| API | Description | Category | Mashups |
|---|---|---|---|
| Sunlight Labs Congress | US Congress database service | Government | 19 |
| OpenSecrets | U.S. political data lookup | Government | 7 |
| GovTrack.us | US Congress database service | Government | 6 |
| Cicero | Address-based district matching and elected official lookup service | Government | 5 |
| Follow The Money | Database of US campaign contributions | Government | 4 |
| New York Times Congress | US Congress historical data | Government | 4 |
| MapLight | Government database linking contributions and votes | Government | 3 |
| New York Times Campaign Finance | U.S. campaign finance data | Government | 3 |
| PDXCouncilConnect | Portland (Oregon) City Council voting service | Government | 3 |
| Australian Business Number Lookup | Australian business number refernece service | Government | 2 |
| Capitol Words | Track words used by US government representatives | Government | 2 |
| NYC Open Data | New York City data collection | Government | 2 |
| ActBlue | Democratic fundraising service | Government | 1 |
| Business.gov | US government small business resources | Government | 1 |
| CitySourced | Mobile civic engagment tool | Government | 1 |
| Data.gov.uk | Public government database | Government | 1 |
| Democracy In Action | eAdvocacy services for nonprofits | Government | 1 |
| FCC | U.S. Communications Data Service | Government | 1 |
| FedSpending.org | Database of US government spending | Government | 1 |
| Google Civic Information | Civic information service | Government | 1 |
| ikregeer.nl | Dutch parliament documents | Government | 1 |
| Open Government Data Initiative | Government data resource from Microsoft | Government | 1 |
| Open Patent Services | European Patent Office web services | Government | 1 |
| San Francisco Crimespotting | Crimespotting data for San Francisco California | Government | 1 |
| TheyWorkForYou | Track the UK Parliament | Government | 1 |
| Transparency Data | State and Federal campaign contribution data | Government | 1 |
| UK Street Level Crime | UK police force mapping service | Government | 1 |
| Union County NC GIS | Local North Carloina GIS service | Government | 1 |
| WMATA | DC Transit Service | Government | 1 |
| Aadhaar UIDAI Authentication | Online authentication for Indian citizens | Government | 0 |
| AES WebLink | Shipment submission and inquiry services | Government | 0 |
| AIDS.gov Service Provider Locator | HIV/AIDS testing and care information service | Government | 0 |
| AIMS Address | Johnson County Kansas address lookup service | Government | 0 |
| Alameda County Service Provider | listings for social services in Alameda County (Oakland), CA | Government | 0 |
| API.LEIPZIG | Leipzig city data | Government | 0 |
| Apps for Ghent | Belgian open data service | Government | 0 |
| ASC National Registry Search | Search service for registered real estate appraisers | Government | 0 |
| Australian Business Register ABN Lookup | Australian Business Number look-up service | Government | 0 |
| Örebro kommun | Örebro kommun information | Government | 0 |
| Baltimore Open311 | Neighborhood public issue reporting tool | Government | 0 |
| Berlin Open Data | Berlin data and information | Government | 0 |
| Black Book Online | U.S. public record search service | Government | 0 |
| Blue Mountains Development Applications | Local development application status tracking service | Government | 0 |
| Brazil CKAN | Brazil open government data | Government | 0 |
| Brazilian Election Candidates | Brazilian election candidate information service | Government | 0 |
| BugetMD | Moldovan government information service | Government | 0 |
| BundesTagger | German Parliamentary proceedings | Government | 0 |
| California ISO | Utility regulatory information system | Government | 0 |
| California Race and Ethnic Population Projections | California race and ethnic population projection data | Government | 0 |
| Canada's Economic Action Plan | Information of Canadian government EAP | Government | 0 |
| CENSUS.IRE.ORG | 2010 census data access service | Government | 0 |
| Challenge.gov | Government challenge/solution platform | Government | 0 |
| Chicago Metropulse | Chicago quality of life data | Government | 0 |
| Chicago Police Department CLEARpath | Crime-related information and resources | Government | 0 |
| CIR VA Backlog | Veterans Affairs benefits data | Government | 0 |
| City of Boston Citizen's Connect | Boston residents reporting service | Government | 0 |
| City of Chicago Data Portal | Chicago datasets | Government | 0 |
| City of Edmonton Open Data Catalogue | City of Edmonton datasets | Government | 0 |
| City of Helsinki Issue Reporting | Public works maintenance issue reporting service | Government | 0 |
| City of Helsinki Open Ahjo | Civil decision-making information service | Government | 0 |
