Developing micro-services using Clojure, with REST+JSON – Piotr Jagielski (pjagielski.pl)

Piotr's article is a brief tutorial and includes sample code.

Here's another article about micro-services with Clojure at SoundCloud, with much more depth and industrial scale, by Joseph Wilk:

http://blog.josephwilk.net/clojure/building-clojure-services...