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- Checkout Web Service - An API allowing an order to be placed. This is an API geared around customer experience. It is the largest web service UltraCart offers. If you need to create your own checkout pages running on a different server (and the JavaScript API won't meet your needs), this is the web service you should use.
- Item Management Web Service - A simple interface allowing for items and kits to be created, and inventory updated
- Order Management Web Service - A simple interface allowing for orders to be created
- Affiliate Management Web Service - A simple interface allowing for affiliate management
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