This is the JSON API server example presented by @barelyknown at Boston Ember on July 9, 2015.
An example of the server is running at https://barelyknown-json-api-example.herokuapp.com.
Documentation for the server is available at https://barelyknown-json-api-example.herokuapp.com/docs.
The slides from the talk are available here.
Audio plus slides from the talk are up on YouTube.