How do I connect MetaMask to the Arbitrum network?

Connecting MetaMask to Arbitrum lets users access faster transactions and lower fees on Ethereum-based dApps like GMX and Camelot by adding the Arbitrum network manually.

Jun 12, 2025 at 09:00 pm

What is MetaMask and Why Connect It to Arbitrum?

MetaMask is a popular cryptocurrency wallet that allows users to interact with the Ethereum blockchain and other Ethereum-compatible networks. Connecting MetaMask to Arbitrum enables users to access decentralized applications (dApps) built on the Arbitrum Layer 2 scaling solution, which offers faster transaction speeds and significantly lower gas fees compared to the Ethereum mainnet.

Arbitrum is one of the leading Layer 2 protocols designed to enhance scalability and reduce congestion on the Ethereum network. To fully utilize Arbitrum-based dApps like GMX, Camelot, or various DeFi protocols, you need to configure your MetaMask wallet to recognize the Arbitrum network.

How Do I Add Arbitrum to My MetaMask Wallet?

To connect MetaMask to Arbitrum, you must manually add the Arbitrum network to your wallet settings. This process involves entering specific network parameters such as the RPC URL, chain ID, currency symbol, block explorer URL, and network name.

Here’s how to do it step by step:

• Open your MetaMask extension or mobile app.

• Navigate to the network selection dropdown at the top of the interface.

• Click on "Add Network."

• Choose "Add a network manually" if using the latest version of MetaMask.

• Fill in the required details for Arbitrum One Mainnet:

  • Network Name: Arbitrum One
  • New RPC URL: https://arb1.arbitrum.io/rpc
  • Chain ID: 42161
  • Currency Symbol: ETH
  • Block Explorer URL: https://arbiscan.com/

Once all fields are correctly filled, click "Save." MetaMask will now switch to the Arbitrum network automatically.

What Are the Common Issues When Adding Arbitrum to MetaMask?

Some users may encounter errors when adding Arbitrum to their MetaMask wallets. The most common issues include incorrect RPC URLs, wrong chain IDs, or unstable internet connections.

One frequent issue is an invalid RPC endpoint. If you receive an error stating "RPC endpoint not found," double-check the RPC URL you entered. Ensure there are no extra spaces or typos. Also, confirm that the URL is https://arb1.arbitrum.io/rpc.

Another common problem is insufficient balance in the Arbitrum network. Even if you have ETH in your Ethereum wallet, those funds won’t appear on Arbitrum unless you bridge them. Use a trusted bridge service like the official Arbitrum Bridge or third-party bridges like Hop Finance or Across to transfer assets from Ethereum to Arbitrum.

How Do I Switch Between Networks in MetaMask After Adding Arbitrum?

After successfully adding Arbitrum to your MetaMask wallet, switching between networks becomes straightforward. You can toggle between Ethereum, Binance Smart Chain, Polygon, and Arbitrum directly from the network selector dropdown menu.

To switch to Arbitrum:

• Click on the network name displayed at the top of the MetaMask interface.
• From the list of available networks, select “Arbitrum One.”
• Your wallet will now display balances and activity specific to the Arbitrum network.

If you want to return to Ethereum or another network, simply repeat the steps and choose the desired network from the list. Always ensure you're on the correct network before sending transactions or interacting with dApps.

How Can I Confirm That MetaMask Is Properly Connected to Arbitrum?

After completing the setup, it's crucial to verify that MetaMask is correctly connected to the Arbitrum network. One way to confirm this is by checking your wallet address on the Arbitrum block explorer.

Follow these verification steps:

• Copy your MetaMask wallet address.
• Go to https://arbiscan.com/.
• Paste your wallet address into the search bar and press enter.
• If you've previously bridged funds or interacted with Arbitrum, you’ll see transaction records associated with your address.

If your wallet shows a zero balance and no transaction history, it means you haven’t bridged any assets yet. In that case, proceed to use a cross-chain bridge to move assets from Ethereum to Arbitrum.

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Frequently Asked Questions

Q: Can I use the same wallet address on Arbitrum as on Ethereum?

Yes, your wallet address remains the same across both networks. However, assets held on Ethereum are not automatically available on Arbitrum. You need to bridge them using a compatible cross-chain bridge.

Q: Is it safe to connect MetaMask to Arbitrum?

Yes, connecting MetaMask to Arbitrum is safe as long as you’re using the official RPC URL and verified bridges. Always ensure you’re interacting with trusted platforms to avoid scams or phishing attempts.

Q: Do I need ETH on Arbitrum to pay for gas fees?

Yes, just like on Ethereum, you need ETH (native to Arbitrum) to pay for gas fees when executing transactions or interacting with dApps on the Arbitrum network.

Q: Can I use MetaMask Mobile to connect to Arbitrum?

Yes, the MetaMask mobile app supports adding custom networks, including Arbitrum. Follow the same steps as on the desktop browser extension to configure the network.