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

API Evangelist Network APIThe whole network behind one REST API — unified search, 5,100+ posts, 77 topic areas, 2,400+ governance bui...70.2 Zocdoc reference APIEndpoints to retrieve information about the developer's directory.69.5

Strong 10 Solid coverage with minor gaps

Factset Reference APIThe Reference API from Factset — 13 operation(s) for reference.65.5 Vendasta Data Glossary APIThe Data Glossary context: glossary contexts and glossary terms, the vocabulary layer that explains what si...64.8 fatsecret Reference APIReference data for brands, categories, and exercises64.0 Currencycloud Reference APIEasy access to view important data relevant to your Currencycloud account including beneficiary details, co...62.2 UpLead Reference APIReference data lookups.60.1 Databento Reference APIReference and non-price data that complements the market data feeds - a security master (instrument definit...60.0 Paga Reference APILook-up operations - banks, mobile operators, status.58.0 Bloomberg L.P. Reference APIEnumerated values for request and response fields.57.5 Socialbakers Reference APIManaged profiles, labels, label groups, listening queries, ad accounts56.9 Temenos Reference APIManage reference data including exchange rates, interest rates, security prices, swap rates, holiday calend...55.6

Developing 15 Usable, with meaningful gaps to close

FERC eForms XBRL Submission APIThe machine-to-machine API behind FERC's mandated eForms. Credentialed filers exchange their FERC eRegistra...51.5 Wealth-X Reference APIReference / lookup data used to build searches.51.4 Fortellis AsyncAPI Hello World ReferenceHello World AsyncAPI reference distributed by Fortellis to teach the asynchronous API pattern, channel topo...50.6 Climatiq Reference APIReference data such as regions and unit types.48.7 Willo Reference APIRead-only reference data - languages and IDV countries of employment.45.0 Moody's Corporation Reference APIOperations for retrieving frequency, vintage, and file type metadata44.6 Refinitiv Reference APIReference data operations for retrieving profile details and resolution toolkit configurations.43.3 One Degree Reference APIProperty types, rating types, and guides.43.1 Elexon Reference APIReference data which can be used to filter other API requests.42.2 Microsoft .NET API BrowserComprehensive reference for .NET APIs across all packages, namespaces, and types in the .NET ecosystem incl...42.2 Sideko SDK ReferenceBoilerplate code used by Sideko to generate SDKs, including example SDKs that demonstrate the generated sur...41.9 Bunny.net Countries APIReference endpoint returning the list of countries Bunny.net supports for geo-targeting in Pull Zone and DN...41.2 Bunny.net Regions APIReference endpoint returning the list of Bunny.net edge and storage regions for use in zone configuration.41.2 HealthSherpa Reference APIThe Reference API from HealthSherpa — 3 operation(s) for reference.40.7 Monad JSON-RPC APIFull JSON-RPC method reference — standard Ethereum eth_*, net_*, web3_*, debug_*, and trace_* methods plus ...39.4

Thin 21 Limited public surface area

Redocly RedocRedoc is the open-source engine that renders API reference documentation from OpenAPI definitions with a th...39.2 Sample Transactions APIThe State Street Sample Transactions API is a reference and onboarding API provided in the developer portal...38.8 Polygon.io Reference APITicker reference data.37.8 ITU DataHub APIThe undocumented JSON API that serves the ITU DataHub (datahub.itu.int), ITU's official ICT statistics port...37.7 Maxar MGP Postman CollectionPublic Postman workspace documenting the Maxar Geospatial Platform API surface for quick exploration and te...37.2 Wodify Reference APIReference data such as locations, employees, programs, and services.37.1 TutorCruncher Reference APIReference data - subjects, countries, categories, action types.36.6 RunSignup Reference APIReference data such as countries and states used across the API.36.2 OpenPrescribing APIOpenPrescribing API from OpenPrescribing — 19 path(s) described in OpenAPI.35.1 Portcast Reference APISupported carrier SCAC reference data.35.0 Claim.MD Reference APIPayer directory, enrollment, appeals, and webhooks.34.6 Amiibo API Reference APIReference data endpoints for types, series, characters, and game series34.2 Metals-API Reference APISymbols and reference data.34.1 University College Dublin Reference APIThe Reference API from University College Dublin — 2 operation(s) for reference.33.9 Apache HTTP Server Configuration ReferenceConfiguration directive reference for Apache HTTP Server covering VirtualHost, mod_ssl, mod_rewrite, mod_pr...33.1 BNSF Reference Files APIThe Reference Files API from BNSF — 1 operation(s) for reference files.32.7 Sportsbook API Reference APIThe Reference API from Sportsbook API — 2 operation(s) for reference.32.2 Spinwheel Reference APIConstants and vehicle reference data.31.9 IGDB Reference APIReference data such as keywords, collections, and franchises.30.7 References DHL eCommerce AmericasProvides reference data for products, fields, and glossary information across DHL eCommerce Americas APIs.29.8 Aviation Edge Reference APIStatic reference data29.1

Emerging 16 Early or largely undocumented

Getty Images Reference APIThe Reference API from Getty Images — 1 operation(s) for reference.25.9 ReDocReDoc is an open-source API documentation renderer for OpenAPI specifications, originally created by Rebill...25.5 OpticOdds Reference APISports, leagues, sportsbooks, market types.25.2 PostEx Reference APIOperational cities and merchant address reference data24.6 Aave InterfaceOpen-source web interface (app.aave.com) for interacting with the Aave protocol — a reference implementatio...23.6 MCP Reference ServersCanonical collection of reference MCP server implementations maintained by the project. The active servers ...23.1 Forex Reference APIThe Reference API from Forex — 1 operation(s) for reference.22.8 Helium Documentation RepositorySource repository for docs.helium.com, covering the Mobile and IoT networks, tokens, wallets, and network-d...22.7 BICS reference APIQuery BICS reference data.22.5 Chainguard Unified API SpecThe unified Chainguard API specification combines API v1 and v2 definitions in a single reference, useful f...21.8 National Highway Traffic Safety Administration Reference APIReference variables and value lists21.7 Lane API Reference APIThe Reference API from Lane API — 4 operation(s) for reference.21.5 Containerfile ReferenceThe official Containerfile reference shipped with the containers/common project. Documents every Containerf...18.7 Dockerfile ReferenceThe Dockerfile format reference maintained by Docker. Containerfile is a strict superset of Dockerfile, so ...18.7 HAL Reference (Référentiels) APIHAL's reference-data API for querying controlled vocabularies and authorities (authors, structures/labs, jo...18.4 Foreign Affairs Manual (FAM) and Handbook (FAH)Department-wide policy and procedural manuals issued by the Office of Directives Management.15.9

Minimal 1 Almost no public developer surface

CIA World Factbook (Country Profiles)The CIA World Factbook is the long-running unclassified almanac of reference information on 260 world entit...9.1

Score breakdown

Frequency

58.1

log-scaled weighted occurrences

Breadth

1.9

spread across providers

Quality lift

44.4

mean composite of providers using it

Cohesion

3.2

strength of nearest seed neighbor

Where this tag comes from

Api tag60

Provider tag7

Openapi tag42

Openapi op tag150

Reference

Providers using this tag (69)

APIs with this tag (65)

Score breakdown

Related tags

Where this tag comes from