name: Public Sector description: >- Industry-vertical index for the public-sector / government API landscape across U.S. federal, state, and local levels. Catalogs the federal API gateway api.data.gov (operated by GSA's Technology Transformation Services under the Open Government Data Act of 2018, used by 25 agencies for over 450 APIs), the catalog.data.gov CKAN metadata catalog, headline federal programmatic surfaces (Regulations.gov, Federal Register, GovInfo, SAM.gov, USAspending.gov, Treasury Fiscal Data, Congress.gov, FEC openFEC, api.weather.gov, api.nasa.gov, Census Data API, Bureau of Economic Analysis), state and local infrastructure (Socrata / Tyler Data and Insights, Tyler Technologies courts/ERP/public-safety stack, OpenGov ERP/budgeting/permitting cloud), and the civic-tech layer (OpenStates / Plural Policy, GovTrack, Open Civic Data). Cross-references Kin Lane's 2026-05-05 roundup of 211 U.S. federal agencies and their APIs on apievangelist.com. The catalog focuses on the data-schema shape of a government dataset / agency / regulation record so that civic-tech and enterprise consumers can normalize across federal, state, and local publishers. url: https://github.com/api-evangelist/public-sector humanURL: https://github.com/api-evangelist/public-sector image: '' tags: - Public Sector - Government - Federal - State - Local - Civic Tech - Open Data - Regulations - Procurement - Open Government - Topic created: '2026-05-23' modified: '2026-05-23' specificationVersion: '0.18' type: Index apis: - name: api.data.gov description: >- Free API management gateway operated by the U.S. General Services Administration's Technology Transformation Services. Fronts the API keys, rate limiting, and analytics for over 450 APIs across roughly 25 participating federal agencies and serves as GSA's vehicle for fulfilling the Open Government Data Act of 2018. A single api.data.gov key is reusable across NASA, NREL, USDA, USDOT, Department of Education, Regulations.gov, GovInfo, and many other federal API surfaces. humanURL: https://api.data.gov baseURL: https://api.data.gov tags: - Federal - API Gateway - GSA - API Keys - Rate Limiting properties: - type: Portal url: https://api.data.gov - type: Documentation url: https://api.data.gov/docs/ - type: SignUp url: https://api.data.gov/signup/ - type: GitHubOrganization url: https://github.com/18F - type: GitHubRepository url: https://github.com/18F/api.data.gov - name: data.gov (CKAN catalog) description: >- The U.S. federal open data catalog at catalog.data.gov, powered by the open-source CKAN platform. The CKAN Action API at https://catalog.data.gov/api/3/action/ exposes dataset metadata (package_search, package_show, package_list), organization listings (organization_list, organization_show), groups, tags, and resource records. data.gov holds only metadata about datasets, not the underlying data — each dataset entry links out to the publishing agency's authoritative resource URLs (CSV, JSON, GeoJSON, Shapefile, SODA, REST). humanURL: https://www.data.gov baseURL: https://catalog.data.gov/api/3/ tags: - Federal - Catalog - Open Data - CKAN - Metadata properties: - type: Portal url: https://www.data.gov - type: Catalog url: https://catalog.data.gov - type: APIEndpoint url: https://catalog.data.gov/api/3/action/ - type: Documentation url: https://docs.ckan.org/en/latest/api/index.html - type: GitHubRepository url: https://github.com/GSA/data.gov - name: Regulations.gov API description: >- The Regulations.gov v4 REST API exposes federal regulatory dockets, documents (Proposed Rules, Rules, Supporting & Related Material, Other), and public comments. Read endpoints follow api.data.gov rate-limit policies; the commenting endpoint is restricted to 50 requests per minute with a secondary limit of 500 requests per hour. Authentication uses an X-Api-Key header issued from api.data.gov, with DEMO_KEY available for testing. humanURL: https://www.regulations.gov baseURL: https://api.regulations.gov/v4 tags: - Federal - Regulations - Dockets - Documents - Comments - api.data.gov properties: - type: Portal url: https://www.regulations.gov - type: Documentation url: https://open.gsa.gov/api/regulationsgov/ - type: Authentication url: https://api.data.gov/signup/ - name: Federal Register API description: >- JSON REST API for the daily Federal Register published by the Office of the Federal Register and GPO. Exposes documents (Notice, Proposed Rule, Rule, Presidential Document), agencies, public-inspection documents, suggested searches, and Topics. No API key required for read access. Used by FederalRegister.gov, regulations.gov, and downstream legal analytics tools. humanURL: https://www.federalregister.gov baseURL: https://www.federalregister.gov/api/v1 tags: - Federal - Federal Register - Regulations - GPO properties: - type: Portal url: https://www.federalregister.gov - type: Documentation url: https://www.federalregister.gov/developers/api/v1 - type: GitHubOrganization url: https://github.com/usnationalarchives - type: GitHubRepository url: https://github.com/usnationalarchives/federalregister.gov - name: GovInfo API description: >- U.S. Government Publishing Office (GPO) GovInfo developer hub. The Collections API at api.govinfo.gov delivers self-describing packages of authoritative federal content — Congressional bills, Federal Register, Code of Federal Regulations, Public and Private Laws, Statutes at Large, Compilation of Presidential Documents, U.S. Courts opinions, and more. Companion services include the Search Service API (added 2023), the Related Documents Service API (added 2021), the Bulk Data repository, the Link Service, and RSS feeds. Auth via api.data.gov key. humanURL: https://www.govinfo.gov baseURL: https://api.govinfo.gov tags: - Federal - GPO - Bills - Federal Register - CFR - Bulk Data - api.data.gov properties: - type: Portal url: https://www.govinfo.gov - type: Documentation url: https://api.govinfo.gov/docs/ - type: BulkData url: https://www.govinfo.gov/bulkdata - type: Authentication url: https://api.data.gov/signup/ - name: SAM.gov APIs description: >- System for Award Management (SAM.gov), the U.S. federal procurement and financial assistance system, exposes 11 production APIs catalogued at open.gsa.gov including Entity Management, Exclusions, Federal Hierarchy (Public and FOUO variants), Contract Opportunities (Get Opportunities Public, Opportunity Management), Contract Awards, Product Service Codes, Public Location Services, Assistance Listings Public, Subaward Reporting (Acquisition and Assistance), and Entity/Exclusions Extracts Download. Auth via api.data.gov key. humanURL: https://sam.gov baseURL: https://api.sam.gov tags: - Federal - Procurement - SAM.gov - Entity - Exclusions - Opportunities - api.data.gov properties: - type: Portal url: https://sam.gov - type: Documentation url: https://open.gsa.gov/api/ - type: Authentication url: https://api.data.gov/signup/ - name: USAspending.gov API description: >- The USAspending API, maintained by the U.S. Department of the Treasury, provides public access to comprehensive U.S. government spending data including federal contracts, grants, loans, direct payments, agency and geographic breakdowns, and account-level information such as employee compensation. The API helps federal agencies meet their DATA Act reporting obligations. Currently version 2; v1 endpoints are deprecated. No API key required for read access. humanURL: https://www.usaspending.gov baseURL: https://api.usaspending.gov/api/v2/ tags: - Federal - Treasury - Spending - Contracts - Grants - DATA Act properties: - type: Portal url: https://www.usaspending.gov - type: Documentation url: https://api.usaspending.gov/docs/ - type: GitHubOrganization url: https://github.com/fedspendingtransparency - type: GitHubRepository url: https://github.com/fedspendingtransparency/usaspending-api - name: Treasury Fiscal Data API description: >- Bureau of the Fiscal Service API at api.fiscaldata.treasury.gov exposing Treasury's authoritative fiscal datasets — Debt to the