canonical · -2.7 capability

Open Data

Score 33.7 / 100 572 providers +75 via APIs 527 APIs Search apis.io →

Providers using this tag (572)

Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.

Exemplar 4 Complete, well-documented, and agent-ready

OpenSanctionsSanctions ScreeningAMLPolitically Exposed PersonsCompliance1 API67.9 OpenMercantilBDNSBORMEBusiness RegistryCIF3 APIs79.0 publiqCompanyCultureEventLeisure10 APIs71.5 EnturCompanyPublic TransportJourney PlanningMobility37 APIs69.6

Strong 23 Solid coverage with minor gaps

Open Food FactsFoodNutritionProduct Data8 APIs64.5 EPA — U.S. Environmental Protection AgencyGovernmentEnvironmentalAir Quality22 APIs57.0 UK Power NetworksEnergyUnited KingdomUtilitiesElectricity2 APIs61.7 University of WaterlooEducationHigher EducationUniversity1 API61.3 La Poste GroupeCompanyLogisticsShippingPackage Tracking4 APIs60.5 Electricity North WestEnergyUnited KingdomUtilitiesElectricity2 APIs59.6 SirenicCompany DataBusiness RegistryKYBSanctions Screening1 API58.5 BarclaysBankingCredit CardsFAPIFinance52 APIs57.9 Tandoor RecipesRecipesMeal PlanningFoodNutrition1 API57.8 DietlyAPIFoodNutritionBarcodesopen-food-facts1 API57.5 EquinorCompanyEnergyOil and GasRenewables16 APIs57.2 Consumer Data Right (Energy)EnergyAustraliaUtilitiesElectricity6 APIs57.1 Plinth US Grants DataPhilanthropyGrantsNon-ProfitFoundations1 API57.0 General Services AdministrationFederal GovernmentProcurementAcquisition21 APIs56.9 Open Government, New South WalesGovernmentPublic APIsAustralia6 APIs56.7 GZW Data APIGamingVideo Gamesgray-zone-warfareGame Data1 API56.0 flatin.ptReal EstateProperty TaxTaxIMI1 API55.6 FlightFinderAviationAviation SafetyAccident Data1 API55.2 FindLocalEventHyperlocalCommunityData2 APIs55.1 Red EnergyEnergyAustraliaUtilitiesElectricity2 APIs55.0 Endeavour EnergyEnergyAustraliaUtilitiesElectricity2 APIs54.9 Northern PowergridEnergyUnited KingdomUtilitiesElectricity2 APIs54.8 Ordnance SurveyReal EstateUnited KingdomLand RegistryGeospatial10 APIs54.4

Developing 71 Usable, with meaningful gaps to close

Thin 149 Limited public surface area

Emerging 104 Early or largely undocumented

Minimal 221 Almost no public developer surface

APIs with this tag (526)

Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →

Exemplar 1 Complete, well-documented, and agent-ready

Remote online notarization requirements by U.S. jurisdictionStatute-cited remote online notarization requirements for all 50 U.S. states and the District of Columbia: ...66.6

Strong 10 Solid coverage with minor gaps

Amber Electric Consumer Data Right Energy APIAmber's Consumer Data Right energy data-holder surface, mandated by the Australian CDR regime extended from...64.2 University of Waterloo Dataverse Collection (Borealis)Waterloo's named research-data collection on Borealis, the Canadian consortial Dataverse repository operate...61.3 Second Life Live Data FeedsAnonymous, unauthenticated feeds publishing live Second Life grid statistics (grid status, total registered...60.4 Consumers Energy Outage Map ArcGIS REST APIConsumers Energy publishes its outage map data as an anonymous Esri ArcGIS Server 11.5 REST Services Direct...55.3 Northern Powergrid Open Data Search API v1The original Opendatasoft Search API, still live on the portal and still carrying its own interactive conso...54.8 Con Edison Hosting Capacity Map REST APICon Edison's distribution-grid open data, published as anonymously readable Esri ArcGIS REST feature servic...54.4 Ordnance Survey Open Data APIOperations providing access to OpenData products.54.4 AEMO NEM Data Dashboard APIThe JSON API behind AEMO's public National Electricity Market data dashboard, and the closest thing AEMO op...54.3 AEMO NEMWeb Public Data FeedNEMWeb is AEMO's open bulk-data channel for the National Electricity Market and the single largest genuinel...54.3 AEMO WA Market Data Public FeedThe Western Australian equivalent of NEMWeb, covering the Wholesale Electricity Market that AEMO operates s...54.3

Developing 78 Usable, with meaningful gaps to close

Thin 109 Limited public surface area

Emerging 122 Early or largely undocumented

Minimal 206 Almost no public developer surface

Companies reaching this through an API (75)

These companies publish an API, specification or operation carrying “Open Data” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.

