2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/230696We find the boundary action for Euclidean AdS2 D-branes in H3+. This action is consistent with the D-branes' symmetries and with the H3+-Liouville relation for disc correlators. It can be used for performing free-field calculations in the H3+ model with boundaries. We explicitly perform the Coulomb-like integrals which appear in the free-field calculation of the bulk one-point function, and find agreement with previously known conformal bootstrap results.10 pages, v2: added a clarification on gluing conditions and symmetriesHigh Energy Physics - Theorytext