# OpenSea Marketplace **OpenSea** is a marketplace for **non-fungible tokens (NFTs)**, which are unique digital objects that can represent various types of media or assets. It is the first and largest NFT marketplace built to be compatible with various blockchains, where users can create, buy, sell, and auction NFTs. To use OpenSea for buying and selling NFTs, you need to follow these steps: 1. Load up your wallet with sufficient funds. 2. Select the NFT you wish to purchase. 3. Make an offer or buy at a fixed price. 4. Pay gas fees and confirm your transaction. Alternatively, you can sell NFTs on OpenSea by navigating to your profile and clicking the “Collected” tab. Select multiple items and click “List items” at the bottom of the page. Choose the listing price for each item and the duration of the sale. OpenSea offers an intuitive and beginner-friendly user interface, which makes it easy to use and navigate. You can explore the vast array of more than 2 million NFT collections and create your own. OpenSea supports various categories of NFTs, ranging from art, music, collectibles, virtual lands, sports assets, and domain names to utility NFTs like membership passes. To get started with OpenSea, you’ll need an OpenSea account, a crypto wallet.\ \ Here’s a list of crypto wallets that OpenSea supports: * MetaMask * Coinbase Wallet (WalletLink) * Trust Wallet Connecting your wallet to OpenSea is easy. Visit OpenSea.io, navigate to the “My Wallet” section in the menu tab, and click on your wallet type. Your device will display a prompt where you can connect to the platform. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://daoversal-my-space.gitbook.io/documentation/opensea-marketplace.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.