NREL Developer Network APIs
The National Renewable Energy Laboratory exposes a developer network of REST APIs covering solar resource (NSRDB, PVWatts), wind resource, alternative fuel stations, utility rates (URDB), transportation, buildings, and geothermal data. Authentication uses an api.data.gov key shared with other federal data programs.
NREL Developer Network APIs is one of 9 APIs that Energy and Utilities publishes on the APIs.io network.
Tagged areas include Renewable Energy, Solar, Wind, Utility Rates, and Alternative Fuel. The published artifact set on APIs.io includes API documentation and an API reference.