Well there's certainly nothing that strictly prevents GETs from having a body other than no guarantee that all client libraries will handle them. I've seen a mi

Well there's certainly nothing that strictly prevents GETs from having a body other than no guarantee that all client libraries will handle them. I've seen a mix that allow it and disallow it. What is common is the libraries that don't support it don't seem to have any indication of this and from what I remember are likely to fail silently. Fairly annoying, so it makes sense why this is basically never used.