API Documentation Use the Source Orders API to access, create, and update orders. ResourcesAuthenticationCreate a new API key using your temporary authorization key.ItemsLearn about the items model and how to create, retrieve, update, and remove items.MerchantsLearn about the merchant model and how to retrieve your merchant object.OrdersLearn about the orders model and how to create, retrieve, update, and cancel orders.ProductsLearn about the product model and how to retrieve product objects.