# Scratch Card

> A canvas scratch-off: holographic foil with a coin cursor that you rub away with mouse or finger. Tracks how much is cleared, auto-reveals past a threshold with a sparkle burst, and gives keyboard users a Reveal button.

- Slug: `scratch-card`
- Category: [Cards](https://www.assembli.design/category/cards.md)
- Type: component
- Tags: scratch, canvas, reveal, reward, gamification
- npm dependencies: motion
- shadcn/ui dependencies: none
- Added: 2026-10-15
- Live preview: https://www.assembli.design/preview/scratch-card
- Page: https://www.assembli.design/components/scratch-card

## 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/scratch-card/scratch-card.tsx` and installs dependencies):

```bash
npx shadcn@latest add @assembli/scratch-card
```

Registry item JSON: https://www.assembli.design/r/scratch-card.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.