Reference
Business capabilities this tag reaches
Developer Platform & API Ecosystem Management 1
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 1 Limited public surface area
Emerging 2 Early or largely undocumented
Minimal 2 Almost no public developer surface
APIs with this tag (74)
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 11 Solid coverage with minor gaps
Microsoft .NET API BrowserComprehensive reference for .NET APIs across all packages, namespaces, and types in the .NET ecosystem incl...Massive (formerly Polygon.io) Reference APIReference APICurrencycloud Reference APIEasy access to view important data relevant to your Currencycloud account including beneficiary details, co...APITube Reference APIThe Reference API from APITube — 7 operation(s) for reference.Numbers Online Reference APIReference data and examplesZocdoc Reference APIEndpoints to retrieve information about the developer's directory.Paper and Beyond Reference APIThe reference API from Paper and Beyond — 2 operation(s) for reference.Aviation Edge Reference APIStatic reference dataDeveloperHub Reference APIOperations for adding, reading, and publishing API reference specifications.x402 List API Reference APIReference data: supported networks, categories, and service tagsUpLead Reference APIReference data lookups.
Developing 20 Usable, with meaningful gaps to close
PayMate Reference APIReference datafatsecret Reference APIReference data for brands, categories, and exercisesWealth-X Reference APIReference / lookup data used to build searches.Emplifi Reference APIManaged profiles, labels, label groups, listening queries, ad accountsTemenos Reference APIManage reference data including exchange rates, interest rates, security prices, swap rates, holiday calend...Getty Images Reference APIThe Reference API from Getty Images — 1 operation(s) for reference.crob.at Reference APIRead sample teams and Pokemon reference data.MNTN Reference APIEnumerations and lookup data shared across endpoints.Delft University of Technology Reference APIControlled vocabularies — licenses, categories and depositing groups.Telenor Sverige Reference APIThe reference API from Telenor Sverige — 2 operation(s) for reference.Engrate Reference APIThe reference API from Engrate — 2 operation(s) for reference.Refinitiv Reference APIReference data operations for retrieving profile details and resolution toolkit configurations.FERC Reference APIForm lists and submission constraints.Paga Reference APILook-up operations - banks, mobile operators, status.Climatiq Reference APIReference data such as regions and unit types.Maxar Technologies MGP Postman CollectionPublic Postman workspace documenting the Maxar Geospatial Platform API surface for quick exploration and te...Postfinder Reference APIThis document.Sideko SDK ReferenceBoilerplate code used by Sideko to generate SDKs, including example SDKs that demonstrate the generated sur...Databento Reference APIReference and non-price data that complements the market data feeds - a security master (instrument definit...Moody's Corporation Reference APIOperations for retrieving frequency, vintage, and file type metadata
Thin 23 Limited public surface area
Fortellis AsyncAPI Hello World ReferenceHello World AsyncAPI reference distributed by Fortellis to teach the asynchronous API pattern, channel topo...Composabl APIComposabl API as documented publicly: 4 operations. Contract generated from the documentation by API Evange...Composabl Reference APIThe Reference API from Composabl — 4 operation(s) for reference.HealthSherpa Reference APIThe Reference API from HealthSherpa — 3 operation(s) for reference.RunSignup Reference APIReference data such as countries and states used across the API.One Degree Reference APIProperty types, rating types, and guides.Rice University Reference APIControlled vocabularies the catalog's fields draw from.Payer APIPayer API as documented publicly: 33 operations. Contract generated from the documentation by API Evangelis...Payer Reference APIThe Reference API from Payer — 2 operation(s) for reference.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.Willo Reference APIRead-only reference data - languages and IDV countries of employment.Metals-API Reference APISymbols and reference data.Elexon Reference APIReference data which can be used to filter other API requests.Apache HTTP Server Configuration ReferenceConfiguration directive reference for Apache HTTP Server covering VirtualHost, mod_ssl, mod_rewrite, mod_pr...OpenPrescribing Reference APIBNF code, organisation code and organisation-location reference lookups.TutorCruncher Reference APIReference data - subjects, countries, categories, action types.Sportsbook API Reference APIThe Reference API from Sportsbook API — 2 operation(s) for reference.Monad JSON-RPC APIFull JSON-RPC method reference — standard Ethereum eth_*, net_*, web3_*, debug_*, and trace_* methods plus ...Foreign Affairs Manual (FAM) and Handbook (FAH)Department-wide policy and procedural manuals issued by the Office of Directives Management.Forex Reference APIThe Reference API from Forex — 1 operation(s) for reference.MCP Reference ServersCanonical collection of reference MCP server implementations maintained by the project. The active servers ...Portcast Reference APISupported carrier SCAC reference data.
Emerging 16 Early or largely undocumented
IGDB Reference APIReference data such as keywords, collections, and franchises.Wodify Reference APIReference data such as locations, employees, programs, and services.ReDocReDoc is an open-source API documentation renderer for OpenAPI specifications, originally created by Rebill...Claim.MD Reference APIPayer directory, enrollment, appeals, and webhooks.References DHL eCommerce AmericasProvides reference data for products, fields, and glossary information across DHL eCommerce Americas APIs.ITU Reference APICountry and region reference data.Amiibo API Reference APIReference data endpoints for types, series, characters, and game seriesSpinwheel Reference APIConstants and vehicle reference data.Chainguard Unified API SpecThe unified Chainguard API specification combines API v1 and v2 definitions in a single reference, useful f...BICS Reference APIQuery BICS reference data.PostEx Reference APIOperational cities and merchant address reference dataLane API Reference APIThe Reference API from Lane API — 4 operation(s) for reference.National Highway Traffic Safety Administration Reference APIReference variables and value listsHelium Documentation RepositorySource repository for docs.helium.com, covering the Mobile and IoT networks, tokens, wallets, and network-d...Frends Reference APIThe Reference API from Frends — 6 operation(s) for reference.Aave InterfaceOpen-source web interface (app.aave.com) for interacting with the Aave protocol — a reference implementatio...
Minimal 1 Almost no public developer surface
Companies reaching this through an API (69)
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
CDK Global
Central Intelligence Agency
Chainguard
Claim.MD
Clarivate
Climatiq
Composabl
crob.at
Currencycloud
Databento
Delft University of Technology
Department of State
DeveloperHub
DHL
Elexon
Emplifi
Engrate
fatsecret
FERC
Forex
Frends
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
Paper and Beyond
Payer
PayMate
Portcast
Show all 69 companies ↓
Score breakdown
Frequency
58.7
log-scaled weighted occurrences
Breadth
0.1
spread across providers
Quality lift
24.9
mean composite of providers using it
Cohesion
3.2
strength of nearest seed neighbor
Related tags
Currency 5 co-occurrences
History 5 co-occurrences
Reference Data 6 co-occurrences
Financial Data 6 co-occurrences
Schedule 6 co-occurrences
Documentation 6 co-occurrences
OpenAPI 6 co-occurrences
Where this tag comes from
Api tag70
Provider tag6
Openapi tag54
Openapi op tag169
Work with this as data
Every tag here is available over the APIs.io API and to AI agents over MCP.