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Usage Meter for Claude.ai — Privacy Policy

Last updated: July 9, 2026

Trademark notice

Claude and Claude.ai are trademarks of Anthropic PBC. Usage Meter for Claude.ai is an independent, unofficial tool and is not affiliated with, endorsed by, or sponsored by Anthropic.

Summary

Usage Meter for Claude.ai is a Chrome extension that shows your own Claude.ai session and weekly usage limits from the toolbar. It does not collect, transmit to any third party, store remotely, or sell any user data. The only network calls it makes go directly from your browser to claude.ai.

What data this extension handles

This extension reads the sessionKey cookie you already have from being logged into claude.ai in Chrome, using Chrome's cookies permission. That cookie value is used only to authenticate requests made directly from your browser to claude.ai's own usage API (https://claude.ai/api/organizations/<id>/usage) — it is never transmitted anywhere else, and the developer never receives it.

Your settings (thresholds, refresh interval, badge metric, theme) and the most recently fetched usage numbers are saved locally using chrome.storage, staying on your device inside your own browser profile.

This extension has no backend server of its own, and uses no analytics, tracking, or advertising libraries of any kind.

Permissions and why they're needed

cookies — reads your existing claude.ai session cookie so the extension can authenticate to Claude's usage API on your behalf.

storage — saves your settings and the last-fetched usage data locally so they persist across browser sessions.

alarms — schedules the periodic background refresh at the interval you configure.

notifications — shows a desktop notification when your usage crosses a threshold you've set, only if you enable notifications.

host_permissions (https://claude.ai/*) — the only host this extension ever communicates with.

Data sharing

This extension does not sell, transfer, or share any data with third parties. It has nothing to share — the session cookie and usage data it reads never leave the direct connection between your browser and claude.ai.

An important note on the underlying API

This extension relies on Claude.ai's internal, undocumented usage API rather than an official Anthropic-provided integration. Anthropic can change or restrict this API at any time without notice. Use of this extension may also be subject to Claude.ai's own Terms of Service.

Changes to this policy

If this extension's data practices ever change, this page will be updated and the "Last updated" date above will reflect the change.