Accela AEMO AESO Air France-KLM Alcohol and Tobacco Tax and Trade Bureau Amber Electric AmeriCorps Arizona State University arXiv BBVA BMW BrightAI Bureau of Consular Affairs Bureau of Indian Affairs CenterPoint Energy Chief Financial Officers Council CMS Energy CNCF Con Edison Coutts Deakin University Department of Energy Department of State DuckDuckGo ENMAX Erasmus University Rotterdam Farm Service Agency Federal Housing Finance Agency (FHFA) Federal Student Aid Hampden & Co Harvard University Hergert Synthora King's College London Kyushu University Linden Lab Lyft McGill University McMaster University MISO Nagoya University National Council on Disability National Institute of Standards and Technology (NIST) Pod Point Queen's University at Kingston Refinitiv Eikon Shipping.com SignSealShip Partner API Small Business Administration (SBA) Sorbonne University Stanford University

Show all 75 companies ↓

StatsBomb (Hudl) Surge AI Technical University of Munich UCL UK Open Banking University of Barcelona University of Birmingham University of California, Los Angeles University of Chile University of Florida University of Manchester University of Michigan-Ann Arbor University of Reading University of Southern California University of the Witwatersrand University of Toronto University of Waikato Université de Montréal USAID Vantor Voi Washington University in St. Louis Western University Wuhan University Zillow Group

Score breakdown

Frequency

81.0

log-scaled weighted occurrences

Breadth

12.8

spread across providers

Quality lift

24.7

mean composite of providers using it

Cohesion

35.7

strength of nearest seed neighbor

Where this tag sits

572 providers carry this tag directly, and 613 counting the 2 narrower tags below and the 3 beneath them — 41 more to reach.

Data Catalog 214 providers Government Data 208 providers

Where this tag comes from

Provider tag575

Api tag527

Openapi tag2

Openapi op tag5

Markets provisional

Kin Score markets whose measured providers carry this tag. Share is the fraction of the market's measured providers that carry it — it describes the market, not this tag.

Market	Share of the market's providers
Open Data Portals (CKAN / DCAT)	95%
Government and Open Data	62%
IIIF and Cultural Heritage (GLAM image interoperability, Linked Art)	32%
Higher Education and Research	31%
US Federal API Programs (api.data.gov, Login.gov, GSA MAS, FedRAMP)	29%

Cohort brief

Auto-generated

The 566 providers in the APIs.io catalog tagged Open Data, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers

566

of 572 in the catalog

Mean Kin Score

23.8

+1.6 vs catalog 22.2

Mean Agent Readiness

14.5

+2.5 vs catalog 12

Spread

3.4–79

median 23 · σ 15.7

How the 566 split by band

Exemplar 4Strong 23Developing 71Thin 149Emerging 104Minimal 215

Facet averages, against the whole catalog

Facet	This cohort	Catalog	Difference	Scored
Discoverability	64.7	57.9	+6.8	566
Contract Quality	23.6	17.2	+6.4	566
Developer Ergonomics	25.2	23.2	+2	566
Contract Governance	8.4	6.5	+1.9	566
Operational Transparency	14.1	13	+1.1	566
Access Clarity	15.8	23.9	-8.1	566

A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.

What this cohort publishes

Artifact	This cohort	Catalog	Difference
MCP server (any)	5%	13%	-8
MCP server (first-party)	5%	12%	-7
Agent Skills	0%	0%	0
OAuth scopes	12%	11%	+1
Security	99%	98%	+1
Arazzo workflows	2%	2%	0
Governance rules	28%	16%	+12

mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.

Top by Kin Score

Work with this as data

Every tag here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for tags

7 MCP tools reach this

find_tagsBrowse and filter every tag in the catalog.
get_cohortThis tag as a scored cohort — every provider carrying it, with scores.
cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.
cohort_rankingsPRO — the leaderboard, on composite AND agent-readiness axes.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This tag

curl "https://apis.io/api/v1/tags/open-data"

All tags

curl "https://apis.io/api/v1/tags?limit=25"

As a scored cohort

curl "https://apis.io/api/v1/cohorts/tag/open-data"

The distribution (Pro)

curl "https://apis.io/api/v1/cohorts/tag/open-data/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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