# OpenAPI TypeScript Codegen

**Canonical:** https://apis.io/providers/openapi-typescript-codegen/  
**APIs profiled:** 1

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.

## Kin Score — 24.0 / 100 (emerging)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (-0.7 from 24.7).

| Facet | Score |
|---|---|
| Discoverability | 59.3 |
| Contract Quality | 0.0 |
| Governance | 18.2 |
| Contract Governance | 18.2 |
| Operational Transparency | 26.3 |
| Developer Ergonomics | 33.3 |
| Commercial Clarity | 28.9 |
| Access Clarity | 28.9 |

## Agent readiness — 2.5 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Free / Open Source (MIT) — onboarding: unknown, pricing: free, trial: no (confidence: high).

## APIs (1)

- **OpenAPI TypeScript Codegen** — 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...

## Plans (1)

- **Openapi Typescript Codegen Plans Pricing**

## Tags

Code Generation, OpenAPI, Swagger, SDK, TypeScript, Developer Tools, CLI, Open-Source

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/openapi-typescript-codegen/). Scores are computed from the provider's own public artifacts under a published rubric.