We study worldsheet sphere amplitudes, in the RNS formalism, in superstring theory on \text{AdS}_3\times X with pure NS-NS flux using the near-boundary approximation. By computing a number of amplitudes at low-lying spectral flow, we deduce a candidate for a dual CFT for generic X. Specialising to X={\rm S^3}\times \mathbb{T}^4 and with minimal NS-NS flux, i.e., to the tensionless limit, we explore the effect of the interaction term which we ignore in the near-boundary consideration. We show that amplitudes in the tensionless superstring theory on \rm AdS_3\times S^3\times\mathbb{T}^4 do not receive perturbative contributions from such an interaction term.