| City of Helsinki Service Map | Helsinki information and service resource map | Government | 0 |
| City of Nanaimo | Nanaimo, B.C., datasets | Government | 0 |
| City of New Orleans | New Orleans city data | Government | 0 |
| City of Palo Alto | City of Palo Alto open data | Government | 0 |
| City of Rennes | City of Rennes, France datasets | Government | 0 |
| City of St. Louis | City of St. Louis data | Government | 0 |
| City of Toronto: 311 | Toronto city government services | Government | 0 |
| Cityworks | Municipal functions management service | Government | 0 |
| Civic Commons Marketplace | Open government data database and sharing platform | Government | 0 |
| Civic Footprint | Political geography lookup for Illinois | Government | 0 |
| CivicApps Restaurant Inspections | Restaurant food safety information service | Government | 0 |
| CKAN Czech Republic | Czech Republic open government data | Government | 0 |
| CKAN Ireland | Ireland open government data | Government | 0 |
| CKAN Italy | Italian open government data | Government | 0 |
| CKAN Norway | Norway open government data | Government | 0 |
| Colorado HBGuest | Colorado water resources data service | Government | 0 |
| ColoradoWaterSMS | Colorado surface water resource data service | Government | 0 |
| Czech Customs Administration TaricCZ | Czech import/export codes database | Government | 0 |
| Data Greater Manchester | Manchester, England open government data | Government | 0 |
| Data.CookCountyIL.Gov | Cook County, IL government data | Government | 0 |
| data.gov.au | Australia government data | Government | 0 |
| data.gov.sg | Singapore government data | Government | 0 |
| Data.Illinois.Gov | Illinois government data | Government | 0 |
| Data.OK.gov | Oklahoma state government data | Government | 0 |
| Data.Oregon.Gov | Oregon state government data | Government | 0 |
| Data.Seattle.Gov | Seattle City Government data | Government | 0 |
| Data.Washington | Washington state data | Government | 0 |
| Datadotgc.ca | Canadian open government data | Government | 0 |
| DataGov.ru | Russian open government data | Government | 0 |
| Datahotell | Norway open government data | Government | 0 |
| DataKC | Seattle and King County open data service | Government | 0 |
| Datanest Fair-Play Alliance | Slovakia government data | Government | 0 |
| DC Location Verifier | DC place finder and address verification service | Government | 0 |
| DEA Number | U.S. DEA controlled substance validation service | Government | 0 |
| Denmark Central Business Register (CVR) | Danish business information retrieval service | Government | 0 |
| deutschland | German elected officials information service | Government | 0 |
| DevLeap Codice Fiscale | Italian citizen tax ID reference service | Government | 0 |
| Diavgeia | Greek open government information service | Government | 0 |
| DirectGov syndication service | UK government content syndication service | Government | 0 |
| dotNetHell Calcolo Codice Fiscale | Italian tax code reference service | Government | 0 |
| DRCOG | Denver area spatial data | Government | 0 |
| Drumbone | US political data aggregated from multiple sources | Government | 0 |
| Electioneering | Comparative information on public office candidates | Government | 0 |
| eLobbyist LegiScan | U.S. national and local legislation tracking service | Government | 0 |
| Empire 2.0 Tech Talk | Government technology discussion platform | Government | 0 |
| EnergyStar ABS | Energy management and conservation service | Government | 0 |
| EnergyStar Third-Party Certification | Energy efficiency certification processing service | Government | 0 |
| European Union Legislation | European Union legislative data service | Government | 0 |
| Excluded Parties List System | List of entities ineligible for Federal contracts | Government | 0 |
| FCC Form 499 Filer Database | Common carrier reporting information service | Government | 0 |
| FedBizOpps | U.S. government procurement and purchasing service | Government | 0 |
| Federal Infrastructure Projects | Federal project dashboard | Government | 0 |
| Federal Procurement Data System | U.S. government purchasing and procurement information service | Government | 0 |
| FederalRegister.gov | Open source government data | Government | 0 |
| Find Your MP- UK Parliament | UK MP search tool | Government | 0 |
| Finnish Parliament Votings | Voting results of the Finnish Parliament | Government | 0 |
| Florida DHSMV | Florida motor vehicle testing outsourcing service | Government | 0 |
| FRED | US Federal Reserve Economic data | Government | 0 |
| FreedomSpeaks | United States political data lookup | Government | 0 |
| FSRS FFATA Reporting | U.S. government contractor reporting service | Government | 0 |
| Georgia Revenue Service WayBill | Electronic waybill creation and management service | Government | 0 |
