Km4City is partecipating at the Open Challenge of 14th International Semantic Web Conference (ISWC2015) Bethlehem, PA, USA, October 11-12, 2015 http://challenge.semanticweb.org/2015/submissions/ !!!! Abstract. our cities are not so smart as they could be Many times on traveling we realize the needs of getting more specific information that what we can get from Goole, OpenStreet Map, Here, TomTom, etc. In most cases, the information is too complex and expensive for them to be profitable. This is true since the information is in the hands of public administrations, mobility operators, private services, parking companies, etc. Km4city provides a unique point of access for interoperable data of a city metropolitan area via web and mobile applications. Km4City covers aspects of mobility and transport, energy, banks, parking, commercial, culture, bike paths, garden areas, health, tourism, end much more. Florence area in Italy has, since July 2015, a demonstrator of this solution.