This page is designed for developers who have already written their ERC721 contract and wish to integrate it with OpenSea. However, if you're starting fresh, we recommend following the official OpenSea Developer Tutorial.
For OpenSea to pull in off-chain metadata, we need an API to find metadata. To do this, we typically use the
tokenURI method in ERC721 (you can learn about exactly how this works here. However, if you've already deployed your contract and didn't implement this method, you can send an API URL to [email protected] that conforms to the metadata standards and has the format:
While your API can have any URL, it is important that it takes in a token ID and returns data in the format described here.