Easy to Use

Get started in minutes — no heavy setup, no endless configuration. Stop wasting time juggling libraries and plugins just to get validation and OpenAPI running in your API.

Type-Safe API Client

Generate OpenAPI typings from your backend schemas and consume them with autocomplete and predictable errors.

Powered by Bun

CrumbJS runs on top of Bun, the next-generation JavaScript runtime. Enjoy blazing-fast startup times, a modern toolchain out of the box, and the performance you need to build APIs that scale — without extra setup.