NASA has launched an API for its data catalog, which was made available to the public in August.
NASA Technology Strategist Sean Herron writes on the open.NASA blog:
"The data.nasa.gov API allows a machine-readable interface to return metadata from the site organized by category, tag, date, or search term. We’re hoping this allows new and creative visualizations of the data resources NASA provides to the public. Additionally, it is a learning experience for us as we work to expand transparency, participation, and collaboration at NASA through new uses of technology."
API documentation can be found at data.nasa.gov/api-info.