The agINFRA Science Gateway, developed by the Italian National Institute of Nuclear Physics in the context of the EU funded agINFRA project, has been released online at http://aginfra-sg.ct.infn.it/ and has been registered as an official Service Provider for both the Chinese CARSI and the Spanish SIR Identity Federations. Chinese and Spanish researchers belonging to CARSI and SIR can access the Science Gateway with the same credentials they already have. It is enough to select "CARSI (China)" or "SIR (Spain)" in the "Identity Federations" menu which appears in registration page (click "Register" on the top right corner of the gateway home page).