Claude Usage Monitor by Aleš Kancilija

Displays your Claude AI usage limits directly in the browser toolbar as a cycling badge.

Features:
- Toolbar badge cycles through all active usage metrics every 4 seconds
- Popup shows progress bars for each limit: 5-Hour, 7-Day Overall, Claude Design, OAuth Apps, Cowork, Routine Runs, and Extra Usage
- Prepaid credit balance displayed when available
- Toggle individual metrics on/off from the badge cycle
- Collapsible cards with reset times
- Auto-refresh (configurable: 2–30 min)
- Raw API data viewer with copy-to-clipboard

Note: This extension uses undocumented internal claude.ai APIs that Anthropic does not officially support. It may stop working if Anthropic changes their endpoints.