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How to buy Polygon NFTs on OpenSea

Polygon Team
Polygon Team
Jul 21, 2022

With over 1.6 million active users, OpenSea is currently the largest marketplace to buy, sell, and trade non-fungible tokens (NFTs). 

Originally, OpenSea’s platform was based solely on Ethereum, but they have since implemented Polygon PoS, to solve various issues that users face on the blockchain. 

Making Ethereum even better

Ethereum is still the place to be for those looking to launch NFTs or build decentralized platforms. While ETH is still a wonderful choice for devs, it does come with some drawbacks.

It’s rather common for ETH users to encounter slow transaction times, high gas fees and a good deal of network congestion considering the chain is so widely used. 

With Polygon’s sidechain technology, transaction times are faster and gas fees are nearly non-existent. Polygon can be implemented into all ETH-based applications and OpenSea has even implemented it. 

Thanks to Polygon, users can experience a more seamless purchasing process, within this already widely popular marketplace. 

Ready to get started? 

Follow the guide below and you will be buying NFTs on Polygon in no time. 

Your wallet will thank you…Cheers Party GIF - Cheers Party Thanks GIFs


Step 1: Bridging ETH to Polygon

If you wish to purchase an NFT on OS(OpenSea) using Polygon, you’ll first need to bridge ETH over to the Polygon network. 

Thankfully, you can bridge your ETH right inside of OS!

  • To do this, pull up your connected wallet of choice, by clicking the wallet icon in the upper right corner of the OpenSea landing page. 
  • Once your wallet pops up, look below your blue “Add Funds” button at your available ETH funds. Directly to the right of your balance, are three dots, called “More”. Click there and select “Bridge to Polygon” from the dropdown menu. 
  • The following popup should appear.
  • Enter the amount of ETH (Ethereum) you would like to bridge and click “Convert Tokens” when you are ready. 
  • Sign the transaction on your crypto wallet, and grab a cup of coffee while you wait for the funds to transfer – it could take just a few minutes. 


After completing the conversion, you will see your newly converted ETH (Polygon) inside your wallet connected to OpenSea. 

It should be noted that you will need to pay a gas fee in order to bridge the funds, but thankfully you will only need to do this once. 

Your freshly converted ETH funds will remain on Polygon, unless you bridge them back. For this reason, it might be wise to move a larger sum of money over, to avoid having to bridge funds every time you wish to buy another NFT.

Step 2: Finding and buying an NFT on OpenSea with Polygon

Now that your funds are available, it’s time to hit the marketplace.

How to find Polygon NFTs

There are two easy ways to find Polygon NFTs.

  1. Filter

When browsing for NFTs, bring your attention to the side panel that lists filtering options. Below the “Price” and “Collections” filter tabs, you will see an option called “Chains”. Click the “Chains” option and select “Polygon” from the dropdown. 

Now your browser will only populate Polygon compatible NFTs.


  1. Look for the Purple Hexagon

Other than using the filter, you can also look out for the purple hexagon.

All NFTs available for purchase on Polygon will have a purple hexagon (the ETH           symbol) in place of the typical gray/black ETH symbol, or magenta WETH (wrapped ETH).

See the picture below for reference. 



Buying is similar to making a purchase with ETH, only that you’ll be doing so with Polygon-based ETH.

  • Click on the NFT you would like to purchase and select the “Buy now” button. 


  • If it is your first time purchasing a Polygon NFT, you will be asked to unlock Polygon trading on your wallet. You will only have to complete this process once.
  • To complete your signature you will need to switch your wallet network to Polygon. 

Also, make sure to have some MATIC tokens in your wallet to cover the small gas fee.

Congrats on your new Crypto Unicorn 😉 

Step 3: Using Polygon to sell NFTs on OpenSea

If you would like to sell your NFTs, the process is quite similar to how you’d buy an NFT using ETH. When listing your NFT you will just need to switch your wallet to the Polygon Network, in order to sign off on the transaction. 

Also, please remember that if your NFT was previously bought on Polygon, it will need to also be SOLD on Polygon.

Make sure you have MATIC tokens in your wallet to cover the transaction fees (just like when you bought).

Polygon’s Growth on OpenSea

According to Dune Analytics, Polygon’s total users over time on OpenSea, have increased from about 2,000 users in July of 2021, (when the service first became available) to over 1.2 million users in April of 2022.

OpenSea users are realizing the massive value add that Polygon provides, and as mass adoption of NFTs spreads, Polygon’s scaling solutions will only become increasingly necessary for sustainability. 

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