Our API directory now includes 316 government APIs. The newest is the Google Civic Information API. The most popular, in terms of mashups, is the Sunlight Labs Congress API. We list 19 Sunlight Labs Congress mashups. Below you’ll find some more stats from the directory, including the entire list of government APIs.


In terms of the technical details, REST and XML lead the way. There are 226 government REST APIs and 81 government SOAP APIs. Our directory lists 235 government XML APIs and 168 government JSON APIs.

The most common tags within government are 35 reference government APIs, 27 data government APIs and 26 politics government APIs.

On the mashup side, we list 80 government mashups. We named PolitickerUSA as mashup of the day in November.
For reference, here is a list of all 316 government APIs.
Aadhaar UIDAI Authentication API: Online authentication for Indian citizens
ActBlue API: Democratic fundraising service
ADL 3D Repository (3DR) API: 3D model database
AES WebLink API: Shipment submission and inquiry services
AIDS.gov Service Provider Locator API: HIV/AIDS testing and care information service
AIDSinfo API: Government info on HIV/AIDS treatment
AIMS Address API: Johnson County Kansas address lookup service
Alameda County Service Provider API: listings for social services in Alameda County (Oakland), CA
API.LEIPZIG API: Leipzig city data
ASC National Registry Search API: Search service for registered real estate appraisers
Australian Business Number Lookup API: Australian business number refernece service
Örebro kommun API: Örebro kommun information
Baltimore Open311 API: Neighborhood public issue reporting tool
BART API: Transit tracking service for San Francisco, California
Berlin Open Data API: Berlin data and information
Biosafety Clearing-House API: Living modified organism information exchange
Brazil CKAN API: Brazil open government data
Brazilian Election Candidates API: Brazilian election candidate information service
Business.gov API: US government small business resources
California ISO API: Utility regulatory information system
California Race and Ethnic Population Projections API: California race and ethnic population projection data
Canada Post API: Canadian postage and mailing service
Canada's Economic Action Plan API: Information of Canadian government EAP
Capitol Words API: Track words used by US government representatives
CENSUS.IRE.ORG API: 2010 census data access service
Centers for Disease Control (CDC) Content Syndication API: Health information content syndication service
Challenge.gov API: Government challenge/solution platform
Chicago Metropulse API: Chicago quality of life data
Chronicling America API: Archive of US newspapers
Cicero API: Address-based Legislative District Matching and Elected Official Lookup Service
City of Boston Citizen's Connect API: Boston residents reporting service
City of Chicago Data Portal API: Chicago datasets
City of Edmonton Open Data Catalogue API: City of Edmonton datasets
City of Nanaimo API: Nanaimo, B.C., datasets
City of New Orleans API: New Orleans city data
City of Rennes API: City of Rennes, France datasets
City of St. Louis API: City of St. Louis data
City of Toronto: 311 API: Toronto city government services
CitySourced API: Mobile civic engagment tool
Civic Commons Marketplace API: Open government data database and sharing platform
Civic Footprint API: Political geography lookup for Illinois
CKAN Czech Republic API: Czech Republic open government data
CKAN Ireland API: Ireland open government data
CKAN Italy API: Italian open government data
CKAN Norway API: Norway open government data
Colorado HBGuest API: Colorado water resources data service
ColoradoWaterSMS API: Colorado surface water resource data service
Data Greater Manchester API: Manchester, England open government data
Data Translation Web Service (DTWS) API: Space physics data service
Data.CookCountyIL.Gov API: Cook County, IL government data
Data.ed.gov API: Education grant data
data.gov.au API: Australia government data
data.gov.sg API: Singapore government data
Data.gov.uk API: Public government database
Data.Illinois.Gov API: Illinois government data
Data.Medicare.Gov API: Medicare information and datasets
data.nasa.gov API: NASA datasets
Data.OK.gov API: Oklahoma state government data
Data.Oregon.Gov API: Oregon state government data
Data.Seattle.Gov API: Seattle City Government data
Data.Washington API: Washington state data
Datadotgc.ca API: Canadian open government data
DataGov.ru API: Russian open government data
Datahotell API: Norway open government data
Datanest Fair-Play Alliance API: Slovakia government data
DataWeave API: Aggregated public data
DC Location Verifier API: DC place finder and address verification service
DEA Number API: U.S. DEA controlled substance validation service
Democracy In Action API: eAdvocacy services for nonprofits
deutschland API: German elected officials information service
DevLeap Codice Fiscale API: Italian citizen tax ID reference service
DirectGov syndication service API: UK government content syndication service
