Claude Usage Monitor

Shows Claude AI usage status in your browser toolbar

See your Claude.ai usage limits at a glance — right in the toolbar badge. No setup needed, just log in to Claude and go. WHAT IT DOES The badge cycles through all active limits with color-coded labels so you always know which one you're looking at. Click the icon to open a detailed popup with progress bars, reset times, and exact percentages for every limit. Pin the extension to your toolbar to keep usage percentages always visible. USAGE LIMITS TRACKED • 5-hour limit • 7-day overall • 7-day Sonnet • 7-day Opus • 7-day OAuth Apps • 7-day Cowork • Other • Extra Usage (monthly limit, amount used, remaining balance) FEATURES • Color-coded badge cycling through all active limits • Per-source badge visibility — hide any limit from the cycling badge with a single click (e.g. show only 5-hour and 7-day), preference persists across sessions • Detailed popup with progress bars and reset countdowns • Collapsible cards — click to expand/collapse, layout persists across sessions • Prepaid credit balance display • Configurable auto-refresh interval (2, 5, 10, 15, or 30 min — default 5 min) • Manual refresh button • Raw API data view for debugging HOW IT WORKS The extension reads usage data from claude.ai using your existing browser session. No API key needed. No data is sent to third parties — everything stays local in your browser. REQUIREMENTS • You must be logged into claude.ai • Works in Chrome and Chromium-based browsers (Edge, Brave, etc.) TESTED PLANS Tested on Pro and Max 5x plans. If something doesn't work on your plan, please open an issue on GitHub. The popup has a "Show raw data" toggle at the bottom that reveals the raw JSON responses — including these in your issue will help with debugging. SOURCE CODE https://github.com/mrpesho/claude-usage-monitor ⚠️ This extension uses Claude.ai's internal API endpoints (not Anthropic's public API). It may stop working at any time if those endpoints change. Not affiliated with or endorsed by Anthropic. Built with Claude Code.