Facebook is starting to approve additional "actions," verbs that let users go beyond Like. Developers can use Facebook timeline actions via the Facebook Graph API, but only if approved by the social network. Social shopping platform AddShoppers received approval for "want" and "own" and even has some Like-like buttons for those actions.
Amazon has announced a new API that is intended to serve as a next-generation resource in the advancement of everything previously handled by the Amazon Marketplace Web Service (MWS) API. The new Amazon Selling Partner API (SP-API) will provide key improvements to the previous experience.