Government APIs expose public records, legislation, elections, census data, and procurement feeds — most completely free since they're taxpayer-funded open data. Expect generous rate limits but occasionally dated documentation or HTTP-only endpoints. These sources are excellent for civic tech, journalism, research, and any product that benefits from authoritative public data.
| API | Pricing | Auth | CORS | Health | |
|---|---|---|---|---|---|
| AI Law Tracker API AI regulation laws by jurisdiction (US, EU, global) as read-only JSON; free tier | Free | API Key | Unknown | Profile | |
| Api Colombia Community driven API for Colombia Public Data | Free | No | Yes | Profile | |
| Bank Negara Malaysia Open Data Malaysia Central Bank Open Data | Free | No | No | Profile | |
| Brazil Community driven API for Brazil Public Data | Free | No | Yes | Profile | |
| Brazil Central Bank Open Data Brazil Central Bank Open Data | Free | No | No | Profile | |
| Brazil Receita WS Consult companies by CNPJ for Brazilian companies | Free | No | No | Profile | |
| Bureau of Labor Statistics API Bureau of Labor Statistics API: employment, inflation (CPI), wages, productivity, and economic indicators data. | Free | Unknown | Yes | Profile | |
| CPFHub API Brazilian CPF lookup — returns full name, birth date, and gender for any CPF | Paid | API Key | Yes | Profile | |
| Census.gov The US Census Bureau provides various APIs and data sets on demographics and businesses | Free | No | No | Profile | |
| City, Berlin Berlin(DE) City Open Data | Free | No | No | Profile | |
| City, Gdańsk Gdańsk (PL) City Open Data | Free | No | Yes | Profile | |
| City, Gdynia Gdynia (PL) City Open Data | Free | No | No | Profile | |
| City, Helsinki Helsinki(FI) City Open Data | Free | No | No | Profile | |
| City, Lviv Lviv(UA) City Open Data | Free | No | No | Profile | |
| City, Nantes Open Data Nantes(FR) City Open Data | Free | API Key | No | Profile | |
| City, New York Open Data New York (US) City Open Data | Free | No | No | Profile | |
| City, Prague Open Data API Prague(CZ) City Open Data | Paid | Unknown | Unknown | Profile | |
| City, Toronto Open Data Toronto (CA) City Open Data | Free | No | No | Profile | |
| Code.gov The primary platform for Open Source and code sharing for the U.S. Federal Government | Free | API Key | No | Profile | |
| Colorado Information Marketplace Colorado State Government Open Data | Free | No | Unknown | Profile | |
| Conversor IAE CNAE API Spanish IAE/CNAE tax activity codes, 2009→2025 crosswalk and AEAT obligations | Unknown | API Key | No | Profile | |
| Data USA US Public Data | Free | No | Yes | Profile | |
| Data.gov US Government Data | Free | API Key | No | Profile | |
| Data.parliament.uk Contains live datasets including information about petitions, bills, MP votes, attendance and more | Free | No | No | Profile | |
| Dedline.io API Data for US state voter registration deadlines and details, for primaries and general elections | Free | No | No | Profile | |
| Deutscher Bundestag DIP This API provides read access to DIP entities (e.g. activities, persons, printed material) | Free | API Key | No | Profile | |
| Disclosed Capitol API US congressional & executive-branch stock trade disclosures (STOCK Act + OGE) | Paid | API Key | No | Profile | |
| District of Columbia Open Data Contains D.C. government public datasets, including crime, GIS, financial data, and so on | Free | No | No | Profile | |
| EPA Web services and data sets from the US Environmental Protection Agency | Free | No | No | Profile | |
| FBI Wanted Access information on the FBI Wanted program | Free | No | No | Profile | |
| FEC Information on campaign donations in federal elections | Free | API Key | Yes | Profile | |
| Federal Register The Daily Journal of the United States Government | Free | No | No | Profile | |
| Gazette Data, UK UK official public record API | Free | OAuth | No | Profile | |
| IBGE Aggregate services of IBGE (Brazilian Institute of Geography and Statistics) | Free | No | Yes | Profile | |
| Interpol Red Notices Access and search Interpol Red Notices | Free | No | Yes | Profile | |
| Istanbul (İBB) Open Data Data sets from the İstanbul Metropolitan Municipality (İBB) | Free | No | No | Profile | |
| National Park Service, US Data from the US National Park Service | Free | API Key | Yes | Profile | |
| Open Government, ACT Australian Capital Territory Open Data | Free | No | No | Profile | |
| Open Government, Argentina Argentina Government Open Data | Free | No | No | Profile | |
| Open Government, Australia Australian Government Open Data | Free | No | No | Profile | |
| Open Government, Austria Austria Government Open Data | Free | No | Yes | Profile | |
| Open Government, Belgium Belgium Government Open Data | Free | No | No | Profile | |
| Open Government, Canada Canadian Government Open Data | Free | No | No | Profile | |
| Open Government, Colombia Colombia Government Open Data | Free | No | Yes | Profile | |
| Open Government, Cyprus Cyprus Government Open Data | Free | No | No | Profile | |
| Open Government, Czech Republic Czech Republic Government Open Data | Free | No | Yes | Profile | |
| Open Government, Denmark Denmark Government Open Data | Free | No | Yes | Profile | |
| Open Government, Estonia Estonia Government Open Data | Free | API Key | No | Profile | |
| Open Government, Finland Finland Government Open Data | Free | No | No | Profile | |
