  In this work we study the meson vertex $D_sDK^*$ using the QCD sum rules. We
compute the three point correlation functions for the three cases of different
off-shell mesons. The form factors for each case are fitted to the numerical
calculation of the correlation functions and the coupling constant of the
vertex is obtained by comparing the form factors at their respective off-shell
meson pole.
  The result obtained for the coupling constant is $g_{D_sDK^*} =
2.29^{+0.65}_{-0.41}$.
