OpenAPI TypeScript Codegen

aid: openapi-typescript-codegen
name: OpenAPI TypeScript Codegen
description: 'OpenAPI TypeScript Codegen is an MIT-licensed Node.js library and CLI by Ferdi Koomen that reads an OpenAPI
  2.0 or 3.0 specification — JSON or YAML, from a path, URL, or string — and generates a lightweight, fully typed TypeScript
  client. It emits models, services, and core runtime files for one of five HTTP clients (fetch, node-fetch, XHR, Axios, or
  Angular), and supports cancelable promises, union types instead of enums, runtime schemas, custom request files, and external
  $ref resolution. It is a build-time developer tool, not a hosted service: there is no API to call, no key to issue, and
  no pricing. The maintainer has publicly declared the project unmaintained and asks users to migrate to @hey-api/openapi-ts,
  yet maintenance releases still shipped in December 2025 and June 2026 and the package records roughly 2.46 million npm downloads
  a month.'
type: Index
deliveryModel:
  model: unknown
  open_source: unknown
  commercial: true
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - pricing
  - repository-unlicensed
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: free
  onboarding: self-service
  trial: false
  try_now: true
  public: true
  label: Free / Open Source (MIT)
  confidence: high
  source:
  - plans
  - https://github.com/ferdikoomen/openapi-typescript-codegen/blob/main/LICENSE
  generated: '2026-08-06'
  method: searched
  note: Corrected from a scaffold-derived "freemium" label. The tool is MIT-licensed and free with no paid tier; GitHub Sponsors
    is optional and gates nothing.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/openapi-typescript-codegen.png
tags:
- Code Generation
- OpenAPI
- Swagger
- SDK
- TypeScript
- Developer Tools
- CLI
- Open-Source
tags_raw:
- Code Generation
- OpenAPI
- Swagger
- SDKs
- TypeScript
- Developer Tools
- CLI
- Open Source
url: https://raw.githubusercontent.com/api-evangelist/openapi-typescript-codegen/refs/heads/main/apis.yml
created: '2026-03-27'
modified: '2026-08-06'
specificationVersion: '0.23'
apis:
- aid: openapi-typescript-codegen:openapi-typescript-codegen
  name: OpenAPI TypeScript Codegen
  description: The openapi CLI and Node.js library. Consumes an OpenAPI 2.0 or 3.0 specification and writes a typed TypeScript
    client (models, services, and core runtime) for fetch, node-fetch, XHR, Axios, or Angular. This is a build-time generator
    that runs locally or in CI — it publishes no HTTP API of its own, so it has no baseURL.
  humanURL: https://github.com/ferdikoomen/openapi-typescript-codegen
  tags:
  - Code Generation
  - SDK
  - TypeScript
  tags_raw:
  - Code Generation
  - SDKs
  - TypeScript
  properties:
  - type: Documentation
    url: https://github.com/ferdikoomen/openapi-typescript-codegen#readme
  - type: GettingStarted
    url: https://github.com/ferdikoomen/openapi-typescript-codegen#usage
  - type: CLI
    url: cli/openapi-typescript-codegen-cli.yml
  - type: Packages
    url: packages/openapi-typescript-codegen-packages.yml
  - type: SourceCode
    url: https://github.com/ferdikoomen/openapi-typescript-codegen
common:
- type: Releases
  url: https://github.com/ferdikoomen/openapi-typescript-codegen/releases
- type: CodeOfConduct
  url: https://github.com/ferdikoomen/openapi-typescript-codegen/blob/main/CODE_OF_CONDUCT.md
- type: ContributionGuide
  url: https://github.com/ferdikoomen/openapi-typescript-codegen/blob/main/CONTRIBUTING.md
- type: Website
  url: https://github.com/ferdikoomen/openapi-typescript-codegen
- type: Documentation
  url: https://github.com/ferdikoomen/openapi-typescript-codegen/wiki
- type: GettingStarted
  url: https://github.com/ferdikoomen/openapi-typescript-codegen/wiki/Basic-usage
- type: GitHubOrganization
  url: https://github.com/ferdikoomen
- type: GitHubRepository
  url: https://github.com/ferdikoomen/openapi-typescript-codegen
- type: SourceCode
  url: https://github.com/ferdikoomen/openapi-typescript-codegen
- type: Support
  url: https://github.com/ferdikoomen/openapi-typescript-codegen/issues
- type: License
  url: https://github.com/ferdikoomen/openapi-typescript-codegen/blob/main/LICENSE
- type: ChangeLog
  url: changelog/openapi-typescript-codegen-changelog.yml
- type: Deprecation
  url: https://github.com/ferdikoomen/openapi-typescript-codegen#important-announcement
- type: Lifecycle
  url: lifecycle/openapi-typescript-codegen-lifecycle.yml
- type: CLI
  url: cli/openapi-typescript-codegen-cli.yml
- type: Packages
  url: packages/openapi-typescript-codegen-packages.yml
- type: Conformance
  url: conformance/openapi-typescript-codegen-conformance.yml
- type: LLMsTxt
  url: llms/openapi-typescript-codegen-llms.txt
- type: Plans
  url: plans/openapi-typescript-codegen-plans-pricing.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-enrichment:
  date: '2026-08-06'
  status: enriched
  artifacts_added: 5
  pass: local-v1
x-coverage:
  state: none
  reason: no-developer-program
  detail: OpenAPI TypeScript Codegen is a build-time npm CLI that generates clients from someone else's OpenAPI — it ships
    no API, no baseURL, and no domain of its own, so there is no host to probe for a spec, /.well-known, MCP, or an agent
    card; the artifacts here describe the tool (npm package, CLI flags, changelog, deprecation notice) rather than a service.
  evidence:
  - url: https://raw.githubusercontent.com/ferdikoomen/openapi-typescript-codegen/main/llms.txt
    status: 404
  - url: https://raw.githubusercontent.com/ferdikoomen/openapi-typescript-codegen/main/SECURITY.md
    status: 404
  - url: https://registry.npmjs.org/openapi-typescript-codegen
    status: 200
  - url: https://api.github.com/repos/ferdikoomen/openapi-typescript-codegen
    status: 200
  checked: '2026-08-06'