OpenSea Stream API is an NFT API tool launched in beta by OpenSea on May 6, 2022, that allows developers to receive events on OpenSea marketplace in real time.  Developers can use Stream API to get event alerts on sales, listings, transfers, and offers on an item. With these real-time feeds, developers can build features that require up-to-date information such as push notification services to alert users on new bids or a live dashboard for recording key trends.