Things everyone knows about OpenSea (but actually might not), a thread

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I& #39;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& #39;s as familiar with it as I am.

If you& #39;re new, you should pick up some useful info. If not, ask followup questions!

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I& #39;ll probably update this periodically as new ideas for it occur to me. They& #39;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& #39;re interacting with OpenSea& #39;s auction contracts, sometimes you& #39;re interacting with CK& #39;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& #39;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 .">https://opensea.io/activity&... You can also filter that feed if you care about e.g. @AxieInfinity

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OpenSea: Buy, sell, and explore digital assets

https://opensea.io/activity
OpenSea has been around since the earliest days and we& #39;ve gathered a lot of data on the historical performance of NFTs projects. You can explore the data here:

https://opensea.io/rankings 

continued">https://opensea.io/rankings&... https://abs.twimg.com/emoji/v2/... draggable="false" alt="👇" title="Rückhand Zeigefinger nach unten" aria-label="Emoji: Rückhand Zeigefinger nach unten">
Top NFTs by Market Cap

A peer-to-peer marketplace for rare digital items and crypto collectibles. Buy, sell, auction, and discover CryptoKitties, Decentraland, Gods Unchained cards, blockchain game items, and more. Over...

https://opensea.io/rankings
OpenSea is an NFT marketplace, but it& #39;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/

continued">https://opensea.io/blog/anno... https://abs.twimg.com/emoji/v2/... draggable="false" alt="👇" title="Rückhand Zeigefinger nach unten" aria-label="Emoji: Rückhand Zeigefinger nach unten">
Create NFTs for Free on OpenSea - OpenSea blog

The first way to create & sell NFTs for free. We have a new technique for creating non-fungible tokens (NFTs) on OpenSea, where creators don’t have to pay gas. It’s the first truly-free NFT maker,...

https://opensea.io/blog/announcements/introducing-the-collection-manager/
OpenSea is an NFT marketplace, but it& #39;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 ">https://opensea.io/account&q... and see everything you own.

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My Account | OpenSea

A peer-to-peer marketplace for rare digital items and crypto collectibles. Buy, sell, auction, and discover CryptoKitties, Decentraland, Gods Unchained cards, blockchain game items, and more. Over...

https://opensea.io/account
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">https://opensea.io/account... high rollers: https://opensea.io/account?search[sortAscending]=false&search[sortBy]=LAST_SALE_PRICE

continued">https://opensea.io/account... https://abs.twimg.com/emoji/v2/... draggable="false" alt="👇" title="Rückhand Zeigefinger nach unten" aria-label="Emoji: Rückhand Zeigefinger nach unten">
My Account | OpenSea

A peer-to-peer marketplace for rare digital items and crypto collectibles. Buy, sell, auction, and discover CryptoKitties, Decentraland, Gods Unchained cards, blockchain game items, and more. Over...

https://opensea.io/account?search[sortAscending]=true&search[sortBy]=CREATED_DATE
Your account page has a personal activity feed. It& #39;s how I usually discover that someone sent me a surprise gift. Thanks again for the squiggles @ArtOnBlockchain https://abs.twimg.com/emoji/v2/... draggable="false" alt="🥰" title="Smiling face with 3 hearts" aria-label="Emoji: Smiling face with 3 hearts">

https://opensea.io/account?search[sortAscending]=false&search[sortBy]=LAST_SALE_PRICE&tab=activity

continued">https://opensea.io/account... https://abs.twimg.com/emoji/v2/... draggable="false" alt="👇" title="Rückhand Zeigefinger nach unten" aria-label="Emoji: Rückhand Zeigefinger nach unten">
My Account | OpenSea

A peer-to-peer marketplace for rare digital items and crypto collectibles. Buy, sell, auction, and discover CryptoKitties, Decentraland, Gods Unchained cards, blockchain game items, and more. Over...

https://opensea.io/account?search[sortAscending]=false&search[sortBy]=LAST_SALE_PRICE&tab=activity
OpenSea shows all NFTs, even if they& #39;re not on sale. In this way, we& #39;re unlike eBay. You can make offer on assets, even if they& #39;re not on sale. Check out "Offers Received" on https://opensea.io/account?tab=bids">https://opensea.io/account... to see if anyone& #39;s made an offer on your NFTs

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My Account | OpenSea

A peer-to-peer marketplace for rare digital items and crypto collectibles. Buy, sell, auction, and discover CryptoKitties, Decentraland, Gods Unchained cards, blockchain game items, and more. Over...

