ViSpaNeT is a prototype of Virtual Observatory in Space Weather. It was developed in the frame of an ESA/ESTEC contract and in collaboration with several European partners under the leadership of the Etamax company. For this project, CDPP was in charge of 1/ defining the overall system architecture and 2/ a service allowing analysis of Solar Wind data based on AMDA. In ViSpaNeT the user is offered a variety of services connected to a central node; these services include : analysis, nowcast and data provision, forecast, real time monitoring and alerts.