U.S. Census Bureau requires API key for all Census Data API requests; approved email domains needed to activate

May 11, 2026

The U.S. Census Bureau said it now requires an API key for every Census Data API query, detailed how to request and activate a key, listed allowed email domains (.com, .net, .org, .gov, .edu), and provided troubleshooting steps and contact instructions.

The full story

An agency official for the U.S. Census Bureau announced that the bureau now requires an API key for all queries to the Census Data API and urged data users to register for a key before making requests. The official said the key is a security measure intended to protect both the bureau and data users and that each key is a unique alphanumeric string tied to an email address.

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