OpenAPI Generator

OpenAPI Generator is a community-governed, Apache-2.0 open-source project that generates client libraries (SDKs), server stubs, API documentation and configuration automatically from an OpenAPI Specification (v2 and v3). Forked from Swagger Codegen in 2018 by more than 40 of that project's top contributors and template creators, it is one of the most widely deployed implementations of the OpenAPI Specification in existence. The product is a CLI plus Maven, Gradle and sbt plugins, a Docker image and an embeddable JVM library, distributed through npm, PyPI, Maven Central, Homebrew, Scoop and Docker Hub. A hosted Online Generator REST API at api.openapi-generator.tech offers the same generation over HTTP, anonymously and without a key, across 84 client generators and 65 server frameworks.

OpenAPI Generator publishes 2 APIs on the APIs.io network: Clients API and Servers API. Tagged areas include Code Generation, Documentation, Open-Source, OpenAPI, and SDK.

OpenAPI Generator’s developer surface includes CLI, changelog, documentation, API reference, getting-started guide, support, engineering blog, and 24 more developer resources.

🌐 Visit website 📡 Source on GitHub

40.6/100 developing ▬ flat Agent 22/100 agent aware Full breakdown ↓
scored 2026-09-14 · rubric v0.22.0

AccessFree⚡ Free to try

1 APIs

Code Generation Documentation Open-Source OpenAPI SDK API Tooling Developer Tools SwaggerServer StubsCodegen

Kin Score

Kin Score How this is scored →
scored 2026-09-14 · rubric v0.22.0

Composite quality — 40.6/100 · developing

Contract Quality 9.9 / 23

Developer Ergonomics 11.9 / 18

Access Clarity 5.2 / 18

Operational Transparency 2.8 / 12

Contract Governance 0.5 / 11

Discoverability 6.8 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 22/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 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

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

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-generator: 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 →

APIs 2

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

OpenAPI Generator Clients API

The clients API from OpenAPI Generator — 3 operation(s) for clients.

OpenAPI Generator Servers API

The servers API from OpenAPI Generator — 3 operation(s) for servers.

Open Collections 3

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

OpenAPI Generator Online Clients API

OPEN COLLECTION

OpenAPI Generator Online Servers API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Openapi Generator Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Openapi Generator Rate Limits

0 limits

RATE LIMITS

FinOps 1

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

Openapi Generator Finops

FINOPS

Security Posture 2

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

Openapi Generator Authentication

0 schemes

SECURITY

Openapi Generator Domain Security

TLSv1.3 · HSTS

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 3

Reference material describing how the API behaves

ContributionGuide

ContributionGuide

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

X-MCPServerCandidate

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Lifecycle

Lifecycle

Conformance

Conformance

Build 6

SDKs, sample code, and the tooling you integrate with

CodeOfConduct

CodeOfConduct

Packages

Packages

CLI

CLI

GitHubOrganization

GitHubOrganization

GitHubRepository

GitHubRepository

Plugins

Plugins

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 6

Status, limits, changes, and where to get help

Releases

ChangeLog

RateLimits

Support

Roadmap

FAQ

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

License

License

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 3

Properties that don't map to a standard resource type

Overlay

Overlay

Generators

Generators

Team

Team

Source (apis.yml)

