# Introduction

> What circuly is and how these docs are organised.

circuly powers rental and subscription commerce. These docs cover every part of the platform in one place.

## How the docs are organised

- **Guides** explain how to use each product, like the Hub and Checkout.
- **Knowledge** covers the concepts behind the platform: subscriptions, orders, payments.
- **API reference** lists every endpoint for each API version. It's generated from the OpenAPI spec, so it always matches what the API really does.

## Next steps

Start with the [Cart](https://docs.development.circuly.io/cart) docs, or go straight to the [API reference](https://docs.development.circuly.io/api).