OpenAPI Initiative website screenshot

OpenAPI Initiative

The OpenAPI Initiative is a Linux Foundation project that promotes the OpenAPI Specification for defining standard, language-agnostic interfaces to RESTful APIs. It provides governance, tooling ecosystem support, and community collaboration for the most widely adopted API description format.

OpenAPI Initiative is listed with 1 API on the APIs.io network. Tagged areas include Linux Foundation, Specification, and Standards.

OpenAPI Initiative’s developer surface includes documentation and 6 more developer resources.

📡 Profile data on GitHub
8.6/100 minimal ▬ flat Agent 1/100 human only Full breakdown ↓
scored 2026-10-23 · rubric v0.25.0 · Show this score on your site →
AccessFreemium
1 API
Linux FoundationSpecificationStandards

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-23 · rubric v0.25.0
Composite quality — 8.6/100 · minimal
Contract Quality 0.0 / 21
Developer Ergonomics 1.6 / 17
Access Clarity 1.3 / 17
Operational Transparency 1.5 / 11
Contract Governance 0.0 / 10
Discoverability 4.1 / 9
Regulatory Posture 0.9 / 15
Agent readiness — 1/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Delegated User Identity 0 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Well-Known Document 0 / 5
Pagination 5 / 5
Distinct Operations 3 / 3
Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.
The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
Show this score on your site. Kin Score badge preview for OpenAPI Initiative It updates itself when the score changes. Paste this where you link to your API docs: 
<a href="https://apis.io/providers/openapi-initiative/"><img src="https://apis.io/badge/openapi-initiative/card.svg" alt="OpenAPI Initiative on APIs.io — Kin Score by API Evangelist"></a>
Other styles, a README pill and a shields.io endpoint are on the badge page.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/openapi-initiative: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Specification
tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

OpenAPI Initiative API

API for accessing OpenAPI Initiative resources, specifications, and tooling ecosystem documentation for defining standard interfaces to RESTful APIs.

Pricing Plans 1

Published pricing tiers and plan structures.

Openapi Initiative Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Openapi Initiative Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Openapi Initiative Finops

FINOPS

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Openapi Initiative Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrg
GitHubOrg

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans
Plans
 FinOps
FinOps

Company 1

The organization behind the API

LinkedIn
LinkedIn

Source (apis.yml)

apis.yml Raw ↑ 
aid: openapi-initiative
name: OpenAPI Initiative
description: The OpenAPI Initiative is a Linux Foundation project that promotes the OpenAPI Specification for defining standard,
  language-agnostic interfaces to RESTful APIs. It provides governance, tooling ecosystem support, and community collaboration
  for the most widely adopted API description format.
type: Index
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
position: Consuming
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/openapi-initiative.png
tags:
- Linux Foundation
- Specification
- Standards
tags_raw:
- Linux Foundation
- Specifications
- Standards
created: '2026-03-16'
modified: '2026-04-28'
url: https://raw.githubusercontent.com/api-evangelist/openapi-initiative/refs/heads/main/apis.yml
specificationVersion: '0.23'
apis:
- aid: openapi-initiative:openapi-initiative-api
  name: OpenAPI Initiative API
  description: API for accessing OpenAPI Initiative resources, specifications, and tooling ecosystem documentation for defining
    standard interfaces to RESTful APIs.
  humanURL: https://spec.openapis.org/
  tags:
  - Specification
  tags_raw:
  - Specifications
  properties:
  - type: Documentation
    url: https://spec.openapis.org/
common:
- type: Plans
  url: plans/openapi-initiative-plans-pricing.yml
- type: RateLimits
  url: rate-limits/openapi-initiative-rate-limits.yml
- type: FinOps
  url: finops/openapi-initiative-finops.yml
- type: DomainSecurity
  url: security/openapi-initiative-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/open-api-initiative
- type: Documentation
  name: OpenAPI Initiative Documentation
  description: Official documentation for OpenAPI Initiative.
  url: https://spec.openapis.org/
- type: GitHubOrg
  name: OpenAPI Initiative GitHub
  description: Source code and repositories for OpenAPI Initiative.
  url: https://github.com/OAI
maintainers:
- FN: Kin Lane
  email: info@apievangelist.com
- url: https://www.openapis.org/feed
  type: Blog

Work with this as data

Every provider 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 providers

9 MCP tools reach this
  • find_providersBrowse and filter every provider in the catalog.
  • get_provider_artifactsEvery artifact this provider publishes, grouped by type.
  • get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
  • get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
  • get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
  • get_provider_ratingPRO — composite, band, trend and facet scores.
  • 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 provider 
curl "https://apis.io/api/v1/providers/openapi-initiative"
All providers 
curl "https://apis.io/api/v1/providers?limit=25"
Every operation they expose 
curl "https://apis.io/api/v1/providers/openapi-initiative/operations?limit=25"
How their score was established 
curl "https://apis.io/api/v1/providers/openapi-initiative/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.