SAM.gov APIs
System for Award Management (SAM.gov), the U.S. federal procurement and financial assistance system, exposes 11 production APIs catalogued at open.gsa.gov including Entity Management, Exclusions, Federal Hierarchy (Public and FOUO variants), Contract Opportunities (Get Opportunities Public, Opportunity Management), Contract Awards, Product Service Codes, Public Location Services, Assistance Listings Public, Subaward Reporting (Acquisition and Assistance), and Entity/Exclusions Extracts Download. Auth via api.data.gov key.