The European Commission’s Connecting Europe Facility (CEF) Digital programme has launched calls for proposals that aim to further increase the number of implementations of eDelivery based on the AS4 open technical specification, as profiled in the e-SENS Large Scale Pilot. The call is open to users of e-SENS AS4 (public administrations or businesses) but also to providers of AS4 software and services. The purpose of this initiative is to further enlarge the ecosystem of market solutions for eDelivery, indirectly supporting electronic data and document exchange initiatives in a wide variety of sectors.