USA SPENDINGusa-spending.com
Official Documentation & Transparency
Last Updated: August 13, 2026

Official Data Sources

Complete transparency on government APIs, Treasury datasets, and public data streams.

Independent Project Notice:

USA Spending is an independent project and is not affiliated with, operated by, sponsored by, or endorsed by the U.S. Government, USAspending.gov, the U.S. Department of the Treasury, or any government agency.

1. Primary Source — USAspending.gov

Official Government Source

USAspending.gov is the official open data portal for U.S. federal spending information, established pursuant to the Federal Funding Accountability and Transparency Act (FFATA) and the DATA Act.

API Base Endpoint: https://api.usaspending.gov

USA Spending consumes official REST API feeds (`/api/v2/spending/by_category/`, `/api/v2/awards/`, `/api/v2/search/spending_by_award/`) to ingest verified prime contracts, grants, direct loans, and agency outlays.

Visit USAspending.gov Official Website

2. U.S. Treasury Fiscal Data

For historical national debt and monthly Treasury statement context, the platform utilizes public data API streams from:

API Base Endpoint: https://api.fiscaldata.treasury.gov

Used for official federal deficit totals, national debt aggregates, and fiscal year revenue totals.

Visit Fiscal Data Treasury Official Website

3. Source-by-Data-Type Table

Data CategoryOfficial SourcePurpose & Application
Federal Outlays & CategoriesUSAspending.gov APICategory spending & Donut Chart breakdowns
Federal Agency OutlaysUSAspending.gov APIDepartment & Agency Explorer profiles
State Geographic AllocationsUSAspending.gov API50-State Explorer & U.S. Map
Prime Recipient AwardsUSAspending.gov APIRecipient contracts, grants & awards profiles
Population BaselinesU.S. Census BureauPer-capita spending calculations

4. Source Attribution & Links

Every major visualization card and detail view on USA Spending includes explicit source badges, metric type labels, fiscal year references, and data freshness timestamps.

5. Data Freshness & Pipeline Policy

Federal reporting feeds are updated periodically. In the event of upstream API rate limits or maintenance, cached validated datasets ensure site availability without sacrificing accuracy.

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