The hailgun library is a Haskell library that integrates with Mailgun. Mailgun is a service that allows controlled sending of emails. The intial focus of the API is on sending emails rather than recieving them.
This library was implimented based upon the information provided on the Mailgun API Reference. The goal of this library is match this API 1-1.
This library just uses cabal to build itself. To do so for development then follow the following steps:
cabal sandbox init
cabal install --only-dependencies
cabal build
At that point in time you should have a working version of the library. If you wish to see the library in action then you could look at the hailgun-send library.