hosts a symmetry protected topological (SPT) phase protected by a discrete ℤ2 symmetry. The ground state of the system is twofold degenerate and exhibits local spontaneous symmetry breaking of the ℤ2 symmetry close to the edges of the circuit, leading to spontaneous localized edge supercurrents. The ground states host Majorana zero modes (MZM) at the edges of the circuit. On top of each of the two ground states, the system exhibits localized bound states at both edges, which are topologically protected against small disorder in the bulk. The spectrum of these boundary excitations should be observable in a circuit-QED experiment with feasible parameter choices.