Read on Twitter
Things everyone knows about OpenSea (but actually might not), a thread
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I've spent so much time on OpenSea in the past few years that I take a lot of it for granted now. I often incorrectly assume that everyone's as familiar with it as I am.
If you're new, you should pick up some useful info. If not, ask followup questions!
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If you're new, you should pick up some useful info. If not, ask followup questions!
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I'll probably update this periodically as new ideas for it occur to me. They'll likely get less obvious with time. Please add your own if you feel inclined.
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OpenSea is a decentralized exchange. We facilitate peer to peer trading. When you list an NFT for sale, it never leaves your wallet. At purchase time, the $ and the NFTs are swapped atomically (the whole deal happens or none). OpenSea never controls the $ or the NFT
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OpenSea aggregates orders from lots of other exchanges, in addition to keeping our own order books. Sometimes when you buy a CK from OpenSea, you're interacting with OpenSea's auction contracts, sometimes you're interacting with CK's.
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OpenSea, like all other NFT exchanges, uses one source of truth: the blockchain. The assets you see on OpenSea and the assets you see on Rarible are the same assets. Each exchange just offers a lens & toolkit for the state of reality as reflected on the blockchain.
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OpenSea lets you list assets for sale, no matter where you made them. Minted with @mintbase? @BuildWithCargo? @rariblecom? Doesn't matter to us, you can mint anywhere and sell on OpenSea.
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OpenSea watches and filters all of the action on the blockchain to put together a comprehensive record of movements of NFTs. You can watch as new events appear on https://opensea.io/activity . You can also filter that feed if you care about e.g. @AxieInfinity
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OpenSea has been around since the earliest days and we've gathered a lot of data on the historical performance of NFTs projects. You can explore the data here:
https://opensea.io/rankings
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https://opensea.io/rankings
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OpenSea is an NFT marketplace, but it's also an NFT forge. We have a tool for creators that lets them create NFTs without investing any gas up front https://opensea.io/blog/announcements/introducing-the-collection-manager/
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OpenSea is an NFT marketplace, but it's also an NFT explorer. Before OpenSea, there was no single web page you could visit to see all your NFTs. You had to bounce from dapp to dapp.
Now, you can just go to https://opensea.io/account and see everything you own.
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Now, you can just go to https://opensea.io/account and see everything you own.
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You can sort and filter your own account page. Different sorts yield delightful results. Yesterday I rediscovered that I own the 37th @KnownOrigin_io piece.
For OGs: https://opensea.io/account?search[sortAscending]=true&search[sortBy]=CREATED_DATE
For high rollers: https://opensea.io/account?search[sortAscending]=false&search[sortBy]=LAST_SALE_PRICE
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For OGs: https://opensea.io/account?search[sortAscending]=true&search[sortBy]=CREATED_DATE
For high rollers: https://opensea.io/account?search[sortAscending]=false&search[sortBy]=LAST_SALE_PRICE
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Your account page has a personal activity feed. It's how I usually discover that someone sent me a surprise gift. Thanks again for the squiggles @ArtOnBlockchain 
https://opensea.io/account?search[sortAscending]=false&search[sortBy]=LAST_SALE_PRICE&tab=activity
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https://opensea.io/account?search[sortAscending]=false&search[sortBy]=LAST_SALE_PRICE&tab=activity
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OpenSea shows all NFTs, even if they're not on sale. In this way, we're unlike eBay. You can make offer on assets, even if they're not on sale. Check out "Offers Received" on https://opensea.io/account?tab=bids to see if anyone's made an offer on your NFTs
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OpenSea will email you about a bunch of different NFT-related events if you'd like us to. Set up and email on https://opensea.io/account/settings and configure your settings on https://opensea.io/account/settings?tab=notifications.
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OpenSea will spare you notifications about lowball offers. Set the "Minimum Bid Threshold" threshold at the bottom of the https://opensea.io/account/settings?tab=notifications and you won't get emails about offers below that level. It defaults to 0.005 ETH
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You can use lots of different wallets on OpenSea (there's mobile-specific options, too), but @metamask_io is by far the best and you should use it if you're undecided.
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OpenSea's asset page URLs contain the two most important pieces of info about an NFT: its asset contract and its token ID.
`/assets/0x60f3680350f65beb2752788cb48abfce84a4759e/293`
The `0x60f3` bit is the address of the NFT's smart contract and 293 is the token ID
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`/assets/0x60f3680350f65beb2752788cb48abfce84a4759e/293`
The `0x60f3` bit is the address of the NFT's smart contract and 293 is the token ID
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You can take the asset contract address from the OpenSea URL and find the contract on @etherscan
opensea[dot]io/assets/0x60f3680350f65beb2752788cb48abfce84a4759e/293
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etherscan[dot]io/address/0x60f3680350f65beb2752788cb48abfce84a4759e
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opensea[dot]io/assets/0x60f3680350f65beb2752788cb48abfce84a4759e/293
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etherscan[dot]io/address/0x60f3680350f65beb2752788cb48abfce84a4759e
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You can visit the @etherscan page for the NFT's asset contract by opening the "Chain Info" panel and clicking the asset contract address.