| Gipuzkoa | Spanish province government data | Government | 0 |
| Go.USA.gov | Government domain URL shortener | Government | 0 |
| GOP.gov | US Congressional Republicans data | Government | 0 |
| Goslyudi.ru | Public ratings of Russian government bloggers | Government | 0 |
| GovData | Swedish Government tax expenditure data | Government | 0 |
| Government of the Canary Islands Platino | e-Government services platform | Government | 0 |
| GovTracker | Rhode Island state data services | Government | 0 |
| Granica | Polish border crossing and tax information services | Government | 0 |
| Granicus Open Platform | Government open data service | Government | 0 |
| Granicus Search | Government agency search service | Government | 0 |
| Granicus Training Management Suite | Government employee training service | Government | 0 |
| Greater Taree City Council AutoComplete | Autocomplete service for Australian development application search | Government | 0 |
| Greek Republic Ministry of Finance GSIS | Greek citizens and traders information service | Government | 0 |
| Guardian Politics | UK government and political resources | Government | 0 |
| Hawkesbury City Council Masterview | Local development application tracking service | Government | 0 |
| HealthData.gov | Health data service | Government | 0 |
| Healthfinder.gov | Government health agency information | Government | 0 |
| Helsinkikanava Open Data | Helsinki city council meeting information and recordings | Government | 0 |
| HM Revenue & Customs | UK tax document submission service | Government | 0 |
| Home Energy Saver | Energy calculator tool | Government | 0 |
| Hornsby Shire Council Application Enquiry | Local development application progress tracking service | Government | 0 |
| How'd They Vote? | Canadian Parliament voting records | Government | 0 |
| HUD iMAX | Tenant and voucher data transmission service | Government | 0 |
| Idescat Embed | Catalan official statistics | Government | 0 |
| Idescat Municipality in Figures | Statistical information on Catalan municipalities | Government | 0 |
| Idescat Onomastics API | Catalan name data | Government | 0 |
| Illinois Voter Registration System | Voter registration service | Government | 0 |
| Income Tax India e-Filing | India Income Tax e-Filing service | Government | 0 |
| Influence Explorer Text | Textual analysis tool | Government | 0 |
| Institute of Development Studies | Research and data repository | Government | 0 |
| International Aid Transparency Initiative | Aid spending index | Government | 0 |
| IUID Registry | U.S. Department of Defense procurement information service | Government | 0 |
| Joinup | e-Government interoperability services review and sharing platform | Government | 0 |
| Kenya Open Data | Kenya datasets | Government | 0 |
| King County Open Data | King County, WA datasets | Government | 0 |
| la Loter�a del Ni�o | Spanish Lottery Information Lookup | Government | 0 |
| Larimer County Public Records Databases | Larimer County property and property tax information service | Government | 0 |
| legislation.gov.uk | UK legislation information service | Government | 0 |
| LittleSis | Database for tracking political and business relationships | Government | 0 |
| London DataStore | London government data | Government | 0 |
| LOUIS | US federal documents database | Government | 0 |
| ManageMyRequests | Information request tracking and reporting service | Government | 0 |
| MAPLight.org Bill Positions | Campaign donation and vote tracking service | Government | 0 |
| Maryland Driver and Vehicle Record | State motor vehicle records service | Government | 0 |
| MKDenial Dpl | Export restriction compliance service | Government | 0 |
| MMO Electronic Reporting System | U.K. fishing catch and sales reporting service | Government | 0 |
| Mobile Commons Legislative Lookup | Legislative representative information service | Government | 0 |
| Municipal DataWorks | Municipal asset data management service | Government | 0 |
| MyBikeLane | Read-Only API for MyBikeLane and UncivilServants Database | Government | 0 |
| NAIC Registry | Insurance regulation compliance services | Government | 0 |
| Nantes open data | Nantes, France city data | Government | 0 |
| National Broadband Map | US broadband information | Government | 0 |
| Nephics European VAT Number Validation | EU VAT information exchange system | Government | 0 |
| New Dawn ACM | Case managment software | Government | 0 |
| New Dawn JustWare | Criminal justice agency and court information service | Government | 0 |
| New York Times Districts | Political districts service | Government | 0 |
| New York Times NY State Legislature | NY State legislative member information | Government | 0 |
| North Sidney Council Application Master | Local development application progress tracking service | Government | 0 |
