posture · 0.7 posture

Public APIs

Score 30.1 / 100 1173 providers +20 via APIs 21 APIs Search apis.io →

Variants seen in the corpus: Public APIPublic APIs

Providers using this tag (1173)

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

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

Massive (formerly Polygon.io)FinanceFintechMarket DataStocks7 APIs75.8 MailboxlayerEmailEmail VerificationSMTPMX Records2 APIs68.9 KrakenKrakenCryptocurrencyExchangeTrading24 APIs68.0 OpenSanctionsSanctions ScreeningAMLPolitically Exposed PersonsCompliance1 API67.9

Strong 18 Solid coverage with minor gaps

ShodanSecuritySearchInternetDevices5 APIs64.4 IPinfoIP IntelligenceIP GeolocationASNPrivacy Detection1 API64.1 positionstackGeocodingReverse GeocodingMapsLocation1 API62.4 OpenWeatherMapWeatherForecastClimateAir Pollution12 APIs61.9 GeekflareDevelopmentWeb ScrapingSearch1 API61.5 Last.fmMusicAudioScrobblingRecommendations2 APIs61.1 WebScraping.AIWeb ScrapingData ExtractionProxiesArtificial Intelligence1 API60.0 GZW Data APIGamingVideo Gamesgray-zone-warfareGame Data1 API59.7 MediastackNewsNews AggregationMediaAPILayer1 API59.7 GreyNoise IntelligenceSecurityThreat IntelligenceCybersecurityIP Reputation1 API58.4 TVmazeVideoTelevisionStreamingSchedule2 APIs57.0 CurrencylayerCurrency ExchangeForeign ExchangeFXForex1 API56.4 WordnikDictionariesDictionaryWord DataEnglish1 API56.0 FlickrPhotographyPhotosSocial Media2 APIs55.2 TraktVideoMoviesTelevisionMedia Tracking1 API55.2 ImgurPhotographyImageImage HostingAlbums1 API54.6 ExchangeRate-APICurrency ExchangeForeign ExchangeFinancial DataForex4 APIs54.4 CalendarificCalendarHolidaysWorldwide1 API54.3

Developing 36 Usable, with meaningful gaps to close

WakaTimeDeveloper ProductivityDeveloper ToolsTime TrackingCoding Analytics20 APIs54.0 FixerCurrency ExchangeForeign ExchangeFXForex1 API53.5 EmailRepSecurityEmailEmail ReputationThreat Intelligence1 API52.9 SpoonacularRestaurantFood and BeverageRecipesNutrition1 API52.9 Checkiday - National Holiday and Event APICalendarHolidaysEventObservances1 API52.1 ScryfallMagic The GatheringCard DataOpen DataFree1 API52.0 AbuseIPDBAnti MalwareBlacklistCybersecurityIP Reputation1 API51.5 IPGeolocation.ioGeocodingIP GeolocationIP IntelligenceIP Security7 APIs51.1 TheTVDBEntertainmentMoviesTelevisionMedia Metadata1 API50.4 MockarooTest DataMock DataAPI MockingData Generation1 API50.3 arXivScholarly PublishingPreprintsOpen AccessResearch2 APIs48.1 WiktionaryDictionariesOpen SourceWikimediaMediaWiki11 APIs47.3 HypixelGamingMinecraftPlayer StatsLeaderboards2 APIs46.8 Wikipedia / MediaWikiOpen DataOpen KnowledgeEncyclopedia2 APIs46.6 IMDb-APIVideoMoviesTVEntertainment1 API46.0 REST CountriesCountriesGeocodingGeographyISO 31661 API46.0 WeatherAPIWeatherForecastHistoryMarine1 API45.9 DatamuseWord FindingLexical SearchNatural-LanguageVocabulary1 API45.8 WgerFitnessNutritionHealth1 API45.6 IPstackGeocodingIP GeolocationLocationThreat Intelligence2 APIs45.4 OpenUVWeatherUV IndexSunSolar1 API45.2 NominatimGeocodingOpenStreetMapMapsLocation Services1 API44.8 FinageFinanceMarket DataStocksForex1 API44.2 AniListAnimeMangaEntertainmentMedia3 APIs43.0 NewMinecraftServersMinecraftGamingserver-directoryGame Servers2 APIs42.6 Radio BrowserMusicRadioStreamingOpen Source1 API42.5 DiscogsMusicMarketplaceCatalogCommunity8 APIs42.0 MarketAuxNewsFinancial NewsStock MarketSentiment Analysis1 API42.0 NutritionixRestaurantHealthNutritionFood4 APIs41.2 chucknorris.ioEntertainmentJokesChuck NorrisOpen Source2 APIs41.1 GutendexBooksCatalogEbooksLibrary1 API41.0 FoodData CentralHealth1 API40.9 Wolfram|AlphaArtificial IntelligenceComputational KnowledgeMachine LearningNatural Language Processing2 APIs40.1 ipifyDevelopmentIP AddressGeolocationIP Intelligence3 APIs39.7 Orion HealthHealth4 APIs39.4 Noun ProjectIconsSVGVisual LanguageDesign Assets5 APIs39.3