DRCOG API: Denver area spatial data
Drumbone API: US political data aggregated from multiple sources
Dublin City Community Maps API: Dublin amenities location service
Earth Observing System API: Earth observation data clearinghouse
eLobbyist LegiScan API: U.S. national and local legislation tracking service
Empire 2.0 Tech Talk API: Government technology discussion platform
EnergyStar ABS API: Energy management and conservation service
EnergyStar Third-Party Certification API: Energy efficiency certification processing service
EPA Envirofacts API: Environmental database
EPA Project Catalog API: EPA project information service
EPA Station API: Find EPA monitoring stations by geographic area
EPA Station Catalog API: EPA monitoring station information service
EPA Watershed Summary API: EPA watershed information service
ERS/USDA Per Capita Food Availability Data API: Food availability data
European Union Legislation API: European Union legislative data service
Exchange Network NAAS API: Authentication for the Environmental Information Exchange Network
Excluded Parties List System API: List of entities ineligible for Federal contracts
FAA Obstruction Evaluation API: Aviation obstruction information service
FCC API: U.S. Communications Data Service
FCC Form 499 Filer Database API: Common carrier reporting information service
FedBizOpps API: U.S. government procurement and purchasing service
Federal Infrastructure Projects API: Federal project dashboard
Federal Procurement Data System API: U.S. government purchasing and procurement information service
FederalRegister.gov API: Open source government data
FedSpending.org API: Database of US government spending
Find Your MP- UK Parliament API: UK MP search tool
Florida DHSMV API: Florida motor vehicle testing outsourcing service
Follow The Money API: Database of US campaign contributions
FRED API: US Federal Reserve Economic data
FreedomSpeaks API: United States political data lookup
FSRS FFATA Reporting API: U.S. government contractor reporting service
GeoCommunicator API: BLM public lands mapping and data service
GeoGratis API: Geographic data and mapping service
Gipuzkoa API: Spanish province government data
Glocal Focal US Mortality Data API: US government mortality data
Google Civic Information API: Civic information service
GOP.gov API: US Congressional Republicans data
Goslyudi.ru API: Public ratings of Russian government bloggers
GovHG Data.One API: Hong Kong real-time traffic
GovTrack.us API: US Congress database service
GovTracker API: Rhode Island state data services
Granicus Open Platform API: Government open data service
Granicus Search API: Government agency search service
Granicus Training Management Suite API: Government employee training service
Guardian Politics API: UK government and political resources
Health Indicators Warehouse API: Health indicators database
HealthData.gov API: Health data service
HealthData.gov catalog API: Medical datasets catalog service
Healthfinder.gov API: Government health agency information
Helsinki City Service Map API: City services maps
Helsinkikanava Open Data API: Helsinki city council meeting information and recordings
HM Revenue & Customs API: UK tax document submission service
Home Energy Saver API: Energy calculator tool
How'd They Vote? API: Canadian Parliament voting records
HUD iMAX API: Tenant and voucher data transmission service
Idescat Catalan and Spanish Indicators API: Economic indicator service
Idescat Municipality in Figures API: Statistical information on Catalan municipalities
ikregeer.nl API: Dutch parliament documents
Income Tax India e-Filing API: India Income Tax e-Filing service
Influence Explorer Text API: Textual analysis tool
Inside Idaho API: State geospatial information service
Institute of Development Studies API: Research and data repository
International Aid Transparency Initiative API: Aid spending index
Israel Ministry of Finance Taarif API: Israeli tariff reference service
ITIS Web Service Description API: Species taxonomy data
IUID Registry API: U.S. Department of Defense procurement information service
Kenya Open Data API: Kenya datasets
King County Open Data API: King County, WA datasets
la Lotería del Niño API: Spanish Lottery Information Lookup
Larimer County Public Records Databases API: Larimer County property and property tax information service
legislation.gov.uk API: UK legislation information service
Library of Congress Subject Headings API: Access to the Library of Congress Subject Headings
LittleSis API: Database for tracking political and business relationships
London DataStore API: London government data
LOUIS API: US federal documents database
ManageMyRequests API: Information request tracking and reporting service
MapLight API: Government database linking contributions and votes
MAPLight.org Bill Positions API: Campaign donation and vote tracking service
Met Office WOW API: UK weather observations
Metro Trip Planner API: Los Angeles Metro transit information
Minnesota CTU dataset API: Minnesota mapping database