| Nos Données (Our Data) | Government data | Government | 0 |
| NSW Motor Vehicle Reporting App | Australian car pollution reporting service | Government | 0 |
| NSW Office of Water Hydstra | New South Wales water monitoring data service | Government | 0 |
| NSW State Records | New South Wales Government archives and records | Government | 0 |
| NY Senate | New York state Senate data access | Government | 0 |
| NYC 311 Online | New York City Government data | Government | 0 |
| O*NET | U.S. occupation and job information service | Government | 0 |
| Oakland Crime Reports | crime reports service | Government | 0 |
| Oakland Crimespotting | Oakland, Calif., crime information service | Government | 0 |
| OffeneDaten | Germany open government data | Government | 0 |
| Office for National Statistics | UK neighborhood and census data | Government | 0 |
| Oklahoma Compulsory Insurance Verification System | State insurance verification service | Government | 0 |
| Open Data Badalona | Badalona city data services | Government | 0 |
| Open Data Catalogue Austria | Austria open data | Government | 0 |
| Open Data Euskadi | Basque Country government data | Government | 0 |
| Open Data gencat | Catalonia government data | Government | 0 |
| Open Dems Polling Place | Polling place location service | Government | 0 |
| Open Dems Voter Registration | Voter registration service | Government | 0 |
| Open Energy Information | Energy resource data services | Government | 0 |
| Open Kent | Kent, England county data | Government | 0 |
| Open Knesset User Voting API | Israeli government data | Government | 0 |
| Open New York Child Care Regulated Programs | Child care regulation data for New York State | Government | 0 |
| Open North Represent | Database and API for Canadian elected officials | Government | 0 |
| Open State Project | Provides State Legislative Information | Government | 0 |
| Open States | State legislative information | Government | 0 |
| Open Stockholm | Stockholm city data | Government | 0 |
| Open311 | Neighborhood public issue-tracking service | Government | 0 |
| OpenAustralia | Australian government information service | Government | 0 |
| OpenBaltimore | Baltimore City data | Government | 0 |
| OpenColorado | Colorado Open Data Catalog | Government | 0 |
| OpenCongress | US government data | Government | 0 |
| OpenDataPhilly | City of Philadelphia data | Government | 0 |
| OpenGov NSW | New South Wales government data service | Government | 0 |
| opengov.es | Spain open government data | Government | 0 |
| opengov.fi | Finland open government data | Government | 0 |
| OpenGovernment | State and local government data | Government | 0 |
| Openly Local | Government information tracking service | Government | 0 |
| openparliament.ca | Canadian Parliament Hansards | Government | 0 |
| ParliamentData.ca | Canadian Parliamentary data | Government | 0 |
| PDX | Portland geographic and real-time information | Government | 0 |
| PDX CitySync | PDX Public Data Service | Government | 0 |
| Poligraft | Political Entity Extraction Service | Government | 0 |
| Postcode Anywhere Government Data | UK government data service | Government | 0 |
| Project Vote Smart | U.S. political data lookup | Government | 0 |
| ProPublica Forensics | Geographic autopsy data | Government | 0 |
| PublicData.eu | European government open data aggregator | Government | 0 |
| RealSearch TIN Reverse | Tax ID verficiation service | Government | 0 |
| Recovery.gov | Recovery Act 2009 data | Government | 0 |
| Redbridge DataShare | UK government data | Government | 0 |
| RegistryCompliance Scrub | Registry Compliance Service | Government | 0 |
| Regulations.gov | U.S. government regulations document repository | Government | 0 |
| ReportIt | UK government trouble report service | Government | 0 |
| Research.gov Application Submission | Grant application submission service | Government | 0 |
| RestFul Web Services UNSPSC | eCommerce product classification code reference | Government | 0 |
| RI.gov Open Data | Rhode Island government information | Government | 0 |
| Richmond Sunlight | Virginia general assembly information aggregator | Government | 0 |
| SAMHSA | Substance abuse and mental health services | Government | 0 |
| San Francisco Ethics Commission Lobbyist | San Francisco lobbyist information database | Government | 0 |
| San Francisco Open311 | Neighborhood public issue reporting tool | Government | 0 |
| Sao Paolo Open Government | Sao Paolo state government portal | Government | 0 |
| SBA City and County Data | U.S. City and County data service | Government | 0 |
| Science.gov | Science information service | Government | 0 |
| SeeClickFix | Share non-emergency problems in your neighborhood | Government | 0 |
| Shropshire Council | UK government portal | Government | 0 |
