Privacy Policy

Overview

CryptoSentinel is a browser extension that displays publicly available cryptocurrency market data. It does not collect, store, or transmit personal information to any backend operated by us.

Data Collection

We do not operate analytics, telemetry, user accounts, or backend data collection for CryptoSentinel.

Local Storage

Your watchlist, alert settings, API keys, and notification preferences are stored locally in your browser using chrome.storage.local. This data remains on your device unless you explicitly send a notification through an optional third-party service that you configure.

Third-Party Data Providers

CryptoSentinel fetches public market data directly from these providers:

• CoinGecko - cryptocurrency prices and market data
• Binance - real-time prices, liquidations, funding rates, and chart data
• Bybit - liquidation data
• Alternative.me - Fear & Greed Index
• DefiLlama - token unlock schedules
• Etherscan - on-chain transaction data, using a user-provided API key

These requests are made directly from your browser. We do not proxy or relay them through our own servers.

Optional Notification Services

If you enable phone notifications, the extension can send alert messages to:

• ntfy.sh
• Telegram Bot API

These services are optional and user-configured. Tokens, topics, and chat IDs are stored locally in the browser.

Permissions

• alarms - checks alert conditions in the background
• storage - saves local preferences and alerts
• notifications - displays desktop notifications

Children's Privacy

CryptoSentinel is not directed to children under 13 and does not knowingly collect personal information from children.

Changes

We may update this policy from time to time. The latest revision date will always appear at the top of this page.

Contact

If you have questions about this policy, contact support@deerrockstudios.com.