Privacy Policy
Last updated: May 4, 2026
1. Overview
Claude Tuner is a Chrome extension ("the Extension") and web dashboard ("the Dashboard") that monitors your Claude.ai usage metrics and provides analytics. This privacy policy explains what data we collect, how we use it, and your rights regarding that data.
Claude Tuner is not affiliated with, endorsed by, or officially connected to Anthropic, PBC.
2. Data We Collect
| Data | Purpose | Storage |
|---|---|---|
| Google account email | User authentication & account identification | Server (Cloudflare D1) |
| Google account name | Display name on dashboard (collected only via Google Sign-In, not from Claude.ai) | Server (Cloudflare D1) |
| Google profile picture URL | Avatar display on dashboard (collected only via Google Sign-In) | Server (Cloudflare D1) |
| Claude.ai usage rates | 5-hour and 7-day utilization percentages, including per-model breakdown (e.g., Opus, Sonnet) | Server + Local (chrome.storage) |
| Reset timestamps | Countdown timers for usage window resets | Server + Local |
| Subscription plan | Plan-specific token estimation and recommendations | Server + Local |
| Subscription details | Renewal date, pending plan changes, subscription pause status | Server |
| Privacy setting | Whether "Improve Claude" data sharing is enabled in your Claude.ai account | Server |
| Timezone & language | Localized dashboard experience and timezone-accurate reporting | Server |
| Rate limit tier | Internal plan identifier for accurate plan detection | Server |
| Organization membership | Organization name and ID from your Claude.ai account for per-workspace usage tracking | Server |
| Extra usage & spending | Additional usage allowance, limits, and spending amounts from your Claude.ai account | Server + Local |
| Extension version | Installed extension version for compatibility and debugging | Server |
3. Data We Do NOT Collect
- Conversation content or messages on Claude.ai
- Personal files or documents
- Browsing history on any website
- Passwords or authentication tokens for Claude.ai
- Payment or billing information
- Any data from other websites
4. How We Collect Data
The Extension collects usage data by calling Claude.ai's internal usage API endpoint from within your authenticated browser session. This is the same data displayed on Claude.ai's own usage interface. Data is collected:
- Automatically at regular intervals (default: every 5–10 minutes, configurable by server)
- When you visit or return to a Claude.ai tab
- When you manually click the "Collect" button
- At increased frequency when usage is rising rapidly (adaptive boost mode)
- When a 429 (rate limit) response is detected on Claude.ai via the
webRequestAPI — only the HTTP status code is observed, no request or response content is read
5. Claude.ai API Endpoints Accessed
The Extension only accesses the following Claude.ai API endpoints. It does not access any conversation, message, or chat-related endpoints.
| Endpoint | Purpose |
|---|---|
/api/account | Email and privacy settings |
/api/organizations | Organization list and plan detection |
/api/organizations/{id}/usage | 5h/7d utilization rates |
/api/organizations/{id}/subscription_details | Subscription info and renewal date |
/api/organizations/{id}/paused_subscription_details | Paused subscription check |
/api/organizations/{id}/upgrade_to_max | Plan upgrade (with user consent) |
/api/organizations/{id}/downgrade_individual_claude_subscription | Plan downgrade (with user consent) |
/api/organizations/{id}/cancel_subscription_downgrade | Cancel scheduled downgrade (with user consent) |
You can verify this yourself by inspecting the Extension's source code — it is shipped unobfuscated — or by monitoring network requests in Chrome DevTools.
6. Open Source & Code Transparency
Claude Tuner's extension source code is fully open source under the MIT license:
github.com/chaehyun2/claudetuner
- No build step — the source files in the repository are byte-for-byte identical to the Chrome Web Store package. There is no minification, bundling, or obfuscation.
- No conversation access — the extension never calls any
/api/chat,/api/messages, or conversation-related endpoint. It only reads usage percentages and reset timestamps. You can confirm this by searching the entire codebase forfetchcalls. - Enterprise audit-friendly — security teams can review the complete source code, compare it against the installed extension, and verify that no data beyond usage metrics is transmitted.
7. How We Use Data
Collected data is used solely to:
- Display real-time usage metrics in the extension popup
- Render historical charts and trends on the web dashboard
- Calculate estimated token usage
- Provide subscription plan recommendations
- Predict when usage limits may be reached
- Enable optional data sharing with users you explicitly authorize
8. Data Storage & Security
Server-side data is stored on Cloudflare Workers D1 (SQLite), a globally distributed database service. All communication between the Extension and our server uses HTTPS encryption.
Local data is stored in chrome.storage.local and remains on your device.
9. Data Sharing
We do not sell, rent, or share your data with third parties for marketing or advertising purposes.
The service includes optional data sharing features: you may share your usage data with specific users by email, and if you join a team (organization), your usage data may be visible to team administrators and members. You control your sharing preferences and can revoke access at any time through the Dashboard.
10. Third-Party Services
| Service | Purpose | Privacy Policy |
|---|---|---|
| Google Sign-In | Authentication | Google Privacy Policy |
| Cloudflare Workers | Server & database hosting | Cloudflare Privacy Policy |
| Resend | Transactional email delivery (reports, invitations) | Resend Privacy Policy |
| Google Analytics | Anonymous website and extension usage analytics | Google Privacy Policy |
11. Data Retention
Usage snapshots are retained on our server for as long as necessary to provide historical trend analysis. You may delete your account and all associated data at any time through the Dashboard settings page. Upon deletion, a minimal record (email and deletion timestamp) may be retained for abuse prevention and legal compliance.
Local data stored in the Extension can be cleared by uninstalling the Extension or clearing extension data in Chrome settings.
12. Your Rights
You have the right to:
- Access your data via the web dashboard
- Delete your account and all associated data through the Dashboard settings page
- Revoke data sharing permissions at any time
- Opt out of weekly email reports via the Dashboard settings page
- Uninstall the Extension at any time to stop all data collection
13. Children's Privacy
Claude Tuner is not intended for use by children under the age of 13. We do not knowingly collect personal information from children.
14. Changes to This Policy
We may update this Privacy Policy from time to time. Changes will be posted on this page with an updated "Last updated" date. Continued use of the service after changes constitutes acceptance of the updated policy.
15. Contact
If you have questions about this Privacy Policy or wish to request data deletion, please contact:
Email: [email protected]