Heatmaps

Embeddable, matching GitHub-style activity graphs for Last.fm and GitHub.

<img src="https://heat.oli.boo/lastfm/YOUR_USERNAME" alt="Last.fm activity" />
<img src="https://heat.oli.boo/github/YOUR_USERNAME" alt="GitHub activity" />

Both sources expose the same interface:

• GET /lastfm/:username and GET /github/:username return adaptive SVGs.
• Add .svg for an explicit SVG URL.
• Add .png?theme=light or .png?theme=dark for a 2× PNG.
• Add /streak for the current America/Los_Angeles streak as {"streak": 14}.
• Add /total for the exact America/Los_Angeles period displayed by the chart as {"total": 8167, "from": "2025-07-13", "to": "2026-07-15"}. GitHub totals are contributions, not only commits.

All images accept display=full|dates|minimal. full includes labels, totals, attribution, and the legend; dates omits the footer; minimal returns only the tile grid.

How it works

• Last.fm completed scrobbles and GitHub GraphQL contributionCalendar days are normalized into the same daily activity snapshot.
• One renderer supplies identical layouts, display modes, SVG/PNG output, and source-specific red or green palettes.
• Source-isolated daily aggregates are stored in Workers KV. Rendered images and streak and total responses are cached at the edge for six hours.

See DEPLOY.md to deploy your own instance.

License

MIT