Here is how Connect MetaMask Wallet to Arbitrum One Mainnet in 5 simple steps
Step 1. Log into your Metamask wallet and click on the menu button (three lines in the top left of your screen on mobile).
Step 2. Go to Settings
Step 3. Click on Networks
Step 4. Now click on the ‘Add Network’ button on the bottom
Step 5. Fill in the following information and save:
- Network Name: Arbitrum One
- New RPC URL: https://arb1.arbitrum.io/rpc
- Chain ID: 42161
- Currency Symbol: ETH
- Block Explorer URL: https://arbiscan.io

Congratulations! You now have Arbitrum One on your MetaMask wallet and can start using Arbitrum One with MetaMask.

Note:
Be sure to add enough $ETH to your wallet on Arbitrum network to handle gas fees.
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