Penny, Monthly Treasury Statement, Daily Treasury Statement, Exchange Rates, Treasury Reporting Rates of Exchange, Average Interest Rates, Historical Debt Outstanding, and Securities Outstanding. JSON / XML / CSV responses. No API key required. humanURL: https://fiscaldata.treasury.gov baseURL: https://api.fiscaldata.treasury.gov/services/api/fiscal_service/ tags: - Federal - Treasury - Fiscal Data - Debt - Exchange Rates properties: - type: Portal url: https://fiscaldata.treasury.gov - type: Documentation url: https://fiscaldata.treasury.gov/api-documentation/ - name: Congress.gov API description: >- The api.congress.gov REST API, maintained by the Library of Congress, exposes structured legislative data — bills, amendments, summaries, members, committees, committee reports, congressional record, nominations, treaties, and congresses. Auth via api.data.gov key. The canonical programmatic feed for the U.S. House and Senate replacing the legacy congress.gov RSS / XML downloads. humanURL: https://api.congress.gov baseURL: https://api.congress.gov/v3 tags: - Federal - Legislative - Congress - Library of Congress - api.data.gov properties: - type: Portal url: https://api.congress.gov - type: Documentation url: https://github.com/LibraryOfCongress/api.congress.gov/ - type: GitHubOrganization url: https://github.com/LibraryOfCongress - type: GitHubRepository url: https://github.com/LibraryOfCongress/api.congress.gov - type: Authentication url: https://api.data.gov/signup/ - name: FEC openFEC API description: >- Federal Election Commission's openFEC REST API at api.open.fec.gov exposes campaign finance data — candidates, committees (PACs, parties, campaigns), filings, contributions, disbursements, independent expenditures, electioneering communications, communication costs, and coverage dates. Auth via api.data.gov key. humanURL: https://www.fec.gov/data/ baseURL: https://api.open.fec.gov/v1 tags: - Federal - FEC - Elections - Campaign Finance - api.data.gov properties: - type: Portal url: https://www.fec.gov/data/ - type: Documentation url: https://api.open.fec.gov/developers/ - type: GitHubOrganization url: https://github.com/fecgov - type: GitHubRepository url: https://github.com/fecgov/openFEC - name: api.weather.gov (NOAA NWS) description: >- National Weather Service REST + JSON-LD API at api.weather.gov delivering open weather forecasts, alerts, and observations. Endpoints include /points/{lat,lon}, /gridpoints/{office}/{x},{y}/forecast, /gridpoints/ .../forecast/hourly, /alerts/active, /alerts, /stations, /products, and /zones. Authentication is User-Agent only — no API key required — and all responses are intended as open data free to use for any purpose. humanURL: https://www.weather.gov/documentation/services-web-api baseURL: https://api.weather.gov tags: - Federal - NOAA - National Weather Service - Weather - Forecast - Alerts - JSON-LD properties: - type: Portal url: https://www.weather.gov/documentation/services-web-api - type: Specification url: https://api.weather.gov/openapi.json - type: GitHubOrganization url: https://github.com/weather-gov - name: api.nasa.gov description: >- Aggregated NASA Open APIs hub at api.nasa.gov. Includes Astronomy Picture of the Day (APOD), Asteroids NeoWs, DONKI (Space Weather), Earth Imagery, EONET (Earth Observatory Natural Event Tracker), EPIC, Exoplanet Archive, Open Science Data Repository, Insight (Mars weather), Mars Rover Photos, NASA Image and Video Library, TechTransfer, Satellite Situation Center, SSD/CNEOS, Techport, TLE API, and Vesta. Auth via api.data.gov key (rate limited per the gateway's tiers). humanURL: https://api.nasa.gov baseURL: https://api.nasa.gov tags: - Federal - NASA - Open Data - Science - api.data.gov properties: - type: Portal url: https://api.nasa.gov - type: GitHubOrganization url: https://github.com/nasa - type: Authentication url: https://api.data.gov/signup/ - name: Census Data API description: >- U.S. Census Bureau Data API at api.census.gov serving approximately 1,784 datasets across major