I kind of disagree with this article. With go its so easy to get started with http that most of the time you dont even need a framework. If you do, most good frameworks use the following function as a common basis:

  func(http.ResponseWriter, *http.Request)

I started with barebones http, then used gorilla, and later started using negrioni.

Any new library with uses this function helps me.

So in the end: you dont need a framework, but libraries are nice.

Note: My api is a simple json based rest service.