Privacy Policy

Effective Date: June 18, 2026

1. INTRODUCTION

Sentinel ("we," "us," or "our") operates sentinelweb3.com. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our Service. Please read it carefully.

2. INFORMATION WE COLLECT

Account Information

Email address, name (optional), account credentials (hashed password).

Monitoring Data

Ethereum contract addresses you register for monitoring, alert configuration settings (webhook URLs, email addresses, alert thresholds).

Technical Data

IP address, browser type and version, device information, referring URLs, pages visited, timestamps.

Payment Information

Billed through Stripe. Sentinel does not store your credit card number or billing details — these are handled by Stripe under their Privacy Policy.

3. HOW WE USE YOUR INFORMATION

We use your information to:

• Provide, maintain, and improve the Service
• Process transactions and send related communications
• Send monitoring alerts via webhook or email as configured by you
• Respond to your requests, comments, and questions
• Monitor Service performance and usage analytics
• Comply with legal obligations

4. LEGAL BASIS FOR PROCESSING (GDPR)

If you are located in the European Economic Area, our legal basis for processing your personal data is:

• Performance of Contract: To provide the Service as requested
• Legitimate Interests: To improve the Service, prevent fraud, and ensure security
• Consent: For marketing communications (where applicable)

5. THIRD-PARTY DATA SHARING

We share your information with:

• Stripe: Payment processing. Their Privacy Policy governs their data handling.
• Ethereum RPC Providers (Alchemy, Infura, or similar): Used to query blockchain data for monitoring. Their privacy policies apply.
• Email Service Providers: Used to deliver alert emails. Your email is used solely for Service-related notifications.

We do not sell, trade, or rent your personal information to third parties for marketing purposes.

6. DATA RETENTION

We retain your personal information for as long as your account is active or as needed to provide the Service. Account data may be retained for up to 2 years after account closure for legal and tax compliance purposes. Monitoring data (contract addresses, alert history) is retained for up to 90 days after account closure.

7. YOUR RIGHTS

Depending on your location, you may have the right to:

• Access the personal information we hold about you
• Request correction of inaccurate data
• Request deletion of your personal data
• Object to or restrict certain processing
• Data portability
• Withdraw consent at any time (where processing is consent-based)

To exercise any of these rights, contact: support@sentinelweb3.com. We will respond within 30 days.

California Residents (CCPA): We do not sell your personal information. You have the right to know what data we collect and to request its deletion.

8. DATA SECURITY

We implement industry-standard security measures including TLS encryption for data in transit, access controls and least-privilege principles for internal systems, and HMAC-signed webhooks for secure alert delivery. No method of transmission over the Internet is 100% secure, and we cannot guarantee absolute security.

9. COOKIES

Sentinel may use essential session cookies necessary for Service operation. We do not use advertising or tracking cookies. You can disable cookies in your browser, but some Service features may not function properly without them.

10. CHILDREN'S PRIVACY

The Service is not intended for individuals under 18. We do not knowingly collect data from minors.

11. INTERNATIONAL DATA TRANSFERS

If you access the Service from outside the United States, your information may be transferred to and processed in the United States. We take appropriate safeguards for cross-border transfers as required by applicable law.

12. CHANGES TO THIS POLICY

We may update this Privacy Policy from time to time. Changes will be posted on this page with an updated Effective Date. We encourage you to review this policy periodically.

13. CONTACT

Sentinel · sentinelweb3.com · support@sentinelweb3.com