survey programs — Decennial Census, American Community Survey (ACS 1-year and 5-year), Population Estimates Program (PEP), Current Population Survey (CPS), Survey of Income and Program Participation (SIPP), County Business Patterns (CBP), Economic Census, International Trade, and more. API key obtained via Census Bureau registration. humanURL: https://www.census.gov/data/developers.html baseURL: https://api.census.gov/data tags: - Federal - Census - Demographics - ACS - Economic properties: - type: Portal url: https://www.census.gov/data/developers.html - type: Catalog url: https://api.census.gov/data.html - type: SignUp url: https://api.census.gov/data/key_signup.html - type: GitHubOrganization url: https://github.com/uscensusbureau - name: Bureau of Economic Analysis (BEA) API description: >- BEA Data API exposing GDP, national income, personal income, corporate profits, international trade and investment, regional accounts, and industry accounts. JSON and XML responses. API key obtained from BEA registration. humanURL: https://www.bea.gov/tools/ baseURL: https://apps.bea.gov/api/data tags: - Federal - BEA - Economic Statistics - GDP properties: - type: Portal url: https://www.bea.gov/tools/ - type: Documentation url: https://apps.bea.gov/api/_pdf/bea_web_service_api_user_guide.pdf - name: OpenStates API (Plural Policy) description: >- OpenStates v3 REST API at v3.openstates.org, operated by Plural Policy, providing JSON access to U.S. state legislative information — bills, people (legislators and governors), jurisdictions, committees, and events across all 50 states, D.C., and territories. Authentication via X-API-KEY header or apikey query parameter. The legacy v2 GraphQL endpoint is deprecated. humanURL: https://openstates.org baseURL: https://v3.openstates.org tags: - State - Civic Tech - Legislative - Bills - Plural Policy properties: - type: Portal url: https://openstates.org - type: Documentation url: https://docs.openstates.org/api-v3/ - type: GitHubOrganization url: https://github.com/openstates - type: GitHubRepository url: https://github.com/openstates/openstates-scrapers - name: GovTrack description: >- GovTrack.us civic-tech site tracking U.S. Congress — bills, votes, members, committees, congressional districts. Originally one of the first civic-tech APIs; today its bulk data downloads at govtrack.us/data and its scraper pipeline at github.com/govtrack/congress remain widely reused even as the public REST API has been wound down in favor of api.congress.gov and bulk downloads. humanURL: https://www.govtrack.us baseURL: https://www.govtrack.us/api/v2 tags: - Federal - Civic Tech - Congress - Bills - Votes properties: - type: Portal url: https://www.govtrack.us - type: BulkData url: https://www.govtrack.us/data/ - type: GitHubOrganization url: https://github.com/govtrack - type: GitHubRepository url: https://github.com/govtrack/congress - name: Open Civic Data description: >- Open Civic Data is a community-maintained set of specifications and shared identifiers for civic information — Open Civic Data Division Identifiers (OCD-IDs) for political geographies, plus normalized models for jurisdictions, organizations, people, posts, memberships, bills, votes, and events. Underlies OpenStates' scrapers, Google's Civic Information API, and many state/local civic data pipelines. humanURL: https://opencivicdata.readthedocs.io tags: - Civic Tech - Standards - Identifiers - OCD-ID - Jurisdictions properties: - type: Documentation url: https://opencivicdata.readthedocs.io - type: GitHubOrganization url: https://github.com/opencivicdata - type: GitHubRepository url: https://github.com/opencivicdata/ocd-division-ids - type: Specification url: https://github.com/opencivicdata/docs.opencivicdata.org - name: Socrata Open Data API (Tyler Data and Insights) description: >- Socrata Open Data API (SODA) is the read/write JSON API powering open data portals at federal, state, county, and city governments worldwide. Queries use SoQL (Socrata Query Language), responses are