pinboarding.rb

require 'pinboard'
require 'json'

pinboard = Pinboard::Client.new token: 'your:api:token'

readability = JSON.parse(File.read('path/to/your/readability/JSON/file'))

readability.each |article| do 
  pinboard.add({
    :url => article['article__url'],
    :description => article['article__title'],
    :extended => article['article__excerpt'],
    :toread => !article['archive'],
    :dt => Time.parse("#{article['date_added']}-04").utc.strftime('%Y-%m-%dT%H:%M:%SZ') # stupid hack, because readability doesn't add the timezone
  })
end