Privacy Policy

Effective date: April 2026

Seller Signal (“we”, “our”, “us”) provides tools to help eBay sellers assess buyer risk and manage transactions.

1. Overview

• We do not sell personal data
• We minimise data collection
• Most data is stored locally in your browser
• Sensitive tokens are stored securely server-side

2. Information We Collect

2.1 Account Information

• Email address (if you sign up)
• Authentication data (via Supabase)

2.2 eBay OAuth Connection

• eBay OAuth refresh token
• eBay user identifier

Used only to retrieve feedback data via eBay APIs.

2.3 Buyer Data (Extension)

• eBay usernames
• Feedback statistics

This data is stored locally in your browser (chrome.storage).

2.4 Blocklist Data

Stored locally only and not sent to our servers.

2.5 Usage Data

• Error logs
• Performance metrics

3. How We Use Data

• Display buyer risk indicators
• Calculate feedback statistics
• Enable blocklist tools
• Improve performance

4. Data Storage

Local: stored in your browser

Server: OAuth tokens only

5. Data Sharing

We do not sell data.

Data is only shared with:

• eBay APIs
• Supabase

6. Legal Basis

Legitimate interest (fraud prevention) and user consent.

7. Data Retention

• Local data: until cleared
• OAuth tokens: until revoked

8. Your Rights

You have the right to access, delete, or request your data. Contact: privacy@seller-signal.com

9. Security

We use encryption and secure storage practices.

10. Third Parties

We rely on eBay APIs and Supabase.

11. Changes

This policy may be updated periodically.

12. Contact

Email: privacy@seller-signal.com