I'm researching about how can I allow my users mint NFTs on Polygon network from my website (done), and to list those items in Opensea (in Polygon Network).

I was researching the Opensea SDK but it seems to work only with Ethereum, and not with Polygon.

I have also been checking the Opensea API but I only find methods to make orders, but not to list for sale. I've been reading about Seaport contract, but I do not find documentation to properly understand and use it.

Anyone has an idea about what flow to follow with OpenSea contracts to list for sale an NFT item created outside OpenZeppelin (ERC-721 tokens)?

I'm researching about how can I allow my users mint NFTs on Polygon network from my website (done), and to list those items in Opensea (in Polygon Network).

Opensea SDK

I was researching the Opensea SDK but it seems to work only with Ethereum, and not with Polygon.

Opensea API

I have also been checking the Opensea API but I only find methods to make orders, but not to list for sale.

Seaport

I've been reading about Seaport contract, but the official documentation does not provide information about selling process, and the contract only provides functions to buy (orders).

Anyone has an idea about what flow to follow with OpenSea contracts to list for sale an NFT item created outside OpenZeppelin (ERC-721 tokens)?