Resources.data.gov has replaced Project Open Data.

On January 14, 2019, the Foundations for Evidence-Based Policymaking Act ("Evidence Act"), which includes the OPEN Government Data Act, was signed into law. The Evidence Act requires the Office of Management and Budget, the Office of Government Information Services, and the General Services Administration to develop and maintain an online repository (Resources.data.gov) of tools, best practices, and schema standards to facilitate the adoption of open data practices across the Federal Government.

Archived content of Project Open Data can be accessed at its GitHub repository. You can report missing content or provide any additional feedback via GitHub or by emailing datagov@gsa.gov.

API Sandbox

By providing rich and interactive documentation which also includes the ability for developers to explore and execute live calls against the API, use of API sandboxes can allow API producers to strongly enhance functionality and ease-of-use for potential developers. This speeds early adoption and rewards users with a more fluid experience. Greater adoption then results in a higher return on investment, a more vibrant developer community and greater momentum for the API program.

Two free, open source options include: