NFT Floor Price Tracker

WHAT IT DOES

NFT Floor Price Tracker analyzes on-chain sales data from major NFT marketplaces to estimate the current floor price for any ERC-721 collection. Enter a contract address, and the tool scans recent marketplace events — such as order fills and inventory changes — to identify token sales and their prices. It displays the estimated floor price (the lowest price among recent sales), 24-hour trading volume, total number of sales analyzed, and a detailed list of recent transactions with timestamps and transaction hashes. The tool also shows the collection name, symbol, and total supply for context.

HOW TO USE

Connect your wallet using the BGWallet bridge (MetaMask or any Web3 wallet). Ensure you are on the same network as the NFT collection — Ethereum, BNB Chain, Polygon, Arbitrum, Optimism, Base, or any EVM chain. Enter the NFT contract address in the input field. Click "Track floor price" to start the analysis. The tool will scan the blockchain for marketplace event logs from the last 24 hours (and beyond), extract sale prices, and calculate the floor price. Results are displayed with the floor price, 24h volume, total sales count, and a table of recent transactions with their prices and timestamps.

TECHNICAL MECHANISM

The tool listens for known marketplace event signatures using eth_getLogs. It currently indexes events from major marketplaces like OpenSea (Seaport) and LooksRare, with support for additional platforms planned. The tool constructs filters for these event signatures and fetches logs from block 0 to the latest block using a chunked scanning strategy (PLAYBOOK-C §5.1) to respect RPC limits. Because public RPCs cap the number of blocks that can be queried in a single eth_getLogs request, the tool walks forward in configurable chunks (default 100,000 blocks). If a chunk request fails due to RPC limits, the tool halves the chunk size and retries, continuing until the entire range is scanned. For each log found, the tool extracts the sale price from the log data (using the known event structure for each marketplace) and records the transaction hash and block timestamp. Sales from the last 24 hours are filtered to calculate the 24-hour volume and the most recent floor price. The floor price is determined by sorting all identified sales by price ascending and taking the lowest. The tool does not rely on external APIs or indexers — all data comes directly from the blockchain through your wallet provider.

WHAT IT CANNOT SEE

The tool cannot detect sales on marketplaces that are not indexed in its event signature list — it currently supports a limited set of major marketplaces. It cannot calculate an accurate floor price for collections with low liquidity or infrequent trades (less than a handful of sales in the past 24 hours), as the floor price may be stale or based on outdated data. It cannot distinguish between genuine sales and wash trades, fake volume, or manipulative transactions — all sales events are treated equally. It cannot predict future floor price movements or provide price recommendations. It cannot detect private sales, peer-to-peer transfers, or sales conducted through aggregators that use proxy contracts. It cannot show the current listing prices on marketplaces — only completed sales. The tool is read-only and does not sign any transactions.

PLEASE NOTE

This tool works exclusively on EVM-compatible chains (Ethereum, BNB Chain, Polygon, Arbitrum, Optimism, Base, Avalanche C-Chain, Fantom, and others). Solana, Tron, Starknet, SUI, TON, Aptos, Bitcoin, Cosmos, and XRP are not supported. The tool only supports ERC-721 NFT collections — ERC-1155 is not supported. Marketplace event signatures may change over time; the tool indexes a fixed set of known signatures and may miss sales on newer or less common marketplaces. Performance depends on the chain's transaction volume and the collection's trading activity. The tool does not store any data — all reads happen live from the blockchain through your wallet provider. The tool is provided as-is with no warranty or liability. Always verify contract addresses from trusted sources.