In short - you cant. Unless you're a programmer. The API contains calls that can be used to build shopping cart modules. It is not a module for every shopping cart/ecommerce platform on the market.
We decided to remove them so we didnt have to maintain them - the API is standard enough that any HTTP client library/JSON parser can deal with it no problem.
Fastway imposes a 100 call a day limit on API calls. To increase this restriction, please contact our support (Contact page) and provide the company name and email address you used to sign up as a Fastway Customer.
For customers who wish to integrate with Fastway to consign electronically and print labels, you'll need to have access to our FastLabel API.
To request for a FastLabel API access, you must be a FastLabel customer. If you're already a FastLabel customer and require access the FastLabel API, please contact our support (Contact page) with your company name and email address you used to sign up as a Fastway Customer.
If you're not a FastLabel customer, you'll need to speak to your local depot about using FastLabel.