how to query an opensea/NFT token in ethers ?

[sandys]

https://metamask.zendesk.com/hc/en-us/articles/360058238591-NFT-tokens

this is how one queries a NFT token in metamask:

Find the NFT's address. On OpenSea, for example, on the NFT's page under Details, there is a blue hyperlinked value labelled "Contract Address". If you click on this, it will take you to the contract's address on Etherscan; at the top-left of that page, there should be an icon labelled "Contract", and to the right, a long string of letters and numbers. This is the address of the contract that created your NFT. Click on the "copy" icon to the right of the address, and you'll have it on your clipboard.

In MetaMask Mobile, tap on the 'NFTs' tab, scroll down and tap on the "+ ADD NFTs" link. Paste the NFT's address from your clipboard into the "Address" box.

Find the NFT's ID. A collectible's ID is a unique identifier since no two NFTs are alike. Again, on OpenSea this number is under "Details". Make a note of it, or copy it onto your clipboard.

Paste the ID into the box marked "ID" in MetaMask Mobile, tap on the "ADD" button, and your NFTs should appear under the NFTs tab.

I want to replicate the same functionality in ethers. Be able to query and get details of an OpenSea NFT token directly from the blockchain. Including the asset url (image, etc). Has anyone done this ? i have not been able to find any example of the same.

[zemse]

The note that you have mentioned seems to be for user interface. To do that using code, you should supply the "Contract Address" of the NFT to ethers, and you should be able to obtain that from OpenSea contracts/infrastructure (Metamask should be doing the same). Can you have a look at the OpenSea docs https://docs.opensea.io they have an API section.