API Design
Providers using this tag (48)
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Developing 7 Usable, with meaningful gaps to close
Thin 9 Limited public surface area
Emerging 28 Early or largely undocumented
APIs with this tag (31)
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 →
Strong 1 Solid coverage with minor gaps
Developing 2 Usable, with meaningful gaps to close
Thin 4 Limited public surface area
Stoplight PlatformStoplight Platform is a SaaS collaborative API design and documentation management tool providing a visual ...Stoplight StudioStoplight Studio is the visual API design and technical writing editor included in the Stoplight Platform. ...Apicurio StudioApicurio Studio is a visual, zero-code API design tool for creating and editing OpenAPI and AsyncAPI specif...Stoplight APIAPI design-first platform enabling teams to write API specifications before implementation, supporting test...
Emerging 24 Early or largely undocumented
Fern Definition and CLICapability area covering Fern's open-source (Apache-2.0) command-line interface and the proprietary Fern De...API BlueprintAPI Blueprint is a high-level API design language created by Apiary for designing and documenting web APIs....Apiary APIThe Apiary API provides programmatic access to manage API projects, documentation, and team collaboration. ...TypeSpec CompilerThe TypeSpec compiler processes `.tsp` TypeSpec files and emits output for configured emitters (OpenAPI, JS...RAML SpecificationThe RAML (RESTful API Modeling Language) specification defines a YAML 1.2-based language for describing HTT...Smithy IDLThe Smithy Interface Definition Language (IDL) is a specification for defining API models using shapes and ...Header-Based VersioningHeader-based versioning passes the API version in a custom HTTP request header (e.g., API-Version: 2026-04-...URI Path VersioningURI path versioning embeds the API version in the URL path, typically as the major version number (e.g., /v...SpectralSpectral is a flexible JSON/YAML linter and style guide enforcer with built-in support for OpenAPI (v3.1, v...SpecLynxStop wrestling with OpenAPI specs. SpecLynx OpenAPI Toolkit delivers the most effective way to author and m...SpecLynx ApiDOMA unified semantic parsing engine that underpins all SpecLynx products. ApiDOM parses OpenAPI, AsyncAPI, Ar...SpecLynx EditorA browser-based OpenAPI editor with real-time validation, smart autocompletion, and live preview. No instal...SpecLynx Language ServiceAn LSP-compatible npm library (@speclynx/apidom-ls) providing 13 intelligent editing capabilities for API d...SpecLynx OpenAPI ToolkitA VS Code extension providing semantic editing, real-time validation, linting, and live preview for OpenAPI...Swagger EditorSwagger Editor is a browser-based editor for writing and validating OpenAPI and AsyncAPI specifications wit...Swagger EditorSwagger Editor is an open-source web-based editor for designing OpenAPI specifications that double as test ...APIwizAPIwiz is a low-code, end-to-end API management platform enabling the complete API lifecycle including desi...JSON:APIJSON:API is a specification for how a client should request that resources be fetched or modified, and how ...OpenAPI SpecificationThe OpenAPI Specification (OAS) defines a standard, language-agnostic interface to RESTful APIs which allow...API BlueprintAPI Blueprint is a high-level API description language using Markdown-based syntax for designing, documenti...TypeSpecTypeSpec (formerly Cadl) is a language for describing API shapes developed by Microsoft. TypeSpec definitio...Stoplight StudioStoplight's API design IDE embeds Spectral natively, surfacing ruleset violations as real-time editor feedb...Jargon PlatformJargon's collaborative modelling platform for designing, governing, and scaling domain models with generati...API Insights AnalysisAPI Insights analyzes OpenAPI specifications (OAS v3, JSON or YAML) and produces detailed scorecards across...
Score breakdown
Frequency
50.8
log-scaled weighted occurrences
Breadth
1.3
spread across providers
Quality lift
31.3
mean composite of providers using it
Cohesion
15.2
strength of nearest seed neighbor
Related tags
API Lifecycle 8 co-occurrences
OpenAPI 27 co-occurrences
JSON-Schema 8 co-occurrences
API Governance 7 co-occurrences
API Testing 10 co-occurrences
AsyncAPI 9 co-occurrences
Mock Servers 5 co-occurrences
API Documentation 6 co-occurrences
Where this tag comes from
Provider tag43
Api tag31
Cohort brief
Auto-generatedThe 48 providers in the APIs.io catalog tagged API Design, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.
Providers
48
all scored
Mean Kin Score
26
+5.3 vs catalog 20.7
Mean Agent Readiness
10.8
+1.1 vs catalog 9.7
Spread
8.7–64.5
median 20.1 · σ 13.7
How the 48 split by band
Exemplar 0Strong 2Developing 7Thin 9Emerging 28Minimal 2
Facet averages, against the whole catalog
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Contract Quality | 27.7 | 17.5 | +10.2 | 48 |
| Contract Governance | 14.9 | 6.4 | +8.5 | 48 |
| Operational Transparency | 18.3 | 11.3 | +7 | 48 |
| Discoverability | 64.3 | 60.4 | +3.9 | 48 |
| Developer Ergonomics | 20.6 | 17.9 | +2.7 | 48 |
| Access Clarity | 22.2 | 22.3 | -0.1 | 48 |
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) | 10% | 16% | -6 |
| MCP server (first-party) | 2% | 7% | -5 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 2% | 9% | -7 |
| Security | 96% | 88% | +8 |
| Arazzo workflows | 8% | 2% | +6 |
| Governance rules | 67% | 13% | +54 |
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
All 48 members of this roster resolve to a scored provider in
the catalog.Generated from the catalog build of
25 August 2026, across 26891
providers, using the same computation served by the
APIs.io cohort API. Briefs are published for rosters of
5 or more scored providers; below that a distribution is not meaningful.
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.
Call it yourself
curl for this page
This tag
curl "https://apis.io/api/v1/tags/api-design"
All tags
curl "https://apis.io/api/v1/tags?limit=25"
As a scored cohort
curl "https://apis.io/api/v1/cohorts/tag/api-design"
The distribution (Pro)
curl "https://apis.io/api/v1/cohorts/tag/api-design/stats" \
-H "X-API-Key: $APIS_IO_KEY"Discovery needs no key. Ratings and market analysis are Pro.