What the extension does
Claude Usage Monitor reads your Claude.ai usage statistics (session and weekly percentages, per-model weekly usage, daily routine-run counts, and reset times) and displays them in your browser toolbar. It fetches this data directly from Claude's internal API using your existing login session.
No data ever leaves your device to any server other than claude.ai itself, the same server your browser already talks to when you use Claude.
Data collected and stored
- Session usage percentage and reset time
- Weekly usage percentages and reset times (all models, plus Fable, Opus, Sonnet and Claude Design when your plan includes them)
- Daily routine-run count (used / limit, on plans that include routine runs)
- Extra-usage credits (used vs. monthly cap, plus your remaining prepaid credit balance, when enabled on your plan)
- Your subscription tier (e.g. Max 5x), cached for the badge in the popup header
- Timestamp of the last successful refresh
- Your Claude organization ID (cached to avoid repeated API calls)
- Display preferences: chosen theme, popup layout and which optional cards are visible
All of this is stored exclusively in chrome.storage.local, on your device, in your browser's local storage. It is never synced to Google's servers, never sent to us, and never shared with any third party.
Network requests
The extension makes requests exclusively to claude.ai (the same origin as the Claude.ai web app) and only to five endpoints: /api/organizations (organization list), /api/organizations/{id}/usage (usage statistics), /api/organizations/{id}/prepaid/credits (prepaid usage-credit balance), /api/organizations/{id}/overage_spend_limit (monthly usage-credit spend and limit), and /v1/code/routines/run-budget (daily routine-run budget). These are the same endpoints the official usage page uses. Requests are authenticated with your existing browser session cookies.
No requests are made to any other domain. There are no analytics, no telemetry, no crash reporting services, and no ad networks.
Permissions explained
No tracking, no accounts
The extension has no user accounts, no sign-up, and no registration. It does not track usage patterns, browsing history, or any personally identifiable information. It does not use cookies of its own.
Changes to this policy
If this policy changes, the updated version will be posted at this URL. The extension version number in manifest.json will also be incremented.
Contact
Questions or concerns? Send us an email.