This study presents the synthesis and characterization of carboxylate-based metal-organic framework (MOF) glasses through melt-quenching of Mg2+ or Mn2+ containing adipate ligands. The MOFs exhibit low melting temperatures (284 °C for Mg2+ and 238 °C for Mn2+) compared to zeolitic-imidazolate framework (ZIF) glasses, and superior mechanical properties in terms of hardness and elastic modulus. The low melting temperatures are attributed to the flexibility and low symmetry of the aliphatic carboxylate ligand, which increases the entropy of fusion and reduces the enthalpy of fusion. The research highlights the potential of carboxylate-based MOFs for the development of malleable MOF structures, expanding the range of liquid/glass MOF materials. The study also provides insights into the structure-property relationships of MOF glasses, offering a promising approach for the creation of new MOF-based materials.This study presents the synthesis and characterization of carboxylate-based metal-organic framework (MOF) glasses through melt-quenching of Mg2+ or Mn2+ containing adipate ligands. The MOFs exhibit low melting temperatures (284 °C for Mg2+ and 238 °C for Mn2+) compared to zeolitic-imidazolate framework (ZIF) glasses, and superior mechanical properties in terms of hardness and elastic modulus. The low melting temperatures are attributed to the flexibility and low symmetry of the aliphatic carboxylate ligand, which increases the entropy of fusion and reduces the enthalpy of fusion. The research highlights the potential of carboxylate-based MOFs for the development of malleable MOF structures, expanding the range of liquid/glass MOF materials. The study also provides insights into the structure-property relationships of MOF glasses, offering a promising approach for the creation of new MOF-based materials.