JSON/CSV/GeoJSON, and write operations require an OAuth token. App tokens (free, no auth) raise per-IP throttles. Socrata was acquired by Tyler Technologies in 2018 and now operates as the Data and Insights division — the same platform under new branding. humanURL: https://dev.socrata.com baseURL: https://{domain}/resource/{datasetId}.json tags: - State - Local - Federal - Open Data - Socrata - Tyler Technologies properties: - type: Portal url: https://dev.socrata.com - type: Documentation url: https://dev.socrata.com/docs/endpoints.html - type: GitHubOrganization url: https://github.com/socrata - type: QueryLanguage url: https://dev.socrata.com/docs/queries/ - name: Tyler Technologies description: >- Largest U.S. vendor of mission-critical software to state and local government. Product portfolio spans Courts & Justice (case management, e-filing, jury management, prosecution), Enterprise Resource Planning (financials, HR, revenue, utilities), Public Safety (CAD, records management, citation management, fire & EMS), Civic Services (permitting, licensing, asset management, community development), Property & Assessment (appraisal, tax billing, CAMA), K-12 Schools, Outdoor Recreation (campground reservations, hunting/fishing licensing), and Data & Insights (the former Socrata business). Counterparty for the majority of state and county-level government IT in the U.S. humanURL: https://www.tylertech.com tags: - State - Local - Vendor - Courts - ERP - Public Safety properties: - type: Portal url: https://www.tylertech.com - type: Products url: https://www.tylertech.com/products - type: Developer url: https://dev.socrata.com - name: OpenGov description: >- OpenGov sells a cloud ERP, budgeting, financial-reporting, permitting, licensing, and procurement suite to U.S. state and local governments. Originally a Sunlight Foundation spinout, OpenGov has consolidated legacy financial systems for municipalities, counties, and special districts. The OpenGov ERP Cloud is the company's flagship offering. humanURL: https://www.opengov.com tags: - State - Local - Vendor - ERP - Budgeting - Permitting - Procurement properties: - type: Portal url: https://www.opengov.com - type: Products url: https://www.opengov.com/products - name: API Evangelist Federal Agencies Roundup description: >- Kin Lane's 2026-05-05 roundup at apievangelist.com indexes 211 U.S. federal agencies and their public-facing APIs, RSS feeds, open-data surfaces, and referenced internal systems. Each agency has its own api-evangelist GitHub repo with apis.yml, controlled vocabulary, and where applicable OpenAPI specs. This public-sector topic repo serves as the umbrella catalog binding those agency profiles to the broader federal / state / local / civic-tech landscape. humanURL: https://apievangelist.com/2026/05/05/a-roundup-of-us-federal-agencies-and-their-apis/ tags: - Federal - Roundup - API Evangelist - Catalog properties: - type: Post url: https://apievangelist.com/2026/05/05/a-roundup-of-us-federal-agencies-and-their-apis/ - type: GitHubOrganization url: https://github.com/api-evangelist # Artifacts produced for this topic repo artifacts: - type: JSONSchema url: ./json-schema/public-sector-agency-schema.json - type: JSONSchema url: ./json-schema/public-sector-dataset-schema.json - type: JSONSchema url: ./json-schema/public-sector-regulation-schema.json - type: JSONStructure url: ./json-structure/public-sector-agency-structure.json - type: JSONStructure url: ./json-structure/public-sector-dataset-structure.json - type: JSONStructure url: ./json-structure/public-sector-regulation-structure.json - type: JSONLD url: ./json-ld/public-sector-context.jsonld - type: Vocabulary url: ./vocabulary/public-sector-vocabulary.yml - type: Example url: ./examples/public-sector-agency-example.json - type: Example url: ./examples/public-sector-dataset-example.json - type: Example url: ./examples/public-sector-regulation-example.json include: [] maintainers: - FN: Kin Lane email: info@apievangelist.com url: https://apievangelist.com