See a "pretty" version of your API. Goggles installs a little tiny Sinatra app on a URL prefix and serves any JSON responses that come back as a prettyprinted HTML page. There are browser add-ons that do a great job with this sort of thing, but I wanted something I could live-link from API docs. This could be a lot fancier and prettier, I just extracted the bare minimum from a production app. Patches welcome.
Gemfile gem 'rack-goggles', '~> 1.1.0'
install gem install rack-goggles