MediaSock API

From their site: A lightweight service for handling a user's personal media assets, such as photos. Users with a MediaSock compatible client application simply enter a server domain and the client discovers the available methods without the need for the user to select from a confusing list of APIs or URLs. MediaSock draws on the workings of existing private APIs and related public APIs in use by web-service providers, and it is intended to work alongside the methods provided by them. It is not a wide-ranging specification but a guideline for minimum interoperability, with ease of implementation by services and ease of use for consumers.