I second this recommendation. Restify is targeted at APIs so it has built in support for things like API versioning, auto content negotiation and observability

I second this recommendation. Restify is targeted at APIs so it has built in support for things like API versioning, auto content negotiation and observability (via DTrace). This is not to say that express is bad or that you can't build APIs using express but rather that I find restify more enjoyable to use for APIs.