Existing API Users: Update any developer.nrel.gov references in your code to developer.nlr.gov. The previous developer.nrel.gov domain was retired on May 29, 2026.
Learn more about the domain transition.
Building Component Library
Access energy data on individual components or energy conservation measures for buildings. This data can be used to create building energy models.
For web service details, documentation, and access, see the Building Component Library API documentation.
Note: Your developer.nlr.gov API key will not work for the Building Component Library API. Instead, refer to the Building Component Library documentation for access.