# Feature Cube

> Feature section built around a real CSS 3D cube. Each side face shows one feature's visual. The cube turns the short way round on a spring when you pick a feature, autoplays with a progress line, and you can grab it to spin. Faces darken as they turn from the light, over a perspective floor grid.

- Slug: `feature-cube`
- Category: [3D](https://www.assembli.design/category/3d.md)
- Type: block
- Tags: 3d, cube, features, perspective, drag, autoplay
- npm dependencies: motion
- shadcn/ui dependencies: none
- Added: 2026-10-15
- Live preview: https://www.assembli.design/preview/feature-cube
- Page: https://www.assembli.design/components/feature-cube

## Install

One-time setup (needs a subscription):

1. Add the registry to the project's `components.json`: `{"@assembli":{"url":"https://www.assembli.design/r/{name}.json","headers":{"Authorization":"Bearer ${ASSEMBLI_API_KEY}"}}}` (merge into `"registries"`).
2. Put an API key from https://www.assembli.design/account in `.env.local` as `ASSEMBLI_API_KEY=asm_…`.

Then install with the shadcn CLI (writes `components/feature-cube/feature-cube.tsx` and installs dependencies):

```bash
npx shadcn@latest add @assembli/feature-cube
```

Registry item JSON: https://www.assembli.design/r/feature-cube.json (send `Authorization: Bearer <api key>`)

## Code

> Component source needs an Assembli subscription ($12/month) and an API key sent as `Authorization: Bearer <key>`. To get one without copying anything, POST https://www.assembli.design/api/agent/login (or call the MCP tool connect_account), show the user the link it returns, and poll https://www.assembli.design/api/agent/token for the key. Or subscribe at https://www.assembli.design/pricing and create a key at https://www.assembli.design/account.