Could you point me at an example of an idiomatic, non-trivial Go REST/JSON API server? I've been trying for a while to find something to read to get a better h

Could you point me at an example of an idiomatic, non-trivial Go REST/JSON API server? I've been trying for a while to find something to read to get a better handle on good patterns and idiomatic Go, but I haven't really come up with anything. I've found some very good examples of much lower-level type stuff, but I think I have a decent handle on that type of Go already. What I really would like is a good example of how people are using the higher level parts of the standard library, particularly net/http etc.