def _register_endpoints(self, providers):
        """
        See super class satosa.frontends.base.FrontendModule#register_endpoints

        :type providers: list[str]
        :rtype list[(str, ((satosa.context.Context, Any) -> satosa.response.Response, Any))] |
               list[(str, (satosa.context.Context) -> satosa.response.Response)]
        :param providers: A list with backend names
        :return: A list of url and endpoint function pairs
        """
        url_map = []

        for endp_category in self.endpoints:
            for binding, endp in self.endpoints[endp_category].items():
                valid_providers = "|^".join(providers)
                parsed_endp = urlparse(endp)
                url_map.append(("(^%s)/\S+/%s" % (valid_providers, parsed_endp.path),
                                functools.partial(self.handle_authn_request, binding_in=binding)))

        return url_map