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

  - url: graphql/public-sector-graphql.md
    type: GraphQL
- 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