Something similar has been standardized as well with the JSON API specification (although it adds its own weight to the message as well, it does address this problem): <a href="http:&#x2F;&#x2F;jsonapi.org&#x2F;format&#x2F;#document-compound-documents" rel="nofollow">http:&#x2F;&#x2F;jsonapi.org&#x2F;format&#x2F;#document-compound-documents</a>