Overview
Crypto portfolio: Blockchain & Crypto tracker is a browser extension designed to bring real-time, on-chain cryptocurrency insights and basic NFT exploration to your Chrome toolbar. Created by an individual developer (Marty_cFly), the extension focuses on fast access to portfolio values, trending tokens, and large transactions (“whales”) without requiring a separate dashboard or web application. It pulls data from trusted public APIs—CoinGecko for market data and Etherscan for on-chain activity—and offers optional API key support to improve response speed.
Core Features
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Personal Portfolio Management: Add and track selected coins and tokens, monitor the value of your specific holdings in real time, and view quick snapshots of portfolio performance.
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Account Alerts: Receive hourly updates for monitored Ethereum and Base accounts, including notifications for activity by industry leaders and whale addresses so you can follow major moves.
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Trending Coins & Tokens: A dynamic list of the most searched or quickly moving assets, presented with real-time data to help users spot momentum and emerging opportunities.
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Whale Finder: An on-chain analytical tool that scans the last 10,000 transactions for a given coin and surfaces the top 50 transactions by size, providing visibility into large transfers and market-moving activity.
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NFT Info: Basic NFT market summaries that show recent prices and daily transaction volumes for well-known collections, helping users get a quick sense of NFT market activity.
How it works
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The extension aggregates market pricing from CoinGecko and on-chain transaction details from Etherscan. These APIs power the extension’s charts, trend lists, and whale detection logic.
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Navigation is optimized for quick keyboard use: Arrow and Tab keys let you move between options and charts for a faster browsing experience.
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Users can enter their own API keys to reduce rate limits and get faster, more consistent data responses. The developer recommends adding an API key for faster results.
Privacy & Security
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The developer declares that the extension does not collect or use your data and that data is not sold to third parties. Data handling is limited to use cases required for core functionality, and the developer states no transfers for unrelated uses or creditworthiness determinations.
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Because the extension reads on-chain data (public blockchain transactions), it does not require personal private keys to function. Nonetheless, users should avoid entering private keys or sensitive credentials into third-party tools.
Why choose this extension
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It provides a compact, browser-native way to watch both market and on-chain activity without switching apps.
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The Whale Finder and hourly Account Alerts are useful features for traders and researchers who monitor large addresses and influential accounts.
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The combination of portfolio snapshots, trending tokens, and NFT summaries makes it suitable for users who want a single quick-access tool for multiple crypto data needs.
Getting started
- Install the extension from the Chrome Web Store.
- Optionally add your CoinGecko/Etherscan API key in the extension settings for improved performance.
- Add coins to your portfolio, enable account alerts for addresses you wish to follow, and use hotkeys to quickly navigate charts and lists.
Support and updates
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The extension is maintained by Marty_cFly (contact via martijnpublicdev@gmail.com or X: @Marty_cFly).
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Current version: 2.0.18 (updated December 30, 2024). If you encounter issues, consult the support hub linked on the store page or check the troubleshooting guide for installation problems.
Overall, Crypto portfolio: Blockchain & Crypto tracker is a focused, privacy-forward extension for Chrome users who want a lightweight, real-time companion for portfolio monitoring, on-chain exploration, and NFT quick checks.