https://opensea.io/account?tab=bids
OpenSea will email you about a bunch of different NFT-related events if you& #39;d like us to. Set up and email on https://opensea.io/account/settings">https://opensea.io/account/s... and configure your settings on https://opensea.io/account/settings?tab=notifications.

continued">https://opensea.io/account/s... https://abs.twimg.com/emoji/v2/... draggable="false" alt="👇" title="Rückhand Zeigefinger nach unten" aria-label="Emoji: Rückhand Zeigefinger nach unten">
Notification Settings | OpenSea

A peer-to-peer marketplace for rare digital items and crypto collectibles. Buy, sell, auction, and discover CryptoKitties, Decentraland, Gods Unchained cards, blockchain game items, and more. Over...

https://opensea.io/account/settings
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">https://opensea.io/account/s... and you won& #39;t get emails about offers below that level. It defaults to 0.005 ETH

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Notification Settings | OpenSea

A peer-to-peer marketplace for rare digital items and crypto collectibles. Buy, sell, auction, and discover CryptoKitties, Decentraland, Gods Unchained cards, blockchain game items, and more. Over...

https://opensea.io/account/settings?tab=notifications
You can use lots of different wallets on OpenSea (there& #39;s mobile-specific options, too), but @metamask_io is by far the best and you should use it if you& #39;re undecided.

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OpenSea& #39;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& #39;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

-->

etherscan[dot]io/address/0x60f3680350f65beb2752788cb48abfce84a4759e

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You can visit the @etherscan page for the NFT& #39;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">https://opensea.io/assets/0x... to https://opensea.io/assets/colorglyphs?search[stringTraits][0][name]=Origin&search[stringTraits][0][values][0]=Created">https://opensea.io/assets/co... (from an /asset page to a pre-filtered /assets page)

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If you noticed that an NFT& #39;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 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.continued https://abs.twimg.com/emoji/v2/... draggable=" title="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.continued https://abs.twimg.com/emoji/v2/... draggable="false" alt="👇" title="Rückhand Zeigefinger nach unten" aria-label="Emoji: Rückhand Zeigefinger nach unten">">
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.continued https://abs.twimg.com/emoji/v2/... draggable=" title="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.continued https://abs.twimg.com/emoji/v2/... draggable="false" alt="👇" title="Rückhand Zeigefinger nach unten" aria-label="Emoji: Rückhand Zeigefinger nach unten">">
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& #39;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

-->

api[dot]opensea[dot]io/asset/0x60f3680350f65beb2752788cb48abfce84a4759e/293

e.g. https://api.opensea.io/asset/0x60f3680350f65beb2752788cb48abfce84a4759e/979/

continued">https://api.opensea.io/asset/0x6... https://abs.twimg.com/emoji/v2/... draggable="false" alt="👇" title="Rückhand Zeigefinger nach unten" aria-label="Emoji: Rückhand Zeigefinger nach unten">
You can append `?force_update=true` onto an OpenSea API URL to trigger a metadata refresh. If it& #39;s not working, you can append `/validate` to see what the problem is.

e.g. https://api.opensea.io/asset/0x60f3680350f65beb2752788cb48abfce84a4759e/979/validate">https://api.opensea.io/asset/0x6...

(No problems here, so we see the asset& #39;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 ">https://docs.opensea.io/reference... for more info on the API.

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API Overview

https://docs.opensea.io/reference
OpenSea has tons of example code if you& #39;re thinking about coding your own NFT project. Check out https://github.com/projectOpenSea/ ">https://github.com/projectOp... and https://docs.opensea.io/ 

continued">https://docs.opensea.io/">... someday https://abs.twimg.com/emoji/v2/... draggable="false" alt="☺️" title="Lächelndes Gesicht" aria-label="Emoji: Lächelndes Gesicht">
OpenSea

https://github.com/projectOpenSea/
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& #39;s just a digital thing you can own in a meaningful way.

OpenSea& #39;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/">https://opensea.io/blog/guid...
The Non-Fungible Token Bible: Everything you need to know about NFTs - OpenSea blog

This post provides an in-depth overview of non-fungible tokens: from the history of the non-fungible token, the technical anatomy of an ERC721, to the current state of the market, to the exciting...

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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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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https://twitter.com/dan_OpenSea/status/1358841337144090636

continued">https://twitter.com/dan_OpenS... someday https://abs.twimg.com/emoji/v2/... draggable="false" alt="😊" title="Lächelndes Gesicht mit lächelnden Augen" aria-label="Emoji: Lächelndes Gesicht mit lächelnden Augen">
You can follow @dan_OpenSea.
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