METENGINE
Privacy Policy for Met Extension
Effective Date: January 31, 2025
Last Updated: January 31, 2025
Version: 2.0
1. Introduction
MetEngine and its affiliates (together, “MetEngine”, “we”, “us” or “our”) respect your privacy and are committed to protecting your personal data. This privacy policy explains how we collect, store, and use information when you use the MetEngine browser extension.
This privacy policy is incorporated by reference into our Terms of Use. By using our services, you agree to the terms of this privacy policy. If you do not agree, please do not use our services.
Table of Contents
- 1. Introduction
- 2. Important Information and Who We Are
- 3. Summary of Data Collection
- 4. What We Collect
- 5. What We Do NOT Collect
- 6. How We Use Your Data
- 7. Data Transmission
- 8. Data Storage and Security
- 9. Data Sharing
- 10. Your Rights
- 11. Children's Privacy
- 12. International Transfers
- 13. Changes to This Policy
- 14. Contact
- 15. Purposes and Legal Basis for Processing
- 16. Your Legal Rights
- 17. Cookies and Similar Technologies
- 18. Third-Party Links
- 19. Additional Info for U.S. Residents
- 20. Additional Info for EU/UK Residents
- 21. Glossary
- 22. Changelog
2. Important Information and Who We Are
Purpose. This policy explains how MetEngine collects and processes your data through your use of the MetEngine browser extension.
Controller. MetEngine Labs is the controller responsible for your personal data.
Contact Details:
- Email: hello@metengine.xyz
- Website: https://metengine.xyz
Changes to this policy. We may modify this policy at any time. Changes will be posted on this page with an updated date. Continued use after changes constitutes acceptance.
3. Summary of Data Collection
MetEngine is a trading analytics extension. We collect the minimum data needed to operate. This policy explains exactly what we collect, why, and how it's protected.
| Data Type | Collected | Purpose | Sent to Server |
|---|---|---|---|
| Invite code | Yes | License activation | Yes |
| Device fingerprint | Yes | License binding (anti-piracy) | Yes (hashed) |
| Pool/market addresses you view | Yes | Fetch analytics for that pool/market | Yes |
| Wallet addresses displayed on platforms | Yes | Fetch smart wallet scores | Yes |
| Your wallet address | No | — | — |
| Private keys | No | — | — |
| Browsing history | No | — | — |
| Personal information | No | — | — |
4. What We Collect
4.1 License Authentication Data
| Data | What It Is | Why We Collect It |
|---|---|---|
| Invite Code | Your license key (e.g., BETA-XXXX-XXXX-XXXX) | Verify your subscription |
| Device Fingerprint | Hashed combination of browser/device properties | Bind license to one device to prevent unauthorized sharing |
About Device Fingerprinting:
We generate a SHA-256 hash from these properties:
- User agent string
- Screen resolution and color depth
- Timezone offset
- Hardware concurrency (CPU cores)
- Device memory
- Canvas rendering characteristics
- WebGL renderer information
Why we use fingerprinting: To ensure one license = one device. This prevents license sharing and piracy. The fingerprint is:
- One-way hashed (cannot be reversed to identify you)
- Never shared with third parties
- Only compared against stored hashes for license verification
- Not used for tracking across websites
4.2 Platform Data (Functional Collection)
When you use MetEngine on supported platforms, we collect identifiers needed to fetch analytics:
On Meteora (meteora.ag):
| Data | Example | Why |
|---|---|---|
| Pool address | 5yuefgb... | Fetch LP positions and analytics for that specific pool |
On Polymarket (polymarket.com):
| Data | Example | Why |
|---|---|---|
| Market condition ID | 0x1234... | Fetch smart money positions for that market |
| Wallet addresses displayed on page | 0xabcd... | Fetch wallet scores for profiles you view |
On Hyperliquid (hyperliquid.xyz):
| Data | Example | Why |
|---|---|---|
| Asset symbol | BTC, ETH | Fetch trading pressure data for that asset |
Important clarifications:
- We only collect identifiers for content you actively view
- We do NOT collect your personal wallet address unless you explicitly view your own profile
- We do NOT monitor pages in the background
- We do NOT collect data from websites outside the three supported platforms
4.3 Session Data
| Data | Storage | Purpose |
|---|---|---|
| JWT authentication token | Local browser storage | Maintain logged-in state |
| Cached API responses | Local browser storage | Reduce network requests, improve performance |
5. What We Do NOT Collect
We explicitly do not collect:
- Your cryptocurrency wallet addresses (unless you view your own profile)
- Private keys or seed phrases
- Transaction signing requests
- Passwords or credentials for any platform
- Browsing history outside supported platforms
- Keystrokes, mouse movements, or clicks
- Location data (GPS or IP-based)
- Personal identification (name, email, phone)
- Financial data (bank accounts, credit cards)
- Communication content (emails, messages)
6. How We Use Your Data
| Use Case | Data Used | Legal Basis |
|---|---|---|
| License verification | Invite code + device fingerprint | Contract fulfillment |
| Deliver analytics | Pool/market/wallet identifiers | Contract fulfillment |
| Prevent piracy | Device fingerprint | Legitimate interest |
| Improve performance | Cached responses | Legitimate interest |
We do NOT use your data for:
- Advertising or marketing
- Selling to third parties
- Building user profiles for targeting
- Credit assessment or lending decisions
- Any purpose unrelated to delivering analytics
7. Data Transmission
7.1 Our Servers
All data is transmitted to MetEngine servers over encrypted HTTPS connections:
| Endpoint | Data Sent | Purpose |
|---|---|---|
| extension.metengine.xyz | Invite code, device fingerprint, session token | Authentication |
| api.metengine.xyz | Pool addresses, market IDs | Fetch analytics data |
| dca.metengine.xyz | Token addresses | Fetch pressure data |
7.2 Third-Party APIs
We also communicate with platform APIs to enrich data:
| Service | Data Sent | Purpose |
|---|---|---|
| gamma-api.polymarket.com | Market IDs | Fetch public market metadata |
| clob.polymarket.com | Market IDs, wallet addresses | Fetch public order book data |
Note: These are official platform APIs. We only request publicly available data.