aid: openapi-generator
name: OpenAPI Generator
description: OpenAPI Generator is a community-governed, Apache-2.0 open-source project that generates client libraries (SDKs),
  server stubs, API documentation and configuration automatically from an OpenAPI Specification (v2 and v3). Forked from Swagger
  Codegen in 2018 by more than 40 of that project's top contributors and template creators, it is one of the most widely deployed
  implementations of the OpenAPI Specification in existence. The product is a CLI plus Maven, Gradle and sbt plugins, a Docker
  image and an embeddable JVM library, distributed through npm, PyPI, Maven Central, Homebrew, Scoop and Docker Hub. A hosted
  Online Generator REST API at api.openapi-generator.tech offers the same generation over HTTP, anonymously and without a
  key, across 84 client generators and 65 server frameworks.
type: Index
deliveryModel:
  model: unknown
  open_source: unknown
  commercial: true
  callable_host: true
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  - pricing
  - repository-unlicensed
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: free
  onboarding: none
  trial: false
  try_now: true
  public: true
  label: Free / Open Source
  confidence: high
  source:
  - plans
  - https://openapi-generator.tech/docs/installation
  - https://api.openapi-generator.tech/api/gen/clients
  generated: '2026-08-06'
  method: searched
  note: Apache-2.0 project with no commercial tier, no sign-up and no API key; the hosted generator answers anonymously. The
    prior derived value (freemium) came from a scaffold plans file carrying invented paid tiers, corrected 2026-08-06.
position: Consuming
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/openapi-generator.png
tags:
- Code Generation
- Documentation
- Open-Source
- OpenAPI
- SDK
- API Tooling
- Developer Tools
- Swagger
- Server Stubs
- Codegen
tags_raw:
- Code Generation
- Documentation
- Open Source
- OpenAPI
- SDK
- API Tooling
- Developer Tools
- Swagger
- Server Stubs
- Codegen
url: https://raw.githubusercontent.com/api-evangelist/openapi-generator/refs/heads/main/apis.yml
created: '2026-03-16'
modified: '2026-08-06'
specificationVersion: '0.23'
apis:
- aid: openapi-generator:openapi-generator-clients-api
  name: OpenAPI Generator Clients API
  description: The clients API from OpenAPI Generator — 3 operation(s) for clients.
  humanURL: https://openapi-generator.tech/docs/online
  baseURL: https://api.openapi-generator.tech
  tags:
  - Clients
  tags_raw:
  - clients
  properties:
  - type: OpenAPI
    url: openapi/openapi-generator-clients-api-openapi.yml
  - type: Authentication
    url: authentication/openapi-generator-authentication.yml
  - type: Conventions
    url: conventions/openapi-generator-conventions.yml
  - type: ErrorCatalog
    url: errors/openapi-generator-problem-types.yml
  - type: DataModel
    url: data-model/openapi-generator-data-model.yml
  - type: APIReference
    url: https://api.openapi-generator.tech/
  - type: Documentation
    url: https://openapi-generator.tech/docs/online
  - type: GettingStarted
    url: https://openapi-generator.tech/docs/usage
  - type: GitHubRepository
    url: https://github.com/OpenAPITools/openapi-generator
- aid: openapi-generator:openapi-generator-servers-api
  name: OpenAPI Generator Servers API
  description: The servers API from OpenAPI Generator — 3 operation(s) for servers.
  humanURL: https://openapi-generator.tech/docs/online
  baseURL: https://api.openapi-generator.tech
  tags:
  - Servers
  tags_raw:
  - servers
  properties:
  - type: OpenAPI
    url: openapi/openapi-generator-servers-api-openapi.yml
  - type: Authentication
    url: authentication/openapi-generator-authentication.yml
  - type: Conventions
    url: conventions/openapi-generator-conventions.yml
  - type: ErrorCatalog
    url: errors/openapi-generator-problem-types.yml
  - type: DataModel
    url: data-model/openapi-generator-data-model.yml
  - type: APIReference
    url: https://api.openapi-generator.tech/
  - type: Documentation
    url: https://openapi-generator.tech/docs/online
  - type: GettingStarted
    url: https://openapi-generator.tech/docs/usage
  - type: GitHubRepository
    url: https://github.com/OpenAPITools/openapi-generator
common:
- type: Releases
  url: https://github.com/OpenAPITools/openapi-generator/releases
- type: CodeOfConduct
  url: https://github.com/OpenAPITools/openapi-generator/blob/master/CODE_OF_CONDUCT.md
- type: ContributionGuide
  url: https://github.com/OpenAPITools/openapi-generator/blob/master/CONTRIBUTING.md
- type: Overlay
  url: overlays/openapi-generator-online-overlay.yaml
- type: DomainSecurity
  url: security/openapi-generator-domain-security.yml
- type: Packages
  url: packages/openapi-generator-packages.yml
- type: CLI
  url: cli/openapi-generator-cli.yml
- type: ChangeLog
  url: changelog/openapi-generator-changelog.yml
- type: Lifecycle
  url: lifecycle/openapi-generator-lifecycle.yml
- type: Conformance
  url: conformance/openapi-generator-conformance.yml
- type: X-MCPServerCandidate
  url: mcp/openapi-generator-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/openapi-generator-llms.txt
- type: RateLimits
  url: rate-limits/openapi-generator-rate-limits.yml
- type: Plans
  url: plans/openapi-generator-plans-pricing.yml
- type: FinOps
  url: finops/openapi-generator-finops.yml
- type: Website
  url: https://openapi-generator.tech
- type: DeveloperPortal
  url: https://openapi-generator.tech
- type: Documentation
  url: https://openapi-generator.tech/docs/installation
- type: APIReference
  url: https://api.openapi-generator.tech/
- type: GettingStarted
  url: https://openapi-generator.tech/docs/usage
- type: GitHubOrganization
  url: https://github.com/OpenAPITools
- type: GitHubRepository
  url: https://github.com/OpenAPITools/openapi-generator
- type: Support
  url: https://github.com/OpenAPITools/openapi-generator/issues
- type: Roadmap
  url: https://openapi-generator.tech/docs/roadmap
- type: Blog
  url: https://openapi-generator.tech/blog
- type: FAQ
  url: https://openapi-generator.tech/docs/faq
- type: Generators
  url: https://openapi-generator.tech/docs/generators
- type: Plugins
  url: https://openapi-generator.tech/docs/plugins
- type: Team
  url: https://openapi-generator.tech/team
- type: License
  url: https://github.com/OpenAPITools/openapi-generator/blob/master/LICENSE
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-enrichment:
  date: '2026-08-06'
  status: enriched
  artifacts_added: 17
  pass: local-v1

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