Direttamente da MSDN:
The Windows Live Spaces Photo API allows Web sites to view and update Windows Live Spaces photo albums using the WebDAV protocol. Web sites can incorporate the following functionality:
- Upload or download photos.
- Create, edit, or delete photo albums.
- Request a list of a user's albums, photos, or comments.
- Edit or delete content for an existing entry.
- Query the content in an existing entry.
Al momento l'API è ancora in versione Alpha, ma la documentazione sembra comunque molto completa.