NFT Collection Offer Maker

WHAT IT DOES

NFT Collection Offer Maker watches the current page for NFT collection data, reads the collection floor price, total supply, and owner distribution from the contract via eth_call, and provides a one-click interface to create collection-wide offers at a specified price, with options to set offer duration, minimum token ID, and maximum budget. It helps you make offers across an entire NFT collection efficiently.

WHERE IT RUNS

This tool operates as a userscript within the BotGentz extension framework, running directly in your browser on any website. It works on any EVM-compatible blockchain page—Ethereum, Polygon, Arbitrum, Optimism, and more—where NFT marketplaces support collection offers. The tool integrates seamlessly into your workflow, appearing as a draggable panel that stays accessible as you make NFT offers.

HOW TO USE

Enter the marketplace contract address and the NFT collection address in the "Contract Setup" section. Set your offer price per NFT, offer duration, maximum number of offers, and minimum token ID. Set the refresh interval and toggle auto-submit on or off. Click "Connect & Load Collection" to connect your real wallet extension, which will begin loading collection data at your specified interval. The panel displays your wallet balance, budget status, total supply, floor price, offer count, offer price, and total cost. Use "Make Offers" to create collection-wide offers, "Refresh Data" for an immediate update, or "Stop Monitoring" to disconnect.

TECHNICAL OPERATION

NFT Collection Offer Maker uses raw JSON-RPC calls via window.ethereum.request() to interact with the blockchain. It loads ethers at runtime using a simple script tag injection for ABI encoding and contract interactions. The tool reads the collection total supply using eth_call with totalSupply. It reads the floor price from the marketplace contract using eth_call with a price view function. The tool checks the user's wallet balance using eth_getBalance and calculates affordability based on the offer price and maximum number of offers. When offers are executed, the tool submits transactions in sequence to create collection-wide offers. The tool tracks transaction confirmations and reports the status. The tool supports configuring offer duration, minimum token ID, and maximum offers for precise control.

THE PANEL

The NFT Collection Offer Maker panel is fully draggable and remembers its position between sessions using GM_setValue. It snaps to the edge of the viewport for a clean interface and can be collapsed to a small icon when not in use. The panel is resizable to accommodate longer content. Press Escape to quickly close or collapse the panel. The design is optimized for productivity with a dark theme, clear visual hierarchy, and responsive controls that adapt to your workflow.

PLEASE NOTE

This tool requires the free BotGentz extension installed in your browser and a real EVM wallet extension (MetaMask, Rabby, etc.) already installed. EVM chains only—this does not work on non-EVM blockchains. The tool cannot read collection data if the contract does not expose a view function for it, cannot create offers if the marketplace does not support collection offers, cannot execute if the user lacks sufficient funds, and cannot predict if offers will be accepted. No private keys are stored or transmitted—all signing happens directly through your wallet extension. Always verify the offer price and total cost before executing.