I have recorded a short screencast, demonstrating how easy it is to set up an Erlang application with a HTTP API using Test Driven Development.
If you can’t see the embedded video go to vimeo directly: https://vimeo.com/59832641
Make sure you have a recent version of erlang and rebar installed when trying it yourself.
Get Erlang through your standard package/port system. In this screencast I used R15B01.
Get Rebar from Github and follow the instructions: http://github.com/basho/rebar
You can find the code on Github