# NFT Marketplace The NFT owned by the user belongs to the user's personal assets from the moment of acquisition, and can be freely traded with other users. To eliminate the possibility of fraud when users trade, Pixer Sports has built a smart contract-based marketplace where users can buy and sell NFTs. Pixer Sports isn’t entitled to consume PXT directly from your decentralized wallet, so players who want to trade in the market must firstly request authorization. After authorizing the transaction, the player will receive a new payment notification. --- # 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://pixer-eternity.gitbook.io/pixer-eternity/ecosystem/nft-ino-and-trading-platform/nft-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.