MyCryptoHeroes are tradeable on OpenSea

We’re excited to announce that we’re supporting MyCryptoHeroes on OpenSea. Heroes are currently tradeable here, with already over 14 ETH in volume exchanged. A few features of the hero marketplace on OpenSea:

Keep your heroes in your wallet while they’re on sale

You can now create an auction for a hero but keep it in your own wallet while it’s on sale. You can learn more about this feature here.

List an item without paying gas

Once you set up your OpenSea account, you can list your heroes without paying gas. When you list, you’ll just accept a MetaMask signature. When the item is successfully bought, the buyer will submit a transaction to the Ethereum blockchain.

Accept bids for your hero

Not sure what to price your hero? Other users can bid on your hero (even if it’s not on sale!), indicating what they’re willing to pay for it. You can immediately fulfill these bids, receiving wrapped Ether in exchange for your hero.

Fan of MyCryptoHeroes? Join their Discord channel. Or join us over at the OpenSea Discord channel.


How to bid on crypto collectibles using OpenSea

Have you ever seen a CryptoKitty that you really wanted, but it was just a little too expensive? Or perhaps the kitty wasn’t even on sale, but you’d simply love to get a hold of it?

OpenSea has a solution to these problems: we allow users to bid on any crypto collectible they wish to purchase, even if the item isn’t up for auction! This tutorial will walk you through exactly how this works.

Let’s take the millionth CryptoKitty, Vulcat, as an example. It’s currently listed for 100 ETH, which is a pretty high price! However, there’s an OpenSea offer for 24 ETH, which means that someone is willing to buy it for 24 ETH. The seller could immediately sell it for that amount if they’d like (but perhaps they’re waiting for a higher offer)

In this tutorial we’ll show you how you can place bids too!

How to bid on items on OpenSea

First, let’s get a tiny bit technical. When bidding on items, OpenSea uses a currency called Wrapped Ethereum (WETH). The conversion rate from ETH to WETH is always 1:1, and you can downgrade any unused WETH back to ETH. WETH is essentially the same as ETH, with some special utility. To make the conversion, just to your the bids section of your OpenSea account.

Why wrap ETH?

Why go to the trouble of using a separate currency for bids? No, it’s not because we wanted do an ICO; in fact WETH is used by a number of different projects in the community. In short, wrapped ETH allows the user to bid on many different items using the same pool of Ether. So for example, as a user with 7 WETH, I could place a 7 WETH offer on Frankie, a 7 WETH offer on Perseus, a 7 WETH offer on Alien Maker…as many CryptoKitties (or other items) as I like!

The moment my first bid gets accepted, the other offers will be instantly invalidated if I no longer have enough WETH in my account.

So let’s get bidding!

Step 1: Find the object of your desire

First things first! Let’s find a CryptoKitty on OpenSea. You can browse CryptoKitties here.

This one looks good! Plus it’s owned by a user named KookyKitty (this is extra awesome: since the user has an OpenSea profile, after you make a bid, they’ll receive an email notifying them!) To make a bid, hit “Make an offer” and enter the amount that you’d be willing to pay for it.

Step 2: Wrap your ETH

After hitting “Continue”, we’ll upgrade our ETH to WETH using the WETH station. To give us a little extra WETH with which to make more bids, we’ll upgrade .05 WETH.

Note that the first time you upgrade your ETH, you’ll need to make two transactions (one to approve OpenSea’s use of WETH). You’ll only need to do that second transaction the first time you upgrade!

Step 3: Make the bid

After confirming those transactions, we’ll make an offer! Type in the offer amount (and optionally set an expiration for your offer), and hit “Confirm Offer”

Hit “Sign” and your bid is posted!

Notice that this step doesn’t require gas! How cool is that?

Step 4: Add your email to get notified when your bid is accepted

Lastly, we recommend adding a username and e-mail to your account so we can tell you if someone accepted your bid, giving you the CryptoKitty you desired. Additionally, by entering your email, you’ll get notified any time someone bids on a crypto collectible you own!

You can do this on the account settings page.

Step 5: Make tons of bids, for free!

As mentioned, once you’ve converted some WETH, you’re off to the races! You can now place as many offers (each one up to your amount of WETH) without paying a dime (gwei). In other words, go crazy!

You can see all of the offers you’ve made, as well as any offers on your items, on the “Offers” section of your account. This can be useful if you want to cancel any offers, and to check how others are valuing your items!

We hope you enjoyed this mini tutorial on one of OpenSea’s most popular features. To stay up to date on more things OpenSea, sign up for our newsletter and join us on Discord.


Axies are now tradeable on OpenSea

We’re excited to announce that Axie Infinity Axies are now tradeable on OpenSea! Check out the selection on OpenSea here.

Why list your Axie on OpenSea?

Keep your items in your wallet while they’re on sale

You can now create an auction for an Axie but keep it in your own wallet while it’s on sale. That way your Axie can still participate in gameplay while your it’s on the market! You can learn more about this feature here.

List an item without paying gas

Once you set up your OpenSea account, you can list your Axies without paying gas. When you list, you’ll just accept a MetaMask signature. When the item is successfully bought, the buyer will submit a transaction to the Ethereum blockchain.

Accept bids for your Axie

Not sure what to price your Axie? Other users can bid on your Axie (even if it’s not on sale!), indicating what they’re willing to pay for it. You can immediately fulfill these bids, receiving wrapped Ether in exchange for your Axie.

Get more exposure

Thousands of users browse OpenSea for all sorts of game items, collectibles, digital artwork, and more. You’ll gain a ton of exposure for your Axie by listing it alongside other collectibles.

Fan of Axie Infinity? Join their Discord channel. Or join us over at the OpenSea Discord channel.


New MLB Crypto Baseball figures for sale exclusively on OpenSea

We’ve been working with the wonderful folks at Lucid Sight on supporting the secondary market for MLB Crypto Baseball figures. We’re excited to announce the exclusive sale of 27 Crypto Baseball figures on OpenSea. Check them out here.

The auctions are Dutch — meaning a figure can be bought at any point during the duration of the auction. The auctions start at 1 ETH and drop down to 0 ETH over the course of 7 days. Among the figures on sale is a very rare Dee Gordon with a gold bat and base.

Just as exciting, the secondary market for MLB Crypto Baseball items is already starting to take off, with several user-to-user sales already! As always, you can list your items on OpenSea without paying gas, and you can instantly bid on a figure if you see one you’re interested in (even if it’s not on sale).

So grab some popcorn and get geared up to play ball! As always, if you have any questions, feel free to join the OpenSea Discord channel or MLB Crypto Baseball Discord Channel.


Etheremon adventure land is tradeable on OpenSea

We’re super excited to help support the launch of Etheremon adventure mode by offering trading for adventure land and items on OpenSea.

In Etheremon adventure mode, players can own adventure sites and send their Mons to explore these sites to collect rewards. By owning Etheremon adventure land, Etheremon players become partners, stakeholders, and decision makers of the game.

The market for Adventure land is already heating up, with over 6.1 ETH of land exchanged already!

You can read more about the Etheremon adventure launch here, or start buying and selling land on OpenSea here.