Marketpress Stripe gateway

https://premium.wpmudev.org/blog/marketpress-now-supports-stripe-a-killer-new-payment-gateway/

I found this article about using Stripe with Marketpress. I've tried to connect my Marketpress site with my Stripe account but it only works in Test mode. I have not found this mentioned elsewhere: do I need to have a SSL certificate to enable Marketpress checkout using Stripe? My web design clients needs to launch right away and I'm stuck. Here is the site I am working on: http://helenhiebertstudio.com/products/