US government API search
Search for the data you need. The list shows APIs and web services listed on Data.gov, most popular first. Names open the Data.gov record; starred APIs stay in this browser.
13,773 API records from catalog.data.gov · collected 2026-10-11 · refreshed weekly. Data.gov shows no total for this query, because its search has no format filter.
Showing 60 of 13,773
— means the source does not establish the value. Examples are operation URLs published by the portal; check the original documentation for required keys and parameters.
Data.gov API
Department of Justice · Federal Government · Updated 2026-03-15
Federal Bureau of Investigation, Department of Justice - Extraction of crime related data from the FBI's Uniform Crime Reporting (UCR) Program
APIPublic domain236 popularity
US International Trade Commission · Federal Government · tariff codes · Updated 2024-01-09
This dataset is the current 2024 Harmonized Tariff Schedule plus all revisions for the current year. It provides the applicable tariff rates and statistical categories for all merchandise imported int…
APIPublic domain157 popularity
District of Columbia · City Government · Updated 2024-09-26
DC Department of Human Resources provides District government employees with a variety of services and programs on employee benefits, policy and procedures, performance management, and compensation. T…
ArcGIS REST, WMSCC BY117 popularity
General Services Administration · Federal Government · Updated 2018-10-09
The Federal Procurement Data System (FPDS) Next Generation has been re-engineered as a real-time federal enterprise information system. Web services based on SOAP and XML, implemented using Java techn…
APICC0109 popularity
Department of Commerce · Federal Government · Updated 2017-02-23
The U.S. Census Bureau.s economic indicator surveys provide monthly and quarterly data that are timely, reliable, and offer comprehensive measures of the U.S. economy. These surveys produce a variety…
APICC098 popularity
Department of Agriculture · Federal Government · Agriculture · Updated 2017-03-06
Quick Stats is the National Agricultural Statistics Service's (NASS) online, self-service tool to access complete results from the 1997, 2002, 2007, and 2012 Censuses of Agriculture as well as the bes…
APICC089 popularity
Department of Commerce · Federal Government · Updated 2017-02-23
The U.S. Census Bureau.s economic indicator surveys provide monthly and quarterly data that are timely, reliable, and offer comprehensive measures of the U.S. economy. These surveys produce a variety…
APICC088 popularity
District of Columbia · City Government · Updated 2026-10-06
Crashes on the roadway blocks network of Washington, DC maintained by the District Department of Transportation (DDOT) . In addition to locations, a related table consisting of crash details is availa…
ArcGIS REST, WMSCC BY80 popularity
Department of Energy · Federal Government · science · Updated 2025-08-27
OSTI.GOV is the primary search tool for DOE science, technology, and engineering research and development results and the organizational hub for information about the DOE Office of Scientific and Tech…
APIOther79 popularity
Department of Energy · Federal Government · energy · Updated 2015-05-18
This API provides international data on energy sources (e.g., coal, electricity, natural gas, petroleum, coal, renewables) and activities (e.g., consumption, imports, exports, carbon emissions, prices…
APIPublic domain77 popularity
Federal Geographic Data Committee · Federal Government · Updated 2026-10-02
The Aviation Facilities dataset is updated every 28 days from the Federal Aviation Administration (FAA) and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics…
ArcGIS RESTPublic domain73 popularity
U.S. Department of Health & Human Services · Federal Government · Community · Updated 2023-07-26
DATA.HRSA.GOV is the go-to source for data, dashboards, maps, reports, locators, APIs and downloadable data files on HRSA's public health programs, including: HRSA-funded Health Center grants, grantee…
APIODbL70 popularity
Department of Commerce · Federal Government · Updated 2024-11-27
This dataset presents statistics by employment and sales, value of shipments, or revenue size for establishments and firms; single unit and multiunit firms; concentration of largest firms; and legal f…
APICC070 popularity
Federal Election Commission · Federal Government · Updated 2026-09-10
The FEC is A RESTful web service supporting full-text and field-specific searches on federal campaign finance data.
API68 popularity
Department of Energy · Federal Government · energy · Updated 2015-08-03
Prices of petroleum products and crude oil. Weekly, monthly, and annual data available. Users of the EIA API are required to obtain an API Key via this registration form:
APIPublic domain63 popularity
US Consumer Product Safety Commission · Federal Government · Updated 2021-03-01
CPSC provides accessibility to recalls via a recall database. The information is publicly available to consumers and businesses as well as software and application developers.
