How to Add Arbitrum to MetaMask

Quick answer: To add Arbitrum to MetaMask, open your wallet, access the network settings, enter Arbitrum network details, and save the configuration.

Before you start

• Install the latest version of MetaMask.
• Have some ETH for gas fees on Ethereum mainnet.
• Ensure you have a stable internet connection.
• Backup your current MetaMask seed phrase.
• Familiarize yourself with basic MetaMask operations.

How to Add Arbitrum to MetaMask: step by step

1. Open MetaMask

Launch the MetaMask application or browser extension. Enter your password if prompted to unlock your wallet.

2. Access Network Settings

In the MetaMask interface, click on the current network dropdown menu at the top. This is usually labeled as ‘Ethereum Mainnet’ or another network.

3. Add Network Manually

Select ‘Add Network’ from the dropdown menu. This will open the network configuration page where you can enter custom network details.

4. Enter Arbitrum Network Details

Fill in the following details for the Arbitrum network: Network Name: Arbitrum One, New RPC URL: https://arb1.arbitrum.io/rpc, Chain ID: 42161, Currency Symbol: ETH, Block Explorer URL: https://arbiscan.io. Ensure accuracy as incorrect details can cause connection issues.

5. Save the Network Configuration

After entering the details, click the ‘Save’ button. MetaMask will validate the information and add Arbitrum to your network list if entered correctly.

6. Switch to Arbitrum Network

Once saved, go back to the network dropdown menu and select ‘Arbitrum One’ from the list. Your MetaMask will now connect to the Arbitrum network.

7. Fund Your Arbitrum Wallet

To use Arbitrum, you need to bridge ETH or other assets from Ethereum mainnet to Arbitrum. Use a bridge service like Arbitrum Bridge, connect your MetaMask, and follow the bridging instructions.

8. Verify the Connection

After bridging, check your Arbitrum wallet balance in MetaMask to ensure the funds have been transferred successfully. You can also verify transactions on Arbiscan.

9. Test with a Small Transaction

Before making larger transactions, perform a small test transaction to confirm that everything is working correctly and to familiarize yourself with the process.

Fees and how long it takes

Fees on Arbitrum are generally lower than on Ethereum mainnet, but they can vary based on network congestion and the complexity of the transaction. Typical fees range from a few cents to a couple of dollars.

The time it takes to add Arbitrum to MetaMask is minimal, but bridging assets can take from a few minutes to an hour depending on network traffic and the bridge service used.

Tips to avoid mistakes

• Always double-check network details before saving.
• Use a bridge service with a good reputation to avoid scams.
• Keep your MetaMask updated to the latest version for security.
• Bookmark the Arbitrum network URL for easy access.
• Monitor gas prices on Arbitrum to optimize transaction costs.

Stay safe

• Never share your seed phrase with anyone.
• Ensure you are on the correct network before making transactions.
• Be cautious of phishing sites mimicking Arbitrum or MetaMask.
• Use strong, unique passwords for your MetaMask account.
• Regularly review your transaction history for any unauthorized activity.

If something goes wrong

Cannot find Arbitrum in network list — Make sure you have entered the network details correctly and saved the configuration.

Insufficient funds for gas fees — Transfer some ETH to your MetaMask wallet to cover the gas fees for bridging.

Bridging takes too long — Be patient and check the bridge service status for any network issues or delays.

Transaction fails on Arbitrum — Verify the network connection and try again with a higher gas fee if necessary.

Doing this as part of trading, income, or a disposal? See how it may be taxed in Tax by country and the taxable-events section — information, not advice.