O hai, I HTTParty'd ur web service. No offence, RBrainz gem.

This gem currently only supports the lookup, browse and search GET requests.

Returns Mashes of the metadata tag from MusicBrainz's XML responses.

gem install musicbrainz-ruby

or in a Gemfile

gem 'musicbrainz-ruby', :require => 'musicbrainz'

require 'musicbrainz'
brainz = MusicBrainz::Client.new(:username => 'username',
                                 :password => 'password')

# Find an artist by id, include artist relations
brainz.artist(:mbid => '45d15468-2918-4da4-870b-d6b880504f77', :inc => 'artist-rels')
# Search for artists with the query 'Diplo'
brainz.artist(:query => 'Diplo')

(c) Robin Tweedie 2011

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