Klout 
Ruby wrapper for the Klout REST API
Installation
Klout is available through Rubygems and can be installed via:
gem install klout-rb
Usage
Configure API key
Klout::Client.configure do |config|
config.api_key = "<YOUR_API_KEY>"
end
Get users klout score
Klout::Client.score("ladygaga", "davidguetta").map do |user|
"#{user.twitter_screen_name}: #{user.kscore}"
end
Get users klout profile
Klout::Client.score("ladygaga", "davidguetta").map do |user|
"#{user.twitter_screen_name}: #{user.score.true_reach}"
end
Get users topics
Klout::Client.topics("ladygaga", "davidguetta").map do |user|
"#{user.twitter_screen_name}: #{user.topics.join(',')}"
end
Get users influencers
Klout::Client.influenced_by("ladygaga", "davidguetta").map do |user|
"#{user.twitter_screen_name}: #{user.influencers.map { |i| i.twitter_screen_name }.join(',')}"
end
Get users influencees
Klout::Client.influencer_of("ladygaga", "davidguetta").map do |user|
"#{user.twitter_screen_name}: #{user.influencees.map { |i| i.twitter_screen_name }.join(',')}"
end
Performance
Klout-rb uses multi_json for parsing JSON responses and HTTPI for making HTTP requests.
You can use yajl and httpclient for better performance.