Sialate:O-sulfotransferase which catalyzes 8-O-sulfation at the Sia-glycan level using 3'-phosphoadenosine 5'-phosphosulfate (PAPS) as a donor, forming 8-O-sulfated Sia (Sia8S)-glycans. Displays selectivity toward glycolipids such as GM1 gangliosides. . This is the function of WSCD1 (WSC domain sialate O sulfotransferase 1, ENSG00000179314).