The BTC Mempool Fee Rate Tracker is a Chrome browser extension designed to help users monitor Bitcoin transaction fees in real-time. Utilizing the mempool.space API, this tool provides current recommended fee rates directly to the user, enabling informed decisions when sending Bitcoin. The extension features a pop-up interface that displays all recommended fees, along with the time since the last block was mined, ensuring users have access to the latest information at their fingertips.

In addition to real-time fee tracking, the extension offers a chart that visualizes fee rates over the previous 24 hours, allowing users to analyze trends and make better choices based on historical data. This free add-on is categorized under Browsers and specifically falls into the Add-ons & Tools subcategory, making it a convenient and valuable resource for anyone engaged in Bitcoin transactions.