OpenSea

OpenSea is a marketplace for buying, selling and placing non-fungible tokens. Marketplace appeared in 2017 and since then has become the most popular NFT-marketplace in the world. OpenSea is a decentralized community where users can exchange tokens and sell and buy NFTs. The OpenSea protocol uses ERC721 and ERC1155 tokens.

OpenSea offers tokens with art, music, domain names, virtual worlds, and other NFT categories. The marketplace also has statistics showing the most popular tokens and their value. This is an ar​ticle from project CryptoDeFix. The token page shows its value, description, accessories, and details of the pictured character. To create their own NFT, the user needs to upload a file under "Create" and fill in the details of the item, and pay gas for the placement.

To start buying or selling NFTs, the user has to connect a web3 wallet. You can pay for collection items with any ERC20 tokens, for each purchase the user pays a commission of 2.5%. The value of the item is denoted in Ethereum.

OpenSea specifics

• Buying, creating and selling NFTs
• Connection to the platform via web3 wallet
• Filter of collections
• 2.5% fee
• Support for Ethereum, Polygon and Klaytn Blockchain protocols