PixLab offers a set of APIs that hopes to meet most of your media analysis and processing needs. Whether it's media storage, machine vision, or image processing you need; there is not much on the media analysis/editing market today that PixLab doesn't offer through RESTful APIs.
NASA has released a new API (the EPIC API) which provides programmatic access to images pulled from the EPIC camera. EPIC sits upon the DSCOVR satellite and constantly provides images from the Earth's sunlit side. Developers can retrieve images from the camera along with associated metadata.