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In the title compound, [Ag(C6H5NO2)2]ClO4, the AgI atom shows an almost linear coordination geometry, defined by two N atoms from two pyridine-3-carboxylic acid ligands. The complex cations are linked by hydrogen bonds between the carboxyl groups into a chain. The chains are further connected through C—H...O hydrogen bonds and a weak Ag...O interaction [2.757 (8) Å] into a layer. Another Ag...O interaction [2.899 (2) Å] and a C—H...O hydrogen bond connect the layers into a three-dimensional network.