This user guide is to instruct developers and researchers on how to use the Census Data Application Programming Interface (API) to request data from U.S. Census Bureau datasets.

This guide is to provide an overview of the U.S. Census Bureau’s microdata application programming interface (API) and walk through how to make queries. Through this guide, you will learn what the microdata API is, when to use it, and how to use it to get raw data and custom statistics.

The Census Data API Discovery Tool provides a machine-readable dataset discovery service.