Integrate BOI with Sage 100 ERP 2018

Hello,
We have an eCommerce web application built-in in Ruby on Rails. And, we need to integrate Sage ERP with our ruby server,
Which will fetch products data from Sage ERP and writes orders data to Sage ERP?

We have installed Sage ERP on our windows server machine. But, we need APIs which will connect our Rails server with Sage ERP System.
I found that BOI will do it. However, I don't find any official document to integrate BOI with Sage 100 ERP.

Can you please guide us. How can we integrate BOI with Sage 100 for REST APIs?

Any help on this will highly be appreciated.

Thanks. Regards