APIPublic domain59 popularity
Department of Commerce · Federal Government · Updated 2024-10-30
The Manufacturing E-Commerce Statistics measures the total e-commerce data for establishments of firms with payroll for the U.S. level of manufacturing shipments and e-shipments collected by the U.S.…
APICC059 popularity
Department of Commerce · Federal Government · application · Updated 2025-08-28
Search - Conduct a search of all patent application bibliographic/front page and patent relevant data fields. This data is refreshed daily. Use this endpoint if you are interested in searching across…
APIPublic domain57 popularity
Department of Agriculture · Federal Government · Updated 2019-10-31
The Food Access Research Atlas presents a spatial overview of food access indicators for low-income and other census tracts using different measures of supermarket accessibility, provides food access…
APICC055 popularity
Department of Agriculture · Federal Government · Updated 2019-08-27
Food environment factors--such as store/restaurant proximity, food prices, food and nutrition assistance programs, and community characteristics--interact to influence food choices and diet quality. R…
APICC BY53 popularity
City of Philadelphia · City Government · Updated 2026-01-29
Comprehensive access to American Community Survey (ACS) 5-Year Estimates for Philadelphia County, Pennsylvania. The ACS is the premier source for detailed demographic, social, economic, and housing da…
APIOther52 popularity
Department of Commerce · Federal Government · application · Updated 2025-08-28
The Open Data Portal (ODP) API allows you to access USPTO data at no cost ? with several ways to do it. The ODP API uses HTTP, GET, and POST requests to return responses in JSON format. ODP also provi…
APIPublic domain51 popularity
District of Columbia · City Government · Updated 2002-06-10
Electric sub stations. Contract NCPC 93-02. This document describes the planimetric map production for the 350 tiles located in Washington DC and the surrounding states of MD and VA.
ArcGIS REST, WMSCC BY51 popularity
Federal Geographic Data Committee · Federal Government · Updated 2025-10-09
The National Waterway Network Lines dataset is periodically updated by the United States Army Corp of Engineers (USACE) and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transport…
ArcGIS RESTPublic domain48 popularity
Department of Commerce · Federal Government · image · Updated 2025-08-28
The Trademark Status and Document Retrieval (TSDR) API allows you to make programmatic requests for trademark case status, documents, and images. Beginning on October 2, 2020, you will need an API key…
APIPublic domain45 popularity
Department of Commerce · Federal Government · Updated 2019-08-27
The American Community Survey (ACS) is an ongoing survey that provides data every year -- giving communities the current information they need to plan investments and services. The ACS covers a broad…
APICC044 popularity
District of Columbia · City Government · Updated 2026-08-31
It is important for the community to understand what is – and is not – a hate crime. First and foremost, the incident must be a crime. Although that may seem obvious, most speech is not a hate crime,…
ArcGIS REST, WMSCC BY42 popularity
Department of Agriculture · Federal Government · Updated 2020-07-02
View the diversity of challenges and opportunities across America's counties within different types of rural regions and communities. Get statistics on people, jobs, and agriculture.
APICC BY41 popularity
National Archives and Records Administration · Federal Government · Updated 2026-09-10
Website and API containing the daily Federal Register.
API39 popularity
US International Trade Commission · Federal Government · tariff codes · Updated 2023-02-27
This dataset is the current 2022 Harmonized Tariff Schedule plus all revisions for the current year. It provides the applicable tariff rates and statistical categories for all merchandise imported int…
APIPublic domain38 popularity
District of Columbia · City Government · Updated 2025-11-24
This dataset contains quality assured and DOEE-certified air quality data collected from the District’s five air monitoring network sites. The dataset covers a three-year period and includes hourly co…
ArcGIS REST, WMSCC BY38 popularity
Federal Geographic Data Committee · Federal Government · Updated 2025-08-11
The National Bridge Inventory dataset is as of June 20, 2025 from the Federal Highway Administration (FHWA) and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statis…
ArcGIS RESTPublic domain38 popularity
Department of Commerce · Federal Government · Updated 2025-03-06
County Business Patterns (CBP) is an annual series that provides sub-national economic data by industry for establishments with paid employees. This series includes the number of establishments, emplo…
APICC037 popularity
Department of Commerce · Federal Government · Updated 2017-05-02
The Census data API provides access to the most comprehensive set of data on current month and cumulative year-to-date imports using the Harmonized System (HS). The Census data API also provides quant…
APICC036 popularity
Department of Commerce · Federal Government · Updated 2025-03-04
Annual Resident Population Estimates by Age, Sex, Race, and Hispanic Origin for the Nation, State, Metropolitan and Micropolitan Statistical Areas, Puerto Rico Commonwealth, Counties, Puerto Rico Muni…
APICC034 popularity
Department of Commerce · Federal Government · application · Updated 2025-08-28
Search - Conduct a search of the repository of raw public bulk data. It contains research datasets from the Office of the Chief Economist. The files are updated on a regular or ongoing basis. Use this…
APIPublic domain34 popularity
National Archives and Records Administration · Federal Government · Updated 2026-09-10
The National Archives Catalog is the online catalog of NARA's nationwide holdings in the Washington, DC area, Regional Archives, and Presidential Libraries.
