Minting and Listing NFTs via Manifold & OpenSea (Ethereum)
🎯 Course Objectives
By the end of this module, learners will:
Upload artwork and metadata to Manifold Studio
Mint NFTs under their own smart contract
List NFTs for sale on OpenSea
Understand the interoperability between Manifold and major NFT marketplaces
Primary Blockchain: Ethereum
Tools/Platforms: Manifold Studio, MetaMask, OpenSea
🧰 Step-by-Step Guide
1. Connect MetaMask to Manifold Studio
Navigate to Manifold Studio and click "Connect Wallet" in the center of the page.
Select MetaMask and authorize the connection.
Ensure you have deployed a smart contract. If not, refer to the previous module on deploying a smart contract with Manifold.
2. Mint an NFT

From your Manifold dashboard, select your deployed contract.
Select the contract you will be minting into or create a new contract.
Upload your artwork file (supported formats include JPG, PNG, GIF, MP4, etc., up to 300 MB).
Add a title and description for your NFT.
Optionally, add properties or attributes to your NFT.
Click "Mint" and confirm the transaction in MetaMask to mint your NFT.
Note: Ensure you have sufficient ETH in your wallet to cover gas fees.
3. List NFT on OpenSea
Navigate to OpenSea and connect your MetaMask wallet.
Click on your profile icon and select "Profile" to view your collected NFTs.
Locate the NFT you minted via Manifold and click on it.
Click the "Sell" button in the top-right corner.
Choose your preferred sale method:
Fixed Price: Set a specific price for immediate purchase.
Timed Auction: Set a starting price and allow buyers to place bids over a set duration.
Set the duration for the listing.
Click "Complete listing" and confirm the transaction in MetaMask.
Note: OpenSea charges a 2.5% fee on the sale price.
date published
reading time
3 min read