# Echo Stack Text

> Headline extruded into a stack of outlined echoes that fade from one colour to another. Your cursor acts as a light and the stack falls away from it, with the farther echoes on looser springs, so quick moves bend it into a tail. Click to punch the extrusion out, and when the pointer leaves the light circles on its own. It's em-based, so it scales with the font.

- Slug: `echo-stack-text`
- Category: [Text effects](https://www.assembli.design/category/text-effects.md)
- Type: component
- Tags: typography, extrude, outline, spring, cursor, headline, motion
- npm dependencies: motion
- shadcn/ui dependencies: none
- Added: 2026-10-25
- Live preview: https://www.assembli.design/preview/echo-stack-text
- Page: https://www.assembli.design/components/echo-stack-text

## 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/echo-stack-text/echo-stack-text.tsx` and installs dependencies):

```bash
npx shadcn@latest add @assembli/echo-stack-text
```

Registry item JSON: https://www.assembli.design/r/echo-stack-text.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.