SSL must be anabled to use nocaptcha recaptcha on my site

Please confirm if SSL must be anabled to  use nocaptcha recaptcha on my site. Disabling SSL and using http API request (http://bit.ly/1GXzq2b) not working for me. Please reply as soon as possible. I need to use it on multiple sites where SSL is not enabled. Please let me know how can use it without SSL.Regards -- You received this message because you are subscribed to the Google Groups "reCAPTCHA" group. To unsubscribe from this group and stop receiving emails from it, send an email to recaptcha+unsubscribe@googlegroups.com. To post to this group, send email to recaptcha@googlegroups.com. Visit this group at http://bit.ly/1dkFnYd. For more options, visit http://bit.ly/P65DvS.