Last updated: 9 August 2026
Claude Usage Bar is a browser extension that displays your Claude.ai usage limits (your current 5-hour session and weekly all-models usage, and an Opus allowance if your plan has one) in a small bar under the chat.
While you are signed in to claude.ai, the extension reads your usage data from Claude’s own endpoints using the session that is already in your browser:
These reads happen roughly every five minutes for as long as the extension is installed and enabled, including when no claude.ai tab is open, so that the numbers you see are current rather than left over from your last visit. They stop when you turn the extension off on its Settings page.
This data is used only to render the usage bar and the extension’s popup. It is
stored locally on your own device using the browser’s storage.local
area (your display preferences and the most recent usage numbers, so the bar can
show instantly).
claude.ai,
your own service.storage: saves your preferences and last-seen usage numbers locally.https://claude.ai/*: reads your usage from your
logged-in session. No other website is accessed.alarms: schedules the periodic refresh described above. It is a
timer only, and gives the extension no additional access to your data.commands: the keyboard shortcut to show or hide the bar.Claude Usage Bar’s use of information complies with the Chrome Web Store User Data Policy, including the Limited Use requirements. Data accessed is used solely to provide the extension’s single user-facing purpose (showing your usage) and is not transferred off your device.
Uninstalling the extension removes everything it stored. You can also clear it
from chrome://extensions or your browser’s site/extension data tools.
This extension is not affiliated with, endorsed by, or sponsored by Anthropic. “Claude” is a trademark of Anthropic PBC.
Questions: vanquyet180109@gmail.com