Junts pel Sí (IPA: [ˈʒuns pəl ˈsi]; English: "Together for Yes",[4] sometimes translated as "Together for the Yes";[5] JxSí) was a Catalan electoral, political and parliamentary alliance focused on achieving the independence of Catalonia from Spain.

[10] The constituent parties of JxSí formed a minority government after the 2015 election with confidence and supply support from the CUP, and it was responsible for organising the 2017 Catalan independence referendum and overseeing the subsequent constitutional crisis that it sparked.

[28] Finally on 14 January 2015, Mas announced that he had reached an agreement with ERC to hold a "plebiscitary" election on 27 September—turned into an alternative vote on independence—with parties supporting self-determination including independence as a goal in their manifestos and with the issue of the unitary list still up.

[33][34] As a result, UDC announced that it would hold a vote among its membership following the May 2015 local elections on whether it should keep supporting Mas's independence plan, intending to strengthen its negotiating position and force CDC to slow down its independentist drift.

[54] The agreement, subsequently approved by the leaderships of both parties, provided that the main list for the Barcelona constituency would be led by three independent personalities—former ICV member and MEP Raül Romeva, former ANC president Carme Forcadell and Òmnium chairwoman Muriel Casals—followed by Artur Mas and Oriol Junqueras.

[55][56] Both CDC and ERC agreed that they would distribute politician-reserved posts among themselves at a 60–40 ratio, respectively, with the agreement also providing for Mas to remain the alliance's choice for president, even though he would not be topping the electoral ticket as a result of the power balance achieved by the parties during the negotiations.