Orders and fulfillment
Orders are the central concept within OrderCloud. They are where buyers, sellers, products, addresses, and just about everything else come together to form business transactions. A feature that is somewhat unique to this area of the API is that you'll use the same set of endpoints regardless of whether you're a buyer, seller, or supplier. Buyers add line items to orders by specifying a product, quantity, and (optionally) spec values. Shipping is applied at either the order level or line item level. Shipments are independent of orders; you can ship a partial order, or aggregate items from multiple orders onto a single shipment.