Thin 30 Limited public surface area

7digitalMusicStreamingLicensingCatalogue23 APIs38.5 Tomorrow.ioWeatherClimateForecastHistorical Weather11 APIs38.5 EdamamFood and BeverageRecipesNutritionDiet4 APIs38.3 Aviation Weather CenterAviationWeatherGovernmentNOAA1 API37.6 FrankfurterCurrency ExchangeForeign ExchangeFXOpen Source2 APIs37.2 GeniusMusicLyricsAnnotationCrowdsourced9 APIs37.1 Punk APIFood and BeverageBeerBrewDogDIY Dog1 API37.0 FREDFinanceGovernmentEconomic DataFederal Reserve10 APIs36.7 Nasdaq Data LinkFinancial DataStock MarketMarket DataEconomic Data3 APIs36.5 4chanSocialBulletin BoardImageboardRead Only6 APIs35.3 RijksmuseumMuseumsCultural HeritageOpen DataLinked Data5 APIs34.7 Ron Swanson QuotesEntertainmentTelevisionParks and RecreationQuotes1 API34.4 Fortnite TrackerFortnitePlayer StatisticsEsports5 APIs33.7 WikivoyageTravelOpen DataOpen Knowledge9 APIs33.4 Art Institute of ChicagoMuseumsOpen DataCultural HeritageIIIF1 API33.2 Studio GhibliAnimeStudio GhibliFilmCharacters5 APIs32.7 Quote GardenQuotesInspirationOpen SourceFree API1 API31.4 JokeAPIJokesHumorEntertainmentOpen Source3 APIs31.0 The Holistic Care — THC Open Mindfulness APIMindfulnessEducationHealthOpenAPI1 API30.9 Random User GeneratorTest DataSynthetic DataMock DataOpen Source1 API30.6 ApivaultAPI CatalogAPI DirectoryAPI DiscoveryOpen Source1 API30.3 GamerPowerGiveawaysFree GamesGaming3 APIs30.3 Superhero API (akabab)SuperheroesComic BooksOpen SourceStatic API1 API29.6 ISS Location API (Open Notify)SpaceISSInternational Space StationNASA1 API29.3 jServiceTriviaJeopardyOpen SourceRuby1 API28.9 Bored APIActivitiesBoredomCommunityDevelopment2 APIs28.5 Open Trivia DatabaseTriviaQuizOpen Data4 APIs27.6 YGOPRODeckGamesTrading Card GamesYu Gi OhCard Database5 APIs27.6 MojangMinecraftGamingIdentityPlayer Profiles14 APIs26.3 SWAPI - Star Wars APIStar WarsOpen SourceTeaching API7 APIs26.3

Emerging 27 Early or largely undocumented

Minimal 1058 Almost no public developer surface

Showing the top 1,000 of 1,058 by rating. See them all →

APIs with this tag (20)

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 2 Complete, well-documented, and agent-ready

Plunk Public APIPublic API endpoints for sending emails and tracking events75.1 ControlUp Public APIThe Public API API from ControlUp — 11 operation(s) for public api.75.0

