The list of the GASP monitored blazars includes 28 bright objects: 3C 66A, AO 0235+16, PKS 0420−01, PKS 0528+134, S5 0716+71, PKS 0735+17, OJ 248, OJ 49, 4C 71.07, OJ 287, S4 0954+65, Markarian 421, 4C 29.45, ON 231, 3C 273, 3C 279, PKS 1510−08, DA 406, 4C 38.41, 3C 345, Markarian 501, 4C 51.37, 3C 371, PKS 2155−304, BL Lacertae, CTA 102, 3C 454.3 and 1ES 2344+514.