Error Paysimple payment gateway integration

I am using gem 'paysimple-ruby' and require 'paysimple.rb' file in which using require 'paysimple' Paysimple.api_user = '' Paysimple.api_key = ' and when i am hitting customer = Paysimple::Customer.create({ first_name: 'John', last_name: 'Doe' }) this from console them getting given below error:

Digest::Digest is deprecated; use Digest Paysimple::APIError: (Status 403) Invalid response object from API: "\n \n \n \n \n\nAttention Required! | CloudFlare\n\n\n\n\n\n\n\nbody{margin:0;padding:0}\n</script>\n\n\n\n\n\n\n \n Please enable cookies.\n \n \n One more step\n Please complete the security check to access api.paysimple.com\n \n\n \n \n \n \n \n \n \n \n \n \n \n http://ift.tt/1tkGX6O\" frameborder=\"0\" scrolling=\"no\" style=\"width: 302px; height:422px; border-style: none;\">\n \n \n \n \n \n \n \n\n\n \n \n\n \n \n \n \n \n \n \n \n \n \n\n \n \n \n Why do I have to complete a CAPTCHA?\n\n Completing the CAPTCHA proves you are a human and gives you temporary access to the web property.

\n \n\n \n What can I do to prevent this in the future?\n\n If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware.\n\n If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices.\n \n \n \n\n \n

\n CloudFlare Ray ID: 2b056270d6642dc1\n •\n Your IP: 203.92.32.27\n •\n Performance & security by CloudFlare\n \n

\n\n\n\n \n \n\n \n window._cf_translation = {};\n \n \n\n\n\n\n" (HTTP response code was 403) from /home/http://ift.tt/1tdKfrS rescue in handle_api_error' from /home/http://ift.tt/1tkGQbrhandle_api_error' from /home/http://ift.tt/1tdKnri rescue in request' from /home/http://ift.tt/1tkGP7orequest' from /home/http://ift.tt/1tdKtzb create' from (irb):5 from /home/http://ift.tt/1tkGYI0start' from /home/http://ift.tt/1tdJO0B start' from /home/http://ift.tt/1tkGMbJconsole' from /home/http://ift.tt/1tdKlzI run_command!' from /home/http://ift.tt/1tkGsJZ' from bin/rails:4:in require' from bin/rails:4:in'