Mobile Commons Legislative Lookup API: Legislative representative information service
MyBikeLane API: Read-Only API for MyBikeLane and UncivilServants Database
NAIC Registry API: Insurance regulation compliance services
NAIC SERFF API: Insurance regulation compliance services
Nantes open data API: Nantes, France city data
NASA Coordinated Data Analysis System (CDAS) API: Space physics instrument data
National Broadband Map API: US broadband information
National Drug File-Reference Terminology API: Clinical information about medications
National Weather Service NDFD API: U.S. national digital weather forecast service
NCEP North American Mesoscale API: Weather data retrieval and forecasting service
Nephics European VAT Number Validation API: EU VAT information exchange system
New Dawn ACM API: Case managment software
New Dawn JustWare API: Criminal justice agency and court information service
New York Times Campaign Finance API: U.S. campaign finance data
New York Times Congress API: US Congress historical data
New York Times Districts API: Political districts service
New York Times NY State Legislature API: NY State legislative member information
NHS API: UK National Health Service
NIST CDA Guideline Validation API: CDA guideline validation service
NOAA MADIS API: Meteorological data observations
NOAA National Weather Service (NWS) API: Weather forecast database
Nos Données (Our Data) API: Government data
NWQMC Water Quality Portal API: Water quality data service
NY Senate API: New York state Senate data access
NYC 311 Online API: New York City Government data
NYC Open Data API: New York City data collection
Oahu Transit Services API: Real time transit data service
Oakland Crime Reports API: crime reports service
Oakland Crimespotting API: Oakland, Calif., crime information service
OFAC Analyzer API: Financial legal compliance service
OffeneDaten API: Germany open government data
Office for National Statistics API: UK neighborhood and census data
Open Data Badalona API: Badalona city data services
Open Data Catalogue Austria API: Austria open data
Open Data Euskadi API: Basque Country government data
Open Data gencat API: Catalonia government data
Open Dems Polling Place API: Polling place location service
Open Dems Voter Registration API: Voter registration service
Open Energy Information API: Energy resource data services
Open Government Data Initiative API: Government data resource from Microsoft
Open Kent API: Kent, England county data
Open North Represent API: Database and API for Canadian elected officials
Open Patent Services API: European Patent Office web services
Open State Project API: Provides State Legislative Information
Open States API: State legislative information
Open Stockholm API: Stockholm city data
Open311 API: Neighborhood public issue-tracking service
OpenAustralia API: Australian government information service
OpenBaltimore API: Baltimore City data
OpenColorado API: Colorado Open Data Catalog
OpenCongress API: US government data
OpenDataPhilly API: City of Philadelphia data
opengov.es API: Spain open government data
opengov.fi API: Finland open government data
OpenGovernment API: State and local government data
Openly Local API: Government information tracking service
openparliament.ca API: Canadian Parliament Hansards
OpenSecrets API: U.S. political data lookup
Oregon Education API: Educational assessment data service
PDX API: Portland geographic and real-time information
PDX CitySync API: PDX Public Data Service
PDXCouncilConnect API: Portland (Oregon) City Council voting service
Point-In-Polygon Census Intersection API: U.S. Census data mapping service
Poligraft API: Political Entity Extraction Service
Postcode Anywhere Government Data API: UK government data service
Project Vote Smart API: U.S. political data lookup
PublicData.eu API: European government open data aggregator
Purolator eShip API: Shipping and e-commerce delivery service
RealSearch TIN Reverse API: Tax ID verficiation service
Recovery.gov API: Recovery Act 2009 data
Recreation.gov API: Federal recreation database
Redbridge DataShare API: UK government data
RegistryCompliance Scrub API: Registry Compliance Service
Regulations.gov API: U.S. government regulations document repository
ReportIt API: UK government trouble report service
Research.gov Application Submission API: Grant application submission service
RestFul Web Services UNSPSC API: eCommerce product classification code reference
RI.gov Open Data API: Rhode Island government information
Richmond Sunlight API: Virginia general assembly information aggregator
Rijksoverheid CSO API: Dutch government job recruiting service
SaferBus API: Transportation Safety Information Service
SAMHSA API: Substance abuse and mental health services
San Francisco Crimespotting API: Crimespotting data for San Francisco California
San Francisco Ethics Commission Lobbyist API: San Francisco lobbyist information database
San Francisco Open311 API: Neighborhood public issue reporting tool
Sao Paolo Open Government API: Sao Paolo state government portal
