This presentation was given within the event "Trasparenza e dato pubblico: due asset strategici al servizio dell'interesse generale", organised by Polis Lombardia. My intervention followed the first part of the "I dati pubblici in Lombardia e in Europa: una fonte rinnovabile di energia informativa" section. The first part was presented by MArco Panebianco of ARIA. During my talk, I have briefly introduced the context and last results of the Joint Research Centre (JRC), European Commission, studies about Application Programming Interfaces (APIs) strategies and implementation in the public sector. For more information about the API studies the JRC is conducting please consult: https://joinup.ec.europa.eu/collection/api4dt