7.3 What We Do NOT Send
- Your browsing activity outside supported platforms
- Your cryptocurrency wallet private keys
- Any data to advertising networks
- Any data to data brokers
8. Data Storage and Security
8.1 Local Storage (Your Browser)
| Data | Retention | Security |
|---|---|---|
| Session tokens | Until sign out or expiration | Chrome Storage API (encrypted at rest) |
| Cached responses | 24 hours maximum | Automatically purged |
| User preferences | Until uninstall | Chrome Storage API |
8.2 Server Storage (Our Infrastructure)
| Data | Retention | Security |
|---|---|---|
| License records | Subscription duration + 90 days | Encrypted database |
| Device fingerprints | Subscription duration + 90 days | SHA-256 hashed, not reversible |
| API request logs | 30 days rolling | No personally identifiable information |
8.3 Security Measures
- All transmissions use TLS 1.3 encryption
- Device fingerprints are one-way hashed before transmission
- No plain-text storage of sensitive data
- Regular security reviews
- Principle of least privilege for server access
9. Data Sharing
We Share Data With:
| Recipient | Data | Purpose |
|---|---|---|
| Our backend infrastructure | Hashed device ID, license code | Authentication only |
| Platform APIs (Polymarket) | Public identifiers | Enrich analytics data |
We Do NOT Share Data With:
- Advertisers
- Data brokers
- Analytics companies
- Marketing platforms
- Any third party for commercial purposes
Legal Disclosure
We may disclose data if required by:
- Valid court order
- Law enforcement request with proper legal process
- To protect our legal rights
We will notify you before disclosure when legally permitted.
10. Your Rights
10.1 Access Your Data
View what the extension stores locally:
- Open Chrome DevTools (F12)
- Go to Application → Storage → Extension Storage
- Select the MetEngine extension
10.2 Delete Your Data
Local data: Sign out from the extension popup, or uninstall the extension.
Server data: Email hello@metengine.xyz with subject “Data Deletion Request” including your invite code. We process requests within 30 days.
10.3 Opt Out
The extension only collects data necessary for core functionality. To opt out:
- Disable or uninstall the extension
- Contact us to revoke your license
11. Children's Privacy
MetEngine is not intended for users under 18. We do not knowingly collect data from minors. Contact us if you believe a minor has used our service.
12. International Transfers
Our servers may be located outside your country. By using MetEngine, you consent to data transfer to jurisdictions where data protection laws may differ from your own.
13. Changes to This Policy
We will:
- Update this page with a new “Last Updated” date
- Notify users via the extension popup for material changes
- Maintain a changelog of significant updates
Continued use after changes constitutes acceptance.
14. Contact
- Email: hello@metengine.xyz
- Website: https://metengine.xyz
- Support: https://metengine.xyz/support
15. Purposes and Legal Basis for Processing
| Purpose | Data Used | Legal Basis |
|---|---|---|
| Provide analytics services | Pool addresses, market IDs, wallet addresses viewed | Performance of contract |
| License verification | Invite code, device fingerprint | Performance of contract |
| Prevent license sharing | Device fingerprint | Legitimate interest |
| Improve services | Aggregated usage data | Legitimate interest |
| Respond to support requests | Email, correspondence | Legitimate interest |
We will only use your data for the purposes for which we collected it. If we need to use it for a different purpose, we will notify you and explain the legal basis.
16. Your Legal Rights
Under data protection laws, you have the right to:
| Right | Description |
|---|---|
| Access | Request a copy of the personal data we hold about you |
| Correction | Request correction of incomplete or inaccurate data |
| Erasure | Request deletion of your personal data |
| Objection | Object to processing based on legitimate interests |
| Restriction | Request restriction of processing |
| Portability | Request transfer of your data |
| Withdraw consent | Withdraw consent where we rely on it |
To exercise any of these rights, contact us at privacy@metengine.xyz.
No fee required. You will not have to pay a fee to exercise your rights. However, we may charge a reasonable fee for clearly unfounded or excessive requests.
Response time. We will respond to legitimate requests within one month.
18. Third-Party Links
Our extension may display links to third-party websites (such as Solana explorers or trading platforms). We are not responsible for the privacy practices of these third parties. We encourage you to read their privacy policies.
19. Additional Information for U.S. Residents
If you reside in California or another U.S. state with privacy laws, you may have additional rights. We do not “sell” or “share” personal information as defined under these laws. We do not use personal information for “targeted advertising.”
20. Additional Information for EU/UK Residents
If you reside in the EU or UK, you have additional rights under GDPR/UK GDPR. The legal bases for our processing are set out in Section 15. You have the right to lodge a complaint with your local data protection authority.
21. Glossary
| Term | Definition |
|---|---|
| Personal data | Any information relating to an identified or identifiable person |
| Controller | The entity that determines the purposes and means of processing |
| Legitimate interest | Our business interest in operating and improving our services, balanced against your rights |
| Device fingerprint | A hash of device characteristics used to identify a specific device |
22. Changelog
| Version | Date | Changes |
|---|---|---|
| 2.0 | Jan 31, 2025 | Complete rewrite with explicit data collection, GDPR structure, legal bases |
| 1.0 | Jan 15, 2025 | Initial policy |
MetEngine Labs
Transparent analytics for informed trading.