I'm building a server side application that is supposed to receive unspecified kind of objects. Whatever their shape would be the parser will the the incoming input and transform it into a generic object, like what Newtonsoft does when its parsing without specifying the target type. The problem is what serialization protocol use, something already existing will be obliviously better so I don't have to write dozens of new serialization clients. Brief list of non-good protocol:

• JSON: Anything is a string or a number, the client send a DateTime and you receive a string
• Protobuf: Is by design against dynamic types
• BSON: The better that I seen now but doesn't cover all types
• capnproto: covers very few types
• MessagePack: covers very few types