USGovXML is a free Chrome add-on designed to provide users with a thorough index of publicly available web services and XML data sources from the US government. Covering data from all three branches of government, as well as various boards, commissions, corporations, and independent agencies, it serves as a valuable resource for accessing official data. The add-on includes source code snippets, offering practical examples of how to utilize the indexed data sources effectively.

This tool is particularly beneficial for developers and researchers looking to integrate government data into their applications or studies. By organizing a vast array of data sources in one place, USGovXML simplifies the process of finding and using government-provided XML data, making it easier to incorporate public information into various projects.