fullcontact.rb

require 'open-uri'
require 'json'

api_key = '#'
emails = IO.readlines("customers.md")

f = File.open('customers.json', 'w')
list = []
emails.each do |email|
  email.chomp!
  begin
    response = open("http://api.fullcontact.com/v2/person.json?email=#{email}&apiKey=#{api_key}").read
    list << response
  rescue => e
    puts e.message
  end
end
f.write("[#{response.join(', ')}]")
f.close