The eBay Buy Browse API can be used to retrieve items and item details without the need of navigating eBay. GET methods are used for retrievals, and the API uses JSON for responses. The Browse API returns item lists, summaries, detailed item information, and item groups. The eBay Buy Browse and Order APIs allow developers to build eCommerce integrations completely off of eBay. Item retrieval and checkout can be made possible without accessing eBay.