Tests of gauge theories are being constantly raised to higher levels of experimental precision. At the theorical level, one is correspondingly pushed to obtain analytical results for loop calculations to achieve the same. We calculate the complete one-loop off-shell three-point scalar-photon vertex in arbitrary gauge and dimension for scalar quantum electrodynamics. Explicit results are presented for the particular cases of 4 dimension for massless scalars. We also study some of its kinematical limits and compare its numerically. Non perturbative studies of Schwinger-Dyson equations require their infinite, coupled tower to be truncated in order to reduce them to a practically solvable set. In this connection, a physically acceptable ansatz for the three point vertex is the most favorite choice. Scalar quantum electrodynimics provides a simple and neat platform to addess this problem. In massless quenched sQED, we construct the transverse part of the non perturbative scalar-photon vertex.