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You can click these pills to go from https://opensea.io/assets/0x60f3680350f65beb2752788cb48abfce84a4759e/293 to https://opensea.io/assets/colorglyphs?search[stringTraits][0][name]=Origin&search[stringTraits][0][values][0]=Created (from an /asset page to a pre-filtered /assets page)
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![You can click these pills to go from https://opensea.io/assets/0x60f3680350f65beb2752788cb48abfce84a4759e/293 to https://opensea.io/assets/colorglyphs?search[stringTraits][0][name]=Origin&search[stringTraits][0][values][0]=Created (from an /asset page to a pre-filtered /assets page)continued](https://pbs.twimg.com/media/EteCiMSXEAUs19l.jpg "You can click these pills to go from https://opensea.io/assets/0x60f3680350f65beb2752788cb48abfce84a4759e/293 to https://opensea.io/assets/colorglyphs?search[stringTraits][0][name]=Origin&search[stringTraits][0][values][0]=Created (from an /asset page to a pre-filtered /assets page)continued")
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If you noticed that an NFT's image or info are out of date, you can nudge OpenSea to refresh the data by clicking the refresh button in the top right corner of the page.
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You can transfer an item you own by clicking the button that looks like a gift in the top right corner of the page. You can transfer multiple items in one transcation by selecting "Transfer" in the menu dropdown.
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You can list multiple NFTs for sale in a single listing by selecting "Sell" in the menu dropdown.
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You can visit the NFT's page on its home dapp by clicking the external link button in the top right corner of the page.
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You can report counterfeit items to us by clicking the little hamburger menu button in the top right corner and selecting "Report." Please do this, it helps us keep OpenSea safe!
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You can find the find the API URL for an NFT using the OpenSea URL
opensea[dot]io/assets/0x60f3680350f65beb2752788cb48abfce84a4759e/293
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api[dot]opensea[dot]io/asset/0x60f3680350f65beb2752788cb48abfce84a4759e/293
e.g. https://api.opensea.io/asset/0x60f3680350f65beb2752788cb48abfce84a4759e/979/
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opensea[dot]io/assets/0x60f3680350f65beb2752788cb48abfce84a4759e/293
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api[dot]opensea[dot]io/asset/0x60f3680350f65beb2752788cb48abfce84a4759e/293
e.g. https://api.opensea.io/asset/0x60f3680350f65beb2752788cb48abfce84a4759e/979/
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You can append `?force_update=true` onto an OpenSea API URL to trigger a metadata refresh. If it's not working, you can append `/validate` to see what the problem is.
e.g. https://api.opensea.io/asset/0x60f3680350f65beb2752788cb48abfce84a4759e/979/validate
(No problems here, so we see the asset's tokenURI)
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e.g. https://api.opensea.io/asset/0x60f3680350f65beb2752788cb48abfce84a4759e/979/validate
(No problems here, so we see the asset's tokenURI)
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The OpenSea API page for an asset contains tons of interesting data about the asset, its contract, its collection, its owner, and its recent orders. See https://docs.opensea.io/reference for more info on the API.
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OpenSea has tons of example code if you're thinking about coding your own NFT project. Check out https://github.com/projectOpenSea/ and https://docs.opensea.io/
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You can make offers in currencies other than what the NFT is listed in
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An NFT is a Non Fungible Token. It's just a digital thing you can own in a meaningful way.
OpenSea's own @dfinzer wrote the best resource for getting up to speed on the subject of NFTs https://opensea.io/blog/guides/non-fungible-tokens/
OpenSea's own @dfinzer wrote the best resource for getting up to speed on the subject of NFTs https://opensea.io/blog/guides/non-fungible-tokens/
On OpenSea, when you accept an offer on an NFT you own, you pay the gas. When a buyer purchases a listing you made, the buyer pays the gas.
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You can create private listings on OpenSea. For us, a private listing is visible to everyone but only fulfillable by the address you specified.
When a buyer fulfills your private listing, you pay zero fees.
No dev fee, no OpenSea fee.
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When a buyer fulfills your private listing, you pay zero fees.
No dev fee, no OpenSea fee.
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On OpenSea, NFT creators can earn fees on secondary sales
No matter where you minted ( @rariblecom, @niftygateway, @mintbase, etc.), as long as you have a contract of your own, you can earn dev fees on secondary sales
You set them in the collection manager
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No matter where you minted ( @rariblecom, @niftygateway, @mintbase, etc.), as long as you have a contract of your own, you can earn dev fees on secondary sales
You set them in the collection manager
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