| Open Government, France French Government Open Data | Free | API Key | Yes | Profile | |
| Open Government, Germany Germany Government Open Data | Free | No | No | Profile | |
| Open Government, Greece Greece Government Open Data | Free | OAuth | No | Profile | |
| Open Government, India Indian Government Open Data | Free | API Key | No | Profile | |
| Open Government, Ireland Ireland Government Open Data | Free | No | Yes | Profile | |
| Open Government, Italy Italy Government Open Data | Free | No | No | Profile | |
| Open Government, Kazakhstan Kazakhstan Government Open Data | Free | No | No | Profile | |
| Open Government, Korea Korea Government Open Data | Free | API Key | No | Profile | |
| Open Government, Lithuania Lithuania Government Open Data | Free | No | No | Profile | |
| Open Government, Luxembourg Luxembourgish Government Open Data | Free | API Key | No | Profile | |
| Open Government, Malaysia Malaysia Government Open Data | Free | No | Yes | Profile | |
| Open Government, Mexico Mexican Statistical Government Open Data | Free | No | No | Profile | |
| Open Government, Mexico Mexico Government Open Data | Free | No | No | Profile | |
| Open Government, Netherlands Netherlands Government Open Data | Free | No | No | Profile | |
| Open Government, New South Wales New South Wales Government Open Data | Free | API Key | Yes | Profile | |
| Open Government, New Zealand New Zealand Government Open Data | Free | No | No | Profile | |
| Open Government, Norway Norwegian Government Open Data | Free | No | No | Profile | |
| Open Government, Poland Poland Government Open Data | Free | No | No | Profile | |
| Open Government, Portugal Portugal Government Open Data | Free | API Key | Unknown | Profile | |
| Open Government, Queensland Government Queensland Government Open Data | Free | No | No | Profile | |
| Open Government, Romania Romania Government Open Data | Free | No | Yes | Profile | |
| Open Government, Saudi Arabia Saudi Arabia Government Open Data | Free | No | Unknown | Profile | |
| Open Government, Singapore Singapore Government Open Data | Free | No | No | Profile | |
| Open Government, Slovakia Slovakia Government Open Data | Free | No | Yes | Profile | |
| Open Government, Slovenia Slovenia Government Open Data | Free | No | No | Profile | |
| Open Government, South Australian Government South Australian Government Open Data | Free | No | Yes | Profile | |
| Open Government, Spain Spain Government Open Data | Free | No | No | Profile | |
| Open Government, Sweden Sweden Government Open Data | Free | No | Yes | Profile | |
| Open Government, Switzerland Switzerland Government Open Data | Free | No | No | Profile | |
| Open Government, Taiwan Taiwan Government Open Data | Free | No | No | Profile | |
| Open Government, Thailand Thailand Government Open Data | Free | API Key | No | Profile | |
| Open Government, UK UK Government Open Data | Free | No | No | Profile | |
| Open Government, USA United States Government Open Data | Free | No | No | Profile | |
| Open Government, Victoria State Government Victoria State Government Open Data | Free | No | Unknown | Profile | |
| Open Government, West Australia West Australia Open Data | Free | No | No | Profile | |
| OpenFDA API OpenFDA API for FDA data: drug labels, adverse events, recalls, foods, devices, and tobacco products with JSON/CSV/XML export. | Free | Unknown | No | Profile | |
| PRC Exam Schedule Unofficial Philippine Professional Regulation Commission's examination schedule | Free | No | Unknown | Profile | |
| Polling Places API This data set contains the list of polling places. It can be organized by ward/division, accessibility rating, or type of building. This list is used to assign poll workers, send the machines and necessary accessibility | Unknown | Unknown | Yes | Profile | |
| REFUGE Restrooms Safe restroom access for transgender, intersex and gender nonconforming people. Locates verified restrooms by location. | Free | No | Yes | Profile | |
| Represent by Open North Find Canadian Government Representatives | Free | No | No | Profile | |
| U.S. EPA Enforcement and Compliance History Online (ECHO) - All Data API Enforcement and Compliance History Online (ECHO) is a tool developed and maintained by EPA's Office of Enforcement and Compliance Assurance for public use. ECHO provides integrated compliance and enforcement information | Unknown | Unknown | Yes | Profile | |
| UK Companies House UK Companies House Data from the UK government | Free | OAuth | No | Profile | |
| US Census Bureau API US Census Bureau API: demographic, economic, housing, and population data from decennial census and American Community Survey. | Free | Unknown | Yes | Profile | |
| USAspending.gov US federal spending data | Free | No | Yes | Profile | |
| USDA FoodData Central API USDA FoodData Central API: comprehensive food composition data, nutrition info, and dietary guidelines. | Free | API Key | Yes | Profile | |
| civicAPI Provides live and historic election results for races across the world | Free | No | Yes | Profile |
Start with pricing and auth: free tiers and no-auth APIs are fastest to prototype with. Then check CORS if your app calls the API from the browser, and health before you commit — a great API that's been down for a week will block your launch. Each profile below shows all of these signals plus rate limits where documented.