@asoftdessert @mcc one thing that is funny about content formats is that a lot of them have metadata headers and content bodies, but you can just stuff an entire head+body into another body with its own head, matryoshka style. you can just keep doing this arbitrarily as long as your consumer knows which layers to unwrap and howanyway for http i think http resources having headers plus the HEAD method can work with zero unwrappingif you wanna conneg media type perhaps application/oembed+json?