Public Sector
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.
More than an index entry, but the surface is still mostly links rather than artifacts — the cohort most likely to move a full band from modest, well-targeted work.
API Evangelist profiles Public Sector the way a machine reads it — 34 machine-readable artifacts across 21 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Public Sector scores 23.4/100 (emerging), with a separate agent-readiness read of 3/100 (human only). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-09-08 · rubric v0.20.0
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title="Public Sector on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/public-sector.svg"
alt="Public Sector Kin Score — API readiness rating by API Evangelist" width="150" height="150" loading="lazy">
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title="Public Sector on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/public-sector/card.svg"
alt="Public Sector Kin Score — API readiness rating by API Evangelist" width="340" height="120" loading="lazy">
</a>More shapes, themes and sizes → · Score as JSON · How badges work
How we profile Public Sector
Each block below is one kind of artifact we hold for Public Sector. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 21
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
api.data.gov
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...
data.gov (CKAN catalog)
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 m...
Regulations.gov API
The Regulations.gov v4 REST API exposes federal regulatory dockets, documents (Proposed Rules, Rules, Supporting & Related Material, Other), and public comments. Read endpoints ...
Federal Register API
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), age...
GovInfo API
U.S. Government Publishing Office (GPO) GovInfo developer hub. The Collections API at api.govinfo.gov delivers self-describing packages of authoritative federal content — Congre...
SAM.gov APIs
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 Manag...
USAspending.gov API
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...
Treasury Fiscal Data API
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...
Congress.gov API
The api.congress.gov REST API, maintained by the Library of Congress, exposes structured legislative data — bills, amendments, summaries, members, committees, committee reports,...
FEC openFEC API
Federal Election Commission's openFEC REST API at api.open.fec.gov exposes campaign finance data — candidates, committees (PACs, parties, campaigns), filings, contributions, dis...
api.weather.gov (NOAA NWS)
National Weather Service REST + JSON-LD API at api.weather.gov delivering open weather forecasts, alerts, and observations. Endpoints include /points/{lat,lon}, /gridpoints/{off...
api.nasa.gov
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 Natu...
Census Data API
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-y...
Bureau of Economic Analysis (BEA) API
BEA Data API exposing GDP, national income, personal income, corporate profits, international trade and investment, regional accounts, and industry accounts. JSON and XML respon...
OpenStates API (Plural Policy)
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), ...
GovTrack
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...
Open Civic Data
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 geogr...
Socrata Open Data API (Tyler Data and Insights)
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 Lan...
Tyler Technologies
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...
OpenGov
OpenGov sells a cloud ERP, budgeting, financial-reporting, permitting, licensing, and procurement suite to U.S. state and local governments. Originally a Sunlight Foundation spi...
API Evangelist Federal Agencies Roundup
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...
Scroll within the panel for all 21 ·
GraphQL 1
Where a provider ships GraphQL, the schema is the contract. We profile it alongside the REST surface so the whole interface is legible in one place.
GraphQL schemas published by this provider.
Public Sector GraphQL API
GRAPHQLSemantic Vocabularies 1
JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.
JSON-LD contexts and semantic vocabularies used across these APIs.
Public Sector Context
JSON-LDSpectral Rules 1
Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.
Public Sector API Rules
SPECTRALJSON Schema 3
Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.
Standalone JSON Schema definitions for this provider's data models.
JSON Structure 3
JSON Structure captures the data shapes in a form built for tooling — a complement to JSON Schema that keeps the model machine-legible.
JSON Structure definitions describing this provider's data shapes.
Public Sector Agency Structure
JSON STRUCTUREPublic Sector Dataset Structure
JSON STRUCTUREPublic Sector Regulation Structure
JSON STRUCTUREExamples 3
Real request and response payloads are what turn a spec from abstract into obvious — and they're one of the twelve things an agent needs to call an API correctly on the first try.
Example request and response payloads for these APIs.
Public Sector Agency Example
EXAMPLESecurity Posture 1
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Resources
Every other property we hold for Public Sector — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Documentation 1
Reference material describing how the API behaves
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
← All providers · Data indexed from github.com/api-evangelist/public-sector · machine-readable index on apis.io
This is an independent, third-party profile of Public Sector, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
info@apievangelist.com
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you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.