How to Purchase Polygon NFTs on OpenSea
Tags: nft, opensea, polygon, ethereum
Published: 2021-10-16 03:28:10

<div style="width: 100%; display: flex; flex-direction: row; align-items: center; justify-content: center;">
<img
    src="https://blog.hdks.org/images/How-to-Purchase-Polygon-NFTs-on-OpenSea/title_opensea.png"
    alt="opensea"
    style="flex-grow: 1;"
/>
<img
    src="https://blog.hdks.org/images/How-to-Purchase-Polygon-NFTs-on-OpenSea/title_polygon.png"
    alt="polygon"
    style="flex-grow: 1;"
/>
</div>

Are you newbie on OpenSea or Polygon? And you don't know how to get ETH (Polygon) for buying NFTs on OpenSea?  

If so, relax. I also didn't know that until 2 months ago. This article may help you.  

## 1. Set Up MetaMask

First, install **<a href="https://metamask.io/" target="_blank" rel="noopener noreferrer">MetaMask</a>** as a browser extension on any compatible browser.  
Then you should see the fox icon on the top right on your browser.

![screenshot_1](https://blog.hdks.org/images/How-to-Purchase-Polygon-NFTs-on-OpenSea/screenshot_1.png) 

Click it and  do the following steps:  

1. Click on the "Create a Wallet" button.
2. Create a new password.
3. View and save your secret pass phrase. It is used to recovery your account.  

For more details, see [Polygon Docs](https://docs.polygon.technology/docs/develop/metamask/hello).

## 2. Configure Matic Network on MetaMask

For getting ETH (Polygon) and purchasing NFTs, you need to configure **Matic Network** on your **MetaMask**.  

1. Click MetaMask icon on your browser.
2. Click the network drop-down menu. Probably the default network is "Ethereum Mainnet".
3. On the drop-down menu, click **"Custom RPC"** and set the correct value in forms as below:
![screenshot_2](https://blog.hdks.org/images/How-to-Purchase-Polygon-NFTs-on-OpenSea/screenshot_2.png) 
4. Click "Save" button.

For more details, see [Polygon Docs](https://docs.polygon.technology/docs/develop/metamask/config-polygon-on-metamask).  

## 3. Get ETH (Ethereum) From Somewhere

Get ETH (Ethereum) from somewhere e.g. Binance, Coinbase, bitFlyer,...  

For more details, see [Ethereum Page](https://ethereum.org/en/get-eth/).  

## 4. ETH (Etherum) -> ETH (Polygon) on OpenSea

OK, you're ready for convert your ETH (Ethereum) to ETH (Polygon)!  

Go to [OpenSea](https://opensea.io/) and login.  

Please check the **Ethereum Mainnet** is selected on your **MetaMask** at this point.  
![screenshot_4](https://blog.hdks.org/images/How-to-Purchase-Polygon-NFTs-on-OpenSea/screenshot_4.png)  

Then, click the **Wallet** icon on the top right on **OpenSea**.  
![screenshot_3](https://blog.hdks.org/images/How-to-Purchase-Polygon-NFTs-on-OpenSea/screenshot_3.png) 

Click the **"More"** button on the right of **"ETH (Ethereum)"**
![screenshot_5](https://blog.hdks.org/images/How-to-Purchase-Polygon-NFTs-on-OpenSea/screenshot_5.png) 

Click **"Bridge to Polygon"**.  
The popup opened, so enter the **ETH (Ethereum)** value that you want to bridge to **Polygon**.
![screenshot_6](https://blog.hdks.org/images/How-to-Purchase-Polygon-NFTs-on-OpenSea/screenshot_6.png)  

Click "Convert tokens".  
The gas fee is high, so let's wait for the moment it will be cheaper while taking a cup of coffee☕  

When it's done, you should see that your balance of **ETH(Polygon)** has increased on your wallet of OpenSea.  

## 5. Purchase NFTs on OpenSea

Now you can purchase NFTs on OpenSea with **Polygon**.  

For how to purchase, plese see the [OpenSea Doc](https://support.opensea.io/hc/en-us/articles/1500012889322-How-do-I-purchase-NFTs-on-Polygon-)

## 6. Conclusion

I hope it helps you.  

By the way, **[my Polygon NFT project](https://opensea.io/collection/polyangels)** is live on **OpenSea** now. 
Plese check out too!