NFT Underpriced Listing Detector

WHAT IT DOES

NFT Underpriced Listing Detector watches the current page for NFT listings and compares each listing price against an estimated fair market value based on collection floor price, trait rarity, and historical sales data visible on the page, then identifies and alerts on listings priced significantly below their estimated value. The tool helps you find undervalued NFTs that may represent good buying opportunities.

WHERE IT RUNS

This tool works on any webpage that displays NFT listings with prices and trait data, including NFT marketplaces, collection pages, and trading platforms. It automatically detects floor prices, listing prices, and trait information from page content. The script runs on all websites as designated in its match patterns.

HOW TO USE

After installing the BotGentz extension, navigate to any NFT collection or listing page. Click the NFT Underpriced Listing Detector icon in your browser toolbar or use the keyboard shortcut (Alt+U). The panel will open. Click "Connect Wallet" to connect your real EVM wallet extension—this provides network context. Configure your discount threshold percentage and minimum discount in ETH. Toggle auto-alerts on discovery, desktop notifications, and sound alerts. Click "Scan Now" to analyze all visible listings. The tool estimates fair value for each listing based on the collection's floor price and trait bonuses, then identifies listings priced below their estimated value. Results appear in the panel showing the listing ID, listed price, estimated value, and discount percentage. Click "Start Auto-Scan" to enable continuous monitoring. Use "Stop Auto-Scan" to pause scanning.

TECHNICAL SECTION — FLOOR-BASED VALUE ESTIMATION WITH TRAIT BONUSES

Unlike simple price comparison tools that only check against floor price, this tool uses a floor-based value estimation engine with trait bonuses. It first detects the collection floor price from the page using multiple strategies. For each listing, the engine extracts trait data and calculates a fair value estimate using a weighted formula: the floor price serves as the base value, with trait bonuses applied based on the number and rarity of traits visible on each NFT. The bonus is calibrated to reflect that NFTs with more traits tend to be more valuable. The engine then compares the listing price against the estimated fair value, calculating both the absolute discount and the percentage discount. Listings meeting the configured discount threshold and minimum discount are flagged as underpriced. This approach provides a practical, data-driven estimate of fair value that goes beyond simple floor price checks, helping you identify genuine bargains rather than just low-priced listings.

THE PANEL

The panel is draggable anywhere on the screen and remembers its position per site. It can snap to the left, right, top, or bottom edges, or float freely. Collapse it to a small status indicator when you need more page visibility, and expand it again with a single click. Resize it vertically or horizontally to show more results. Press Escape to close the panel instantly. All settings (discount threshold, min discount, scan interval, auto-alerts, notifications, sound) are saved globally and persist across sessions.

PLEASE NOTE

This tool requires the free BotGentz extension and a real EVM wallet extension already installed in your browser. EVM chains only—supports Ethereum Mainnet, Polygon, Arbitrum, and Optimism. Wallet connection is read-only; this tool never initiates transactions or signs messages. Cannot access historical sales data not visible on the current page, cannot estimate fair value for NFTs without sufficient visible data, cannot detect underpriced listings that require manual page interaction to display, and cannot compare against off-platform sales data. Users must manually verify underpricing and conduct their own research before purchasing any NFTs. Value estimates are approximations based on visible data and may not reflect actual market conditions. Websites change their layouts frequently; scripts may need updates, and we work to keep them current but cannot guarantee uninterrupted operation.