Claude Sidebar Monitor

Monitor your Claude AI usage limits at a glance — directly in the sidebar.

Claude Sidebar Monitor adds a lightweight widget to the claude.ai sidebar that shows your session (5-hour) and weekly (7-day) usage limits in real time. No clicks needed. No page to visit. Just glance at the sidebar.

FEATURES
- Sidebar widget — See usage without leaving your conversation
- Collapsed mode — Color-coded square with percentage number
- Expanded mode — Progress bars, percentages, and reset countdowns
- Popup — Click the icon for plan info and specific model limits
- Dynamic icon — Usage percentage displayed on the extension icon
- Dark & light theme — Adapts automatically to your Claude theme
- Arc Browser — Opens usage page in a Little Arc window
- Health alerts — In-page banner if the extension stops working
- Privacy first — All data stays on your device

HOW IT WORKS
The extension reads your usage from Claude's internal API (the same data shown on /settings/usage). It refreshes every 2 minutes, only when a Claude tab is open.

TESTED ON
Max plan (5x/20x) — fully tested. Pro should work. Team/Enterprise/Free — feedback welcome.

PRIVACY
- No data transmitted externally
- No analytics or tracking
- No third-party services
- Open source: github.com/theochab/claude-sidebar-monitor

Built by theo_cs using Claude Opus 4.6.