Satellite Situation Center Web (SSCWeb) API: Spacecraft location mapping
SBA Business Licenses and Permits API: Business licenses and permits search service
SBA City and County Data API: U.S. City and County data service
SBA Loans and Grants Search API: Loans and grants search service
SBA Recommended Sites API: Link recommendation service
Science.gov API: Science information service
ScienceBase API: Geological science data catalog
SeeClickFix API: Share non-emergency problems in your neighborhood
Shropshire Council API: UK government portal
Socrata Open Data API: Online data sharing service
SSA CBSV API: Social security number validation service
SSN Validator API: Social security number validation service
St. Louis FRED API: Economic research data service
StreetLightOutages API: Street light maintenance information service
StrikeIron Super Data Pack API: APIs for variety of reference data sources
Sunlight Foundation's Party Time! API: Political fundraiser invitation database
Sunlight Labs Congress API: US Congress database service
Sunlight Labs Real-time Congress API: Near Real-Time Information on the Current Congress Session
Suomi.fi API: Finland government services portal
Systembolaget System API: Systembolaget Alcohol Database Access
Tariff Analysis Project API: Official utility tariff data service
Tell Them What You Think API: UK government consultations database
The Finder Sales Tax API: Ohio sales tax data service
The Old Bailey API: UK criminal court record search service
TheyWorkForYou API: Track the UK Parliament
Toronto Budget Data API: City of Toronto budget data service
Transparency Data API: State and Federal campaign contribution data
Transport for London API: UK transportation service
TriMet API: Transit tracking service for Portland, Oregon
U.K National Grid Energy Flow API: Energy consumption and supply information service
U.S. Department of Labor API: Government open data service
UK BIS API: UK government business support sector
UK Civil Service API: UK public sector job service
UK National Archives Discovery API: National archives catalog
UK Street Level Crime API: UK police force mapping service
UN Comtrade API: United Nations Commodity Trade Statistics Database
UN Contrade API: International trade statistics service
UN Data API: United Nations information service
Union County NC GIS API: Local North Carloina GIS service
United Nations Monthly Bulletin API: World economic development statistics
US Census Bureau API: US Census data service
US Consumer Product Safety Commission Recalls API: Consumer product recall information
US Postal Service API: Package shipping and postage
USA.gov Social Media Registry API: Social media account registry
USASearch API: Government data
USASearch Product Recall Data API: Product recall data
USAspending API: Database of US government spending
USCG Approved Equipment Listing API: Approved maritime equipment listing
USDA Animal Identification Management System API: Animal identification management service
USGS Elevation Query Service API: Determine elevation based on latitude and longitude
USGS Gazetteer Query API: Geological data service
USGS National Water Information System API: Water quality data service
USGS Seamless Datasets API: USGS mapping data service
USGS Waterservices API: Water quality information service
USITC EDIS API: U.S. trade document handling service
ValueAppeal API: Property Tax Appeal Service
Verifilter API: Financial legal compliance service
Virtual Solar Observatory API: Solar images and data
Vote.ca Districts API: Canadian Voting Place Locator Service
Voter Guide Toolkit API: Issue and candidate support information service
Voting Information Project API: Election information service
Washington DC Open 311 API: Call center service for Washington DC
Washington Post Campaign Finance API: Campaign Finance Data
Washington Post White House Visitors API: White House Visitor Log
Washington State Corporations Search API: Washington state corporations search service
Washington State Department of Revenue Sales Tax Rate API: Address based tax rate lookup service
Watchdog API: Political data lookup
West Midlands Regional Observatory API: West Midlands public information search service
What They Claimed API: Expenses records for UK members of parliament
WhatWePayFor API: Federal Budget Data Service
Where Does My Money Go API: Government spending database
Who is my Representative API: Database of US congressional representatives
WIJIS Gateway API: Wisconsin justice data search service
WMATA API: DC Transit Service
World Bank API: Worldwide indicators, business, and photo databases
World Government Data API: A portal to government data sets
WorldLingo Translation API: Language translation service





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6 Responses to “316 Government APIs: Sunlight Labs Congress, NOAA National Weather Service and US Postal Service”
at 7:14 am
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at 9:11 am
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