The Government & Public Sector industry on APIs.io covers federal agencies, state and local government, open-data portals, regulatory bodies, courts, public safety, and civic-tech platforms that connect citizens to public services. It is one of the largest industries on the network: 384 providers and 1,043 APIs. That scale is the point. Government is not a category, it is an entire economy of machine-readable public data.
Functional bands
The catalog sorts naturally into what these APIs actually do.
| Band | Real providers |
|---|---|
| Statistics & economy | FRED, US Census Bureau, Bureau of Labor Statistics |
| Health & science | openFDA, NASA, Weather.gov, NOAA |
| Legislation & regulation | Congress.gov API, Regulations.gov |
| Citizen services | GOV.UK Notify, USPS, Login.gov |
| Tax & compliance | HMRC UK Tax Authority |
Every one of those providers has a live profile on the network, and most publish more than one API. The EPA alone carries 31 APIs across air quality, water, hazardous waste, and facility compliance.
What’s shifted recently
Three patterns stand out reading across the current entries.
First, identity is centralizing. Login.gov exposes single sign-on and identity verification as a shared service other agencies federate against, rather than every agency rolling its own. That is a structural change in how citizens authenticate to government.
Second, statistical agencies are treating APIs as the primary distribution channel. FRED publishes programmatic access to more than 800,000 economic time series, and the Census Bureau, BLS, and FRED increasingly assume you arrive by API, not by downloading a spreadsheet.
Third, notification and payment are becoming platforms. GOV.UK Notify sends emails, texts, and letters on behalf of government services, and its sibling GOV.UK Pay handles card payments for over 1,500 public sector organisations. The UK model of shared, reusable government platforms is visible right in the catalog.
Where to start
If you are building against public data, start at the Government & Public Sector industry page. It ranks providers by a composite score, so you can see at a glance which agencies have complete, documented, agent-ready surfaces and which are still thin. Weather.gov, Congress.gov, and FRED are good first stops because their data is public, unauthenticated or lightly keyed, and immediately useful.
Takeaway
Government is the deepest open-data industry on APIs.io, and it rewards browsing by function rather than by agency name. The 384 providers behind these 1,043 APIs are uneven in quality, which is exactly why a scored, searchable index beats hunting agency by agency. Find the data you need, check its band, and build.