Strong 3 Solid coverage with minor gaps

Postiz Public APIThe Public API API from Postiz — 22 operation(s) for public api.66.4 Facets Public APIs APIThe public-ap-is API from Facets — 20 operation(s) for public-ap-is.61.5 EventX Public APIThe Public Api API from EventX — 5 operation(s) for public api.56.0

Developing 8 Usable, with meaningful gaps to close

SYNTHORA Live World Map APIPublic, credential-free JSON behind the mundo.hergertsynthora.com 3D globe: GET /mapstate returns the live ...48.5 Alteryx Gallery APIAPI for interacting with Alteryx Analytics Gallery for workflow sharing and execution.47.7 ShareThis Social Share Count APIPublic, unauthenticated GET endpoint returning aggregate social sharing metrics for any URL — clicks and sh...47.1 Keboola Public APIUnauthenticated read access to published apps and vendors.42.6 Nace Ai Public APIThe public-api API from Nace Ai — 12 operation(s) for public-api.42.2 Develop Health Public APIThe public-api API from Develop Health — 15 operation(s) for public-api.42.1 RubyGems.org Registry API v2Version 2 of the rubygems.org registry API. Adds gem version detail endpoints with optional platform query ...40.8 Contra Public ApiThe Public Api API from Contra — 3 operation(s) for public api.39.5

Thin 6 Limited public surface area

UK Open Banking Open Data APIPublic-facing APIs enabling third-party developers to access standardized open data published by Account Se...39.2 Thordata Public APIThe Public API API from Thordata — 1 operation(s) for public api.38.2 Clean Harbors Careers Job Query APIUnauthenticated JSON API over Clean Harbors' open positions, served from the company's own careers host and...36.0 Netsmart CareConnect Payer Provider Directory APIPublicly accessible FHIR R4 API for discovering healthcare providers, organizations, locations, services, a...35.7 Netsmart CareConnect Service Base URLs APIPublic endpoint returning an HL7 FHIR R4 Bundle of Organization and Endpoint resources that describe all av...35.7 Proof of Play Public APIThe Public API API from Proof of Play — 1 operation(s) for public api.33.9

Emerging 1 Early or largely undocumented

Recruitee Careers Site APIPublic, read-only API used by careers sites and embedded job widgets to fetch published offers, departments...21.3

Companies reaching this through an API (20)

These companies publish an API, specification or operation carrying “Public APIs” 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.

Score breakdown

Frequency

72.8

log-scaled weighted occurrences

Breadth

6.9

spread across providers

Quality lift

19.8

mean composite of providers using it

Cohesion

41.2

strength of nearest seed neighbor

Where this tag comes from

Provider tag1173

Api tag20

Openapi tag9

Openapi op tag63

Cohort brief

Auto-generated

The 1024 providers in the APIs.io catalog tagged Public APIs, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers

1024

all scored

Mean Kin Score

8.8

-14.1 vs catalog 22.9

Mean Agent Readiness

3.2

-8.7 vs catalog 11.9

Spread

0–75.8

median 5.1 · σ 11.9

How the 1024 split by band

Exemplar 4Strong 18Developing 36Thin 30Emerging 27Minimal 909

Facet averages, against the whole catalog

Facet	This cohort	Catalog	Difference	Scored
Contract Governance	2.5	6.3	-3.8	1024
Discoverability	49.1	58.1	-9	1024
Operational Transparency	2.8	13.7	-10.9	1024
Developer Ergonomics	10.8	23.2	-12.4	1024
Contract Quality	5.1	17.6	-12.5	1024
Access Clarity	4.2	26.5	-22.3	1024

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)	4%	14%	-10
MCP server (first-party)	4%	12%	-8
Agent Skills	0%	0%	0
OAuth scopes	1%	11%	-10
Security	100%	98%	+2
Arazzo workflows	1%	2%	-1
Governance rules	10%	14%	-4

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

1 Massive (formerly Polygon.io) 75.8
2 Mailboxlayer 68.9
3 Kraken 68
4 OpenSanctions 67.9
5 Shodan 64.4
6 IPinfo 64.1
7 positionstack 62.4
8 OpenWeatherMap 61.9
9 Geekflare 61.5
10 Last.fm 61.1

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/public-apis"

All tags

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

As a scored cohort

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

The distribution (Pro)

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

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