To support the research communities to take up open science and foster the involvement of scientists in EOSC, OSCARS has launched two Open Calls (in total worth about 16 million Euro) to select third parties for the development of new, innovative Open Science projects or services, that together will drive the uptake of FAIR-data-intensive research throughout the European Research Area (ERA). Projects can be proposed in any of the Science Clusters and beyond, by any researcher or group of researchers. Selected projects will be funded through a cascading grant mechanism. The first Open Call was launched on the 15th of March 2024.