Metal-organic frameworks (MOFs) are versatile materials, but their synthesis often requires harsh conditions, toxic precursors, or organic solvents. Recently, MOFs have been produced using resonant acoustic mixing (RAM), a form of mechanochemistry that provides a greener alternative to conventional methods. In this study, we demonstrate the solvent-free synthesis of fumarate-based MOFs using RAM at room temperature and atmospheric pressure. Iron fumarate (MIL-88A(Fe)) was successfully produced with a BET surface area of 209 m