From their site: The API allows access to the data to the Federal contracts and Federal assistance databases. All data present on USAspending.gov is available through the API, except for pie charts and end-of-search totals. The site is a re-launch of www.federalspending.gov.
Click the "Track this API" button on any profile page and never miss an API update, new app, or breaking news for that API again.
There are no mashups, developers or code associated with this API yet.
Use FedSpending.org instead.
USASpending.gov contains the same information as FedSpending.org, but warns you that you have NO expectation of privacy and that you may be prosecuted for unauthorized activity.
You can read my full review at my website: http://www.dotgovwatch.com/?/archives/25-You-Will-Be-Watched-on-USASpending.govMaybe-Even-Prosecuted.html