We'll soon require all requests to include a valid [User Agent

header](http://en.wikipedia.org/wiki/User_agent). Setting a

uniq value for this header helps us identify requests and get in touch with

unique value for this header helps us identify requests and get in touch with

developers who are abusing the API. Most HTTP libraries, wrapper libraries, and

even cURL provide a valid header for you already and allow you to change it to

something unique to your application.