API33 popularity
Department of the Interior · Federal Government · Updated 2026-10-09
Daily instantaneous lake/reservoir elevation in feet for Lake Powell, Glen Canyon Dam, and Powerplant. Data are typically updated once a day.
API32 popularity
City of Philadelphia · City Government · Updated 2026-09-10
Information regarding applications for licenses required by the City to conduct certain business activities. Licenses are required for individuals and businesses to engage in select commercial activit…
APIOther32 popularity
National Archives and Records Administration · Federal Government · Updated 2013-12-15
More than 100 social media channels and statistics for the National Archives and Records Administration.
API32 popularity
Federal Geographic Data Committee · Federal Government · Updated 2026-07-22
The North American Rail Network (NARN) Rail Lines dataset was created in 2016 and was updated on July 21, 2026 from the Federal Railroad Administration (FRA) and is part of the U.S. Department of Tran…
ArcGIS RESTPublic domain30 popularity
Federal Geographic Data Committee · Federal Government · Updated 2026-09-30
The Navigation Facilities dataset is periodically updated by the United States Army Corp of Engineers (USACE) and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Stat…
ArcGIS RESTPublic domain28 popularity
Department of Commerce · Federal Government · Updated 2019-08-29
The American Community Survey (ACS) is an ongoing survey that provides data every year -- giving communities the current information they need to plan investments and services. The ACS covers a broad…
APICC028 popularity
Department of Agriculture · Federal Government · Agriculture · Updated 2015-02-02
The Census of Agriculture provides a detailed picture every five years of U.S. farms and ranches and the people who operate them. Conducted by USDA’s National Agricultural Statistics Service, the 2012…
APICC027 popularity
Department of the Interior · Federal Government · Updated 2026-10-10
Potholes Reservoir and O'Sullivan Dam (POT) instant daily lake/reservoir elevation in feet (ft). Elevation is typically reported as feet above mean sea level (msl) for the location specified datum. Da…
API26 popularity
District of Columbia · City Government · Updated 2023-08-04
The dataset contains locations and attributes of Embassies, created as part of the DC Geographic Information System (DC GIS) for the D.C. Office of the Chief Technology Officer (OCTO) and participatin…
ArcGIS REST, WMSCC BY26 popularity
US International Trade Commission · Federal Government · tariff codes · Updated 2021-04-27
This dataset is the current 2021 Harmonized Tariff Schedule plus all revisions for the current year. It provides the applicable tariff rates and statistical categories for all merchandise imported int…
APIPublic domain25 popularity
Department of Energy · Federal Government · energy · Updated 2014-02-27
Monthly, quarterly, and annual data on electricity generation, consumption, retail sales, price, revenue from retail sales, useful thermal output, fossil fuel stocks, fossil fuel receipts, and quality…
APIPublic domain25 popularity
Department of Energy · Federal Government · energy · Updated 2019-03-21
Weekly, monthly, and annual data on crude oil, gasoline, diesel, propane, jet fuel, ethanol, and other liquid fuels. Domestic and international data on petroleum prices, crude reserves and production,…
APIPublic domain25 popularity
District of Columbia · City Government · Updated 2026-04-13
Through the Supermarket Tax Exemption Act of 2000, the District waives certain taxes and fees to grocery stores that locate in specific neighborhoods. The incentive encourages development and investme…
ArcGIS REST, WMSCC BY24 popularity
District of Columbia · City Government · Updated 2026-08-20
This dataset was originally created in 2012 by the Office of the Chief Technology Officer. OCTO staff used the Alcoholic Beverage and Cannabis Administration’s (ABCA) definition of Full-Service Grocer…
ArcGIS REST, WMSCC BY24 popularity
District of Columbia · City Government · Updated 2022-02-04
Road edges are defined as the edge of the improved surface including the improved shoulder but do not include the unimproved shoulder, only the travel part of the road. The road network is compiled to…
ArcGIS REST, WMSCC BY24 popularity
Department of Commerce · Federal Government · Updated 2020-03-17
Annual Resident Population Estimates by Age, Sex, Race, and Hispanic Origin; for the United States, States, and Puerto Rico: April 1, 2010 to July 1, 2019 // Source: U.S. Census Bureau, Population Div…
APICC023 popularity
District of Columbia · City Government · Updated 2023-03-14
Speed detector locations. The dataset contains locations and attributes of Speed detector, created as part of the District of Columbia, Department of Transportation (DDOT) Street Spatial Database (SSD…
ArcGIS REST, WMSCC BY23 popularity
District of Columbia · City Government · Updated 2024-09-05
The “EntertainmentSportsGamblingZones” layer identifies a two-block restriction zone emanating from the gambling entity’s physical location going outward two blocks in all directions. The class “A” en…
