What the extension does
Claude Monitor is a browser extension for Chrome, Firefox and Edge. It is listed as "Claude Usage Tracker & Monitor" on the Chrome Web Store, "Claude Usage Tracker" on Firefox Add-ons and "Claude Monitor: Usage Tracker" on Edge Add-ons. It reads your Claude usage figures (session and weekly percentages, per-model weekly usage, daily routine-run counts, usage-credit spend and the reset times) and shows them in your browser toolbar. If you turn on the optional usage bar, it also shows them above the claude.ai chat box.
It reads these figures from claude.ai with the login session you already have in that browser. When you install it, it opens a welcome page that ships inside the extension: a local file, with nothing loaded from the web.
Data the extension stores on your device
- 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
- Time and result of the last refresh (for example "worked" or "signed out")
- A history of your usage percentages over time, for the small charts and the pace forecast, kept for the number of days you choose in Settings
- Your Claude organization ID (cached to avoid repeated API calls), plus the IDs, names and plan types of the organizations your account belongs to, so the popup can let you pick one
- With the usage bar on: the time and usage figure of your last 20 replies on claude.ai, for the estimate of messages left, and a short hash of each one so it is counted once. Never their content
- Your settings: refresh interval, alert thresholds, history retention, theme, popup layout and which optional cards are visible
- Housekeeping: the install date, the number of days you opened the popup and the last one, when you first saw the usage bar, where the bar last placed itself (above the chat box or as a floating pill, on a chat or Claude Code page), which alerts already went off in the current window, whether you dismissed a tip or the review request, and counters that slow down retries after failed refreshes
All of this is stored locally on your device via chrome.storage.local, including the usage history: no account, no server, no sync. The extension does not send it anywhere. The one exception is the uninstall survey described below, which can include five coarse values derived from it, and only if you tick a box. Removing the extension deletes this data from your browser.
Network requests
The extension's code makes read-only GET requests to five paths on claude.ai (the same origin as the Claude web app): /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 claude.ai's own usage page uses. Your browser attaches your claude.ai session cookie to them; the extension has no cookies permission, and its code does not read or store that cookie.
Those five requests are all the network requests the extension's code makes. Links you click in the popup or in Settings (claude.ai, the store pages, claude-monitor.com or the Microsoft Store) open in a normal browser tab. When you uninstall it, your browser opens the survey page described below. There are no analytics, no telemetry, no crash reporting and no ads. On Firefox, the add-on declares to Mozilla that it collects no data.
Permissions explained
If you uninstall the extension
When you remove the extension, your browser opens a page on claude-monitor.com. Its address carries the extension version and the browser family (Chrome, Edge or Firefox). In Chrome and Edge, from version 1.21, it also carries five coarse values after the # sign: your plan type (Free, paid or unknown), whether the usage bar was on, whether the bar found the chat box, how the last refresh went (worked, signed out, no organization found, Free plan, failed, or no refresh yet) and roughly how long ago you installed it (less than a day, under a week, under a month, or longer). Browsers do not send the part after the # to the server when they open a page.
The page asks one optional question about why you left, with an optional follow-up and comment. Closing the page sends nothing. If you answer, we store your answer, follow-up and comment with the extension version, the browser family, the time and the country your connection comes from. The five values above are added only if you tick the "Attach basic state" box when you answer, and the page shows them in plain words before you send. We do not store your IP address, and the survey asks for no email, name or account: no organization, no usage figures and nothing you wrote on claude.ai. Answers are stored in Cloudflare Workers KV, the storage of the service that hosts this site. Because they carry no identifier, we cannot find a single answer later to delete it.
If you join the Pro waitlist
The waitlist form at claude-monitor.com/pro is separate from the extension and optional. If you join, we store your email address, your answers to the four optional pricing questions, where you signed up from (for example the extension's popup or Settings), the time, your browser's user-agent string and the country your connection comes from. We use your email to write to you once when Pro is ready, and the pricing answers to set its price. We do not sell or share them. They are stored in Cloudflare Workers KV. To have your entry deleted, email [email protected] from that address.
This website
claude-monitor.com has no analytics and no ads, and sets no cookies of its own. One script adds a note to links to the Chrome Web Store saying roughly where your visit came from (for example "search" or "ai"). It keeps that note only in this tab's session storage and adds it to the store link when you click it; it is not sent to us. Some pages show badge images loaded from Product Hunt, Fazier, LaunchBuff and Peerlist. Cloudflare, which hosts the site, processes each request in order to deliver it.
UsagePeek AI, the Windows app by the same maker, is a separate product with its own privacy policy at usagepeek.com/privacy.
No accounts, no tracking
The extension has no user accounts, no sign-up and no registration. It does not track your browsing or read your conversations. On claude.ai it reads the usage figures described above and, with the usage bar on, only what it needs to place the bar on the page. It does not use cookies of its own.
Changes to this policy
If this policy changes, the new version is posted at this URL with its date.
Contact
Questions or concerns? Send us an email.