# Heatmap Calendar

> Year-long contribution heatmap with month and weekday labels, quantile-based intensity levels from any colour, a column-by-column reveal on view and a pointer-following tooltip. Timezone-safe (UTC) and hydration-safe.

- Slug: `heatmap-calendar`
- Category: [Charts](https://www.assembli.design/category/charts.md)
- Type: component
- Tags: heatmap, calendar, contributions, activity, github
- npm dependencies: motion
- shadcn/ui dependencies: none
- Added: 2026-10-14
- Live preview: https://www.assembli.design/preview/heatmap-calendar
- Page: https://www.assembli.design/components/heatmap-calendar

## 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/heatmap-calendar/heatmap-calendar.tsx` and installs dependencies):

```bash
npx shadcn@latest add @assembli/heatmap-calendar
```

Registry item JSON: https://www.assembli.design/r/heatmap-calendar.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.