I have an eStore with OpenCart and trying to use the API from [url removed, login to view] but I'm needing a module built so the intigration is seemless.
I'm trying to have their API calculate freight per product zip code. Our website has multiple vendors that ship from multiple locations. The API needs to be able to calculate multiple shipping quotes from different zip codes and total them at check out. Also, if multiple products are being purchase, offer customer a discounted shipping rate if possible.