It sounds a bit like the no-cors request that lets you see if the resource was available but won't let you see anything? I nearly tried to use it once to try a

It sounds a bit like the no-cors request that lets you see if the resource was available but won't let you see anything? I nearly tried to use it once to try and see if a react app was on an intranet or not, but the client decided they didn't want it.