Privacy Policy — Claude Usage Monitor
Last updated: May 2026
OVERVIEW
Claude Usage Monitor is a Chrome extension that displays your Claude.ai subscription usage limits directly in your browser toolbar. This policy explains what data is accessed, how it is used, and what is never done with it.
DATA ACCESSED
The extension reads the following data from claude.ai while you are logged in:
1. Usage data — your current 5-Hour limit, 7-Day limit, Claude Design usage, and Extra Usage figures, fetched from the claude.ai usage API.
2. Credits data — your prepaid credit balance and auto-reload settings, fetched from the claude.ai credits API.
3. Organisation ID — extracted from the API URL to identify your account session. Used only to construct subsequent API requests.
This data is accessed using your existing browser login session. No passwords, tokens, or credentials are ever read, stored, or transmitted by the extension.
HOW DATA IS STORED
All data is stored locally on your device using Chrome's built-in storage APIs:
- chrome.storage.local — stores usage data, credits data, last-fetch timestamp, and fetch status. Stays on your device only.
- chrome.storage.sync — stores your settings (theme, refresh interval, notification preferences). Synced across your own Chrome profile via Google's standard sync infrastructure, exactly like Chrome bookmarks.
No data is sent to any server, database, or third party operated by this extension.
WHAT WE DO NOT DO
- We do not collect, transmit, or sell any personal data.
- We do not track your browsing activity.
- We do not read your Claude conversations, prompts, or outputs.
- We do not store credentials or session tokens.
- We do not communicate with any server other than claude.ai (and only using your own session).
PERMISSIONS USED
- storage — to save usage data and settings locally.
- alarms — to schedule periodic background refresh of usage data.
- notifications — to send an optional desktop alert when your usage reaches a configured threshold.
- Host permission for https://claude.ai/* — to read usage data from the claude.ai API using your active login session.
THIRD PARTIES
This extension does not integrate with, share data with, or load content from any third-party service. The only external connection made is to claude.ai, and only on your behalf using your own session.
CHANGES
If this policy changes, the updated version will be published at the same location with a revised "Last updated" date.