A study was undertaken to determine whether oxygen could be added directly to a fluidized bed of catalyst to provide all of the endothermic heat for the reforming reaction. It is shown that oxygen can be successfully introduced onto a reforming reactor to provide for the endothermic heat of reforming reactions. The methane conversion increased with increasing reactor temperature, oxygen input flow rate and steam-methane ratio and decreased with increasing reactor pressure as expected. Methane conversion and hydrogen yield are compared to those expected at equilibrium. There was 100% conversion of oxygen under all conditions. Most experimental runs reached and maintained autothermal conditions. The hydrogen yield increased with increasing temperature and steam-methane ratio. The hydrogen yield decreased minimally with increasing reactor pressure and oxygen flowrate.