The replacement of fossil fuels with renewable energies is an integral part of fighting the global climate crisis. Green hydrogen, produced with renewable energies, is one of the most promising energy sources. The unsurpassed high storage density of liquid hydrogen offers great advantages, especially on long transport routes, due to the higher volumetric energy density in liquid hydrogen, compared to pressurized hydrogen. By magnetocaloric cooling the efficiency of the energy-intensive liquification of hydrogen will be increased. We will introduce the RE-X₂ cubic Laves phases (Mg₂Cu-type), as a material system with high magnetocaloric figure of merit and a working-temperature span, ideal for low temperature hydrogen liquification. Thermodynamic characterizations and shaping solutions towards working in liquid hydrogen environment will be presented.