this paper, we present a Notification Agent designed and implemented using Semantic Web Services. The Notification Agent manages alerts when critical financial situations arise discovering and selecting notification services. This agent applies open research results on the Semantic Web Services technologies including on-the-fly composition based on a finite state machine and automatic discovery of semantic services. Financial Domain ontologies, based on IFX financial standard, have been constructed and extended for building agent systems using OWL and OWL-S standard (as well as other approaches like DL or f-Logic). This agent is going to be offered through integrated Online Aggregation systems in commercial financial organizations.