Public Sector

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: [email protected]
    url: https://apievangelist.com