Which part of logins and cookies is RESTful?<p>Fielding&#x27;s REST requires that the protocol be &quot;stateless&quot;... not that there be no state, but that the client and the server need not keep track of <i>each other</i>.  Cookies, as Fielding explicitly calls out, are in violation of this principle.  Every website that uses cookies is not RESTful.<p>Some people might conclude from this that FB, Amazon, and HN are &quot;not good&quot;, because they&#x27;re not RESTful.  I personally conclude something else, but YMMV.