The eBay Buy APIs (Marketing, Feed, Browse, and Order), along with the Commerce Taxonomy API, provide the capabilities you need to create an eBay shopping experience in your app or website These APIs let your users find and buy items listed on eBay, let you track orders These are RESTful APIs that use OAuth authentication, JSON payloads, and eBay HTTP headers.
You can use the eBay Buy APIs to build an application that displays eBay items, lets shoppers purchase their items, and lets you obtain details about specific purchase orders and provide legacy Ids that enable you to use the Post Order API for returns and cancellations. See Post order tasks for details.
Shoppers can be guests or eBay members. With guest shoppers, the buyer is anonymous and you must provide all their information. With eBay members, the buyer is signed into eBay.
Several Buy API calls require the category ID. You can use the Taxonomy API to find the category for a call, to narrow the result set to categories in buyers' areas of interest, and minimize the number of unwanted items. For more information, see Getting categories for Buy APIs.
Important! The eBay Buy APIs are available as a public beta release. Accordingly, there may be some limitations and conditions on their use. For more information, refer to API launch stages in the Using eBay RESTful APIs guide.