Synchrotron X-ray powder diffraction (XRPD) data were collected for the silver(I)-aspartame complex [Ag(C14H17N2O5)]∙1∕2H2O. The complex was obtained from a stoichiometric mixture of aspartame (3-amino-N-(α-carboxyphenethyl)-succinamic acid N-methyl ester, C14H18N2O5), Na2CO3, and AgNO3. Indexing using Crysfire and Chekcell proposed an orthorhombic unit cell with space group P2221. The lattice parameters are a=12.4750(1) Å, b=21.60614(14) Å, and c=4.88888(9) Å.