nx-openapi-codegen

Built on top of Kubb, nx-openapi-codegen transforms an OpenAPI spec into a fully scoped NX monorepo for your GitHub organization or repository. Provide a URL or local path to your spec, and instantly generate.

Note

This is useful for now, but if it were to be a real CLI, there would be a ton of things to change - there is a checklist for this in docs/todo.md. Hard dependencies on nx should be reconsidered for example.

Autogenerated SDKs

• TypeScript Types
• Mocks
  • Faker mocks (constant or randomized)
  • MSW handlers (constant or randomized responses)
• HTTP Clients
  • Axios
  • Fetch
  • RTK Query
  • TanStack React Query
• Validation
  • Zod schemas
• Definitions
  • OpenAPI Schema JSON definitions

You’ll also get publishable GitHub npm packages for TypeScript (publishing setup is currently limited to TypeScript), and optional Swift & Kotlin (Android) scaffolds are available for multi-platform projects (publishing not yet configured).

Automatic GitHub Workflows

By default, the tool creates helpful GitHub Actions workflows to streamline development:

• main.yml: Runs on pushes to main (basic CI steps).
• pull-request.yml: Validates pull requests (linting, code generation, docs).
• release.yml: Manually triggers (via workflow_dispatch) for publishing TypeScript packages.
• update-models.yml: Periodically (on a cron schedule) regenerates all models and opens a pull request with any changes—perfect for a spec that has changed (usefu for open api docs that are deployed and change on a regular basis.

Prerequisites

• Bun (>=v1.2 recommended)

Usage

bunx nx-openapi-codegen

Follow the interactive prompts to specify your GitHub organization, repository, and OpenAPI spec path (remote or local). nx-openapi-codegen will take care of the rest—so you can focus on building applications, not boilerplate.