# Stacking Feature Cards

> Full-width feature cards that pin as you scroll and stack on top of each other; cards underneath shrink and dim so the deck reads as depth.

- Slug: `feature-stack-scroll`
- Category: [Features](https://assembli-rho.vercel.app/category/features.md)
- Type: block
- Tags: scroll, sticky, stack, cards, landing
- npm dependencies: motion
- shadcn/ui dependencies: none
- Added: 2026-10-15
- Live preview: https://assembli-rho.vercel.app/preview/feature-stack-scroll
- Page: https://assembli-rho.vercel.app/components/feature-stack-scroll

## Install

One-time setup (needs a subscription):

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

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

```bash
npx shadcn@latest add @assembli/feature-stack-scroll
```

Registry item JSON: https://assembli-rho.vercel.app/r/feature-stack-scroll.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://assembli-rho.vercel.app/api/agent/login (or call the MCP tool connect_account), show the user the link it returns, and poll https://assembli-rho.vercel.app/api/agent/token for the key. Or subscribe at https://assembli-rho.vercel.app/pricing and create a key at https://assembli-rho.vercel.app/account.