| SI-TSA Timestamp | Slovenian time stamp service | Government | 0 |
| Socrata Open Data | Online data sharing service | Government | 0 |
| SSA CBSV | Social security number validation service | Government | 0 |
| St. Louis FRED | Economic research data service | Government | 0 |
| State Decoded | State law information | Government | 0 |
| StreetLightOutages | Street light maintenance information service | Government | 0 |
| Sunlight Foundation Capitol Words | Congressional word-use frequency and context reference | Government | 0 |
| Sunlight Foundation Influence Explorer | U.S. political contributions database | Government | 0 |
| Sunlight Foundation Open States | State politics information service | Government | 0 |
| Sunlight Foundation's Party Time! | Political fundraiser invitation database | Government | 0 |
| Sunlight Labs Real-time Congress | Near Real-Time Information on the Current Congress Session | Government | 0 |
| Suomi.fi | Finland government services portal | Government | 0 |
| Tell Them What You Think | UK government consultations database | Government | 0 |
| Texas Franchise Tax | State tax reporting service | Government | 0 |
| The Finder Sales Tax | Ohio sales tax data service | Government | 0 |
| The Old Bailey | UK criminal court record search service | Government | 0 |
| Toronto Budget Data | City of Toronto budget data service | Government | 0 |
| Turkish National Police AKBS | Temporary accommodations guest reporting system | Government | 0 |
| U.K National Grid Energy Flow | Energy consumption and supply information service | Government | 0 |
| U.S. Department of Labor | Government open data service | Government | 0 |
| U.S. Department of State Office of the Historian Ebook Catalog | Foreign policy and diplomacy historical database | Government | 0 |
| U.S. Energy Information Administration | National energy information | Government | 0 |
| UK BIS | UK government business support sector | Government | 0 |
| UK National Archives Discovery | National archives catalog | Government | 0 |
| UN Comtrade | United Nations Commodity Trade Statistics Database | Government | 0 |
| UN Contrade | International trade statistics service | Government | 0 |
| UN Data | United Nations information service | Government | 0 |
| United Nations Monthly Bulletin | World economic development statistics | Government | 0 |
| US Census Bureau | US Census data service | Government | 0 |
| US Consumer Product Safety Commission Recalls | Consumer product recall information | Government | 0 |
| USA.gov Social Media Registry | Social media account registry | Government | 0 |
| USASearch | Government data | Government | 0 |
| USAspending | Database of US government spending | Government | 0 |
| USCG Approved Equipment Listing | Approved maritime equipment listing | Government | 0 |
| USCG MARPOL Certificates of Adequacy | Certified maritime facility database | Government | 0 |
| USCG Port State Information Exchange | Marine vessel information service | Government | 0 |
| USDA Animal Identification Management System | Animal identification management service | Government | 0 |
| USDA Economic Research Service | USDA content for economic and policy issues | Government | 0 |
| USDA Soil Data Access | U.S. agricultural soil survey service | Government | 0 |
| USGS Waterservices | Water quality information service | Government | 0 |
| USITC EDIS | U.S. trade document handling service | Government | 0 |
| VetSuccess | U.S. military veterans employment service | Government | 0 |
| Vote.ca Districts | Canadian Voting Place Locator Service | Government | 0 |
| Voter Guide Toolkit | Issue and candidate support information service | Government | 0 |
| Voting Information Project | Election information service | Government | 0 |
| Washington DC Open 311 | Call center service for Washington DC | Government | 0 |
| Washington Post Campaign Finance | Campaign Finance Data | Government | 0 |
| Washington Post White House Visitors | White House Visitor Log | Government | 0 |
| Washington State Department of Revenue Sales Tax Rate | Address based tax rate lookup service | Government | 0 |
| Watchdog | Political data lookup | Government | 0 |
| We the People | White House petition data | Government | 0 |
| What They Claimed | Expenses records for UK members of parliament | Government | 0 |
| WhatWePayFor | Federal Budget Data Service | Government | 0 |
| Where Does My Money Go | Government spending database | Government | 0 |
| Who is my Representative | Database of US congressional representatives | Government | 0 |
| WIJIS Gateway | Wisconsin justice data search service | Government | 0 |
| World Government Data | A portal to government data sets | Government | 0 |
| Wyoming FRVP | Auto insurance verification service | Government | 0 |
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