ArcGIS REST, WMSCC BY22 popularity
US International Trade Commission · Federal Government · tariff codes · Updated 2023-03-09
This dataset is the current 2023 Harmonized Tariff Schedule plus all revisions for the current year. It provides the applicable tariff rates and statistical categories for all merchandise imported int…
APIPublic domain21 popularity
Department of Energy · Federal Government · energy · Updated 2014-02-27
Data on crude oil reserves and production; refining and processing; imports, exports, movements; stocks; prices; and consumption/sales are available in machine-readable format. Users of the EIA API ar…
APIPublic domain21 popularity
Department of Commerce · Federal Government · Updated 2018-10-19
Midyear population estimates and projections for all countries and areas of the world with a population of 5,000 or more and selected subnational areas // Source: U.S. Census Bureau, Population Divisi…
APICC020 popularity
Department of Commerce · Federal Government · Updated 2025-07-30
The American Community Survey (ACS) Public Use Microdata Sample (PUMS) contains a sample of responses to the ACS. The ACS PUMS dataset includes variables for nearly every question on the survey, as we…
APICC020 popularity
Department of Energy · Federal Government · science · Updated 2025-08-27
The Department of Energy Public Access Gateway for Energy and Science (DOE PAGES) is the DOE search tool that makes scholarly scientific publications, resulting from DOE research funding, publicly acc…
APIOther20 popularity
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Publishers (1+ APIs)
- City of Philadelphia 19
- City of Tempe 53
- Department of Agriculture 17
- Department of Commerce 1,831
- Department of Education 1
- Department of Energy 159
- Department of Housing and Urban Development 1
- Department of Justice 11
- Department of Veterans Affairs 3
- Department of the Interior 7,264
- District of Columbia 1,227
- Federal Election Commission 1
- Federal Geographic Data Committee 24
- General Services Administration 5
- Louisville Metro Government 2
- National Archives and Records Administration 3
- State of California 3
- U.S. Department of Health & Human Services 3,059
- U.S. Environmental Protection Agency 1
- U.S. Office of Government Ethics 3
- US Consumer Product Safety Commission 2
- US International Trade Commission 5
- Vermont Center for Geographic Information 79
About this list
GovAPI Atlas is an index of the APIs and web services that national government open-data portals publish. This edition's list was read from Data.gov on 2026-10-11 and is refreshed every week. GovAPI Atlas does not host the APIs; you apply for and call them on the portal itself.
What is included
Records on catalog.data.gov that have at least one distribution typed as an API or a web service (API, ArcGIS REST, OGC WMS, WFS). Data.gov search has no format filter, so we search for API, WMS and WFS and keep only records whose distributions carry one of those types. About 7,300 of them are Bureau of Reclamation RISE time series (Department of the Interior), one record per site and measure; their API entries carry no address in the catalog, so open the record to reach the API.
Source
Source: Data.gov (https://catalog.data.gov). Federal records are in the US public domain; records harvested from states and cities can carry their own terms.
Frequently asked questions
How do I get an API key for US federal APIs on api.data.gov?
You sign up once at api.data.gov and receive your own 40 character API key. That one key works for all APIs from agencies that participate in the api.data.gov service, and it should be kept private. Source
What are the default rate limits for an api.data.gov key?
The default limit is 1,000 requests per hour per API key, counted across all api.data.gov APIs, although individual services may set different limits. If you exceed it, the key is temporarily blocked and the block lifts after an hour. For higher limits you contact the agency that runs the API. Source
Can I try api.data.gov APIs without signing up?
Yes, the documentation examples use a special DEMO_KEY that works before you sign up. It is limited to 30 requests per IP address per hour and 50 requests per IP address per day, so a personal key is recommended for real use. Source
Is there an API for searching the Data.gov catalog, and where is it documented?
Yes, the Data.gov Catalog API is documented at resources.data.gov/catalog-api and uses the base URL https://api.gsa.gov/technology/datagov/v4/. It replaces the earlier CKAN-based API, and requests to it are made with a free api.data.gov key in the X-Api-Key header. Note that the catalog returns metadata about datasets, not the data itself. Source
Can I reuse data found through Data.gov, including commercially?
In most cases, US federal data on Data.gov is offered free and without restriction, and works created by federal employees in their official duties are not subject to domestic copyright. Non-federal data such as state or university data may have different terms, so you check the Access and Use Information section on each dataset page. Source