Reference
Providers using this tag (6)
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Developing 1 Usable, with meaningful gaps to close
Thin 3 Limited public surface area
Minimal 2 Almost no public developer surface
APIs with this tag (66)
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 3 Complete, well-documented, and agent-ready
Strong 12 Solid coverage with minor gaps
API Evangelist Reference APIThe API vocabulary and the static machine-readable feeds.Microsoft .NET API BrowserComprehensive reference for .NET APIs across all packages, namespaces, and types in the .NET ecosystem incl...APITube Reference APIThe Reference API from APITube — 7 operation(s) for reference.Numbers Online Phone Intelligence APIOne REST API over a single E.164 primitive: parse and validate numbers, single and bulk lookup (line type, ...Zocdoc Reference APIEndpoints to retrieve information about the developer's directory.x402 List API Reference APIReference data: supported networks, categories, and service tagsAviation Edge Reference APIStatic reference dataDeveloperHub Reference APIOperations for adding, reading, and publishing API reference specifications.Delft University of Technology Reference APIControlled vocabularies — licenses, categories and depositing groups.Currencycloud Reference APIEasy access to view important data relevant to your Currencycloud account including beneficiary details, co...UpLead Reference APIReference data lookups.fatsecret Reference APIReference data for brands, categories, and exercises
Developing 19 Usable, with meaningful gaps to close
PayMate Reference APIReference dataTemenos Reference APIManage reference data including exchange rates, interest rates, security prices, swap rates, holiday calend...Socialbakers Reference APIManaged profiles, labels, label groups, listening queries, ad accountscrob.at Reference APIRead sample teams and Pokemon reference data.Getty Images Reference APIThe Reference API from Getty Images — 1 operation(s) for reference.Wealth-X Reference APIReference / lookup data used to build searches.Paga Reference APILook-up operations - banks, mobile operators, status.Maxar Technologies MGP Postman CollectionPublic Postman workspace documenting the Maxar Geospatial Platform API surface for quick exploration and te...MNTN Reference APIEnumerations and lookup data shared across endpoints.Moody's Corporation Reference APIOperations for retrieving frequency, vintage, and file type metadataDatabento Reference APIReference and non-price data that complements the market data feeds - a security master (instrument definit...Fortellis AsyncAPI Hello World ReferenceHello World AsyncAPI reference distributed by Fortellis to teach the asynchronous API pattern, channel topo...Climatiq Reference APIReference data such as regions and unit types.Refinitiv Reference APIReference data operations for retrieving profile details and resolution toolkit configurations.FERC Reference APIForm lists and submission constraints.Willo Reference APIRead-only reference data - languages and IDV countries of employment.Rice University Reference APIControlled vocabularies the catalog's fields draw from.Sideko SDK ReferenceBoilerplate code used by Sideko to generate SDKs, including example SDKs that demonstrate the generated sur...Elexon Reference APIReference data which can be used to filter other API requests.
Thin 22 Limited public surface area
Bunny.net Countries APIReference endpoint returning the list of countries Bunny.net supports for geo-targeting in Pull Zone and DN...Bunny.net Regions APIReference endpoint returning the list of Bunny.net edge and storage regions for use in zone configuration.RunSignup Reference APIReference data such as countries and states used across the API.HealthSherpa Reference APIThe Reference API from HealthSherpa — 3 operation(s) for reference.Sample Transactions APIThe State Street Sample Transactions API is a reference and onboarding API provided in the developer portal...One Degree Reference APIProperty types, rating types, and guides.Metals-API Reference APISymbols and reference data.TutorCruncher Reference APIReference data - subjects, countries, categories, action types.Monad JSON-RPC APIFull JSON-RPC method reference — standard Ethereum eth_*, net_*, web3_*, debug_*, and trace_* methods plus ...Wodify Reference APIReference data such as locations, employees, programs, and services.Apache HTTP Server Configuration ReferenceConfiguration directive reference for Apache HTTP Server covering VirtualHost, mod_ssl, mod_rewrite, mod_pr...Claim.MD Reference APIPayer directory, enrollment, appeals, and webhooks.Portcast Reference APISupported carrier SCAC reference data.OpenPrescribing Reference APIBNF code, organisation code and organisation-location reference lookups.Sportsbook API Reference APIThe Reference API from Sportsbook API — 2 operation(s) for reference.Spinwheel Reference APIConstants and vehicle reference data.Foreign Affairs Manual (FAM) and Handbook (FAH)Department-wide policy and procedural manuals issued by the Office of Directives Management.Amiibo API Reference APIReference data endpoints for types, series, characters, and game seriesForex Reference APIThe Reference API from Forex — 1 operation(s) for reference.IGDB Reference APIReference data such as keywords, collections, and franchises.ReDocReDoc is an open-source API documentation renderer for OpenAPI specifications, originally created by Rebill...MCP Reference ServersCanonical collection of reference MCP server implementations maintained by the project. The active servers ...
Emerging 9 Early or largely undocumented
References DHL eCommerce AmericasProvides reference data for products, fields, and glossary information across DHL eCommerce Americas APIs.Chainguard Unified API SpecThe unified Chainguard API specification combines API v1 and v2 definitions in a single reference, useful f...Helium Documentation RepositorySource repository for docs.helium.com, covering the Mobile and IoT networks, tokens, wallets, and network-d...ITU Reference APICountry and region reference data.BICS Reference APIQuery BICS reference data.Lane API Reference APIThe Reference API from Lane API — 4 operation(s) for reference.National Highway Traffic Safety Administration Reference APIReference variables and value listsAave InterfaceOpen-source web interface (app.aave.com) for interacting with the Aave protocol — a reference implementatio...PostEx Reference APIOperational cities and merchant address reference data
Minimal 1 Almost no public developer surface
Companies reaching this through an API (65)
These companies publish an API, specification or operation carrying “Reference” 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.
Aave
Amiibo API
Apache HTTP Server
API Evangelist
APITube
Aviation Edge
BICS
Bunny.net
CDK Global
Central Intelligence Agency
Chainguard
Claim.MD
Clarivate
Climatiq
Containerfile
crob.at
Currencycloud
Databento
Delft University of Technology
Department of State
DeveloperHub
DHL
Elexon
Emplifi
fatsecret
FERC
Forex
Getty Images
HealthSherpa
Helium Network
IGDB
ITU
Lane API
Massive (formerly Polygon.io)
Metals-API
Microsoft .NET
MNTN
Model Context Protocol (MCP)
Monad
Moody's
National Highway Traffic Safety Administration
Numbers Online
One Degree
OpenPrescribing
Paga
PayMate
Portcast
PostEx
Redocly
Refinitiv
Show all 65 companies ↓
Score breakdown
Frequency
58.3
log-scaled weighted occurrences
Breadth
0.2
spread across providers
Quality lift
30.7
mean composite of providers using it
Cohesion
2.8
strength of nearest seed neighbor
Related tags
Currency 5 co-occurrences
Reference Data 5 co-occurrences
OpenAPI 6 co-occurrences
Financial Data 5 co-occurrences
Documentation 5 co-occurrences
Services 6 co-occurrences
Collection 6 co-occurrences
CLI 5 co-occurrences
Where this tag comes from
Api tag66
Provider tag6
Openapi tag45
Openapi op tag142
Work with this as data
Every tag here is available over the APIs.io API and to AI agents over MCP.