kubb
🧡 The meta framework for code generation. Automate OpenAPI to type-safe TypeScript, Zod, and TanStack Query with a modular, plugin-based engine.
Kubb is a meta-framework for code generation that integrates with Claude Code and other AI tools through an MCP server. It transforms OpenAPI specifications into type-safe TypeScript clients, Zod validators, TanStack Query hooks, and mock data using a modular plugin architecture. Developers point Kubb at an API schema and automatically generate complete type-safe API layers, eliminating manual boilerplate and keeping frontend code synchronized with backend contracts.
Key Features
Use Cases
- 01Generate complete type-safe API clients from OpenAPI specifications for frontend applications
- 02Automate creation of React Query or SWR hooks for data fetching with full TypeScript support
- 03Scaffold Zod schemas for runtime validation matching backend API contracts
- 04Generate mock data with Faker and MSW handlers for testing without backend dependencies
- 05Keep frontend code synchronized with backend APIs through automated regeneration on schema changes
- 06Use Claude Code or Cursor to generate and customize API integrations through natural language
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kubb — FAQ
What is Kubb?+
Kubb is a code generation meta-framework that transforms OpenAPI schemas into type-safe TypeScript clients, validators, hooks, and mocks. It includes an MCP server for integration with AI tools like Claude Code and Cursor.
How do I install Kubb?+
Install Kubb via npm, pnpm, or bun (e.g., 'npm install kubb'). Run 'npx kubb init' to launch the setup wizard, which guides you through plugin selection and creates a kubb.config.ts configuration file. Then run 'npx kubb generate' to produce your code.
Which AI clients does Kubb work with?+
Kubb works with Claude Code, Cursor, and Claude Desktop through its built-in MCP server. The plugin-mcp module enables AI-driven code generation from these tools.
Does Kubb require API keys or external services?+
Kubb itself does not require API keys to generate code from local OpenAPI files. However, if your OpenAPI schema is hosted remotely or you use AI features through Claude/Cursor, those services may require authentication.
Is Kubb free to use?+
Yes, Kubb is open source and licensed under the MIT License. It is free for commercial and personal use.
Can I customize the generated code?+
Yes, Kubb provides a plugin authoring toolkit (kubb/kit) with a JSX renderer for building custom generators. You can enable or disable plugins, filter operations, and control file organization through kubb.config.ts.
How do I install kubb?+
Open the source repository on GitHub and follow its README. kubb is a plugin — MCP Agents Market links you directly to the official repo.
Is kubb free?+
kubb is an open-source project hosted on GitHub. Check the repository for its license and any usage requirements.