How to Add Arbitrum to MetaMask (Step-by-Step Guide for Businesses)

As a consultant specialized in helping entrepreneurs tap into blockchain and web3 opportunities, I highly recommend using Arbitrum with MetaMask.

For business owners and entrepreneurs, combining Arbitrum and MetaMask provides 3 key benefits:

  1. Lower Fees – Arbitrum offers significantly lower gas fees compared to Ethereum mainnet. This reduces operating costs for companies building web3 products and services. Based on Messari data, sending a basic ETH transfer on Arbitrum is over 90% cheaper than on Ethereum.
  2. Faster Speed – Transactions on Arbitrum settle much quicker than Ethereum. For time-sensitive operations, this improved speed and efficiency is invaluable. Arbitrum can process up to 7,000 transactions per second, compared to 15 on Ethereum.
  3. Easier Adoption – Integrating a trusted, familiar wallet like MetaMask with Arbitrum makes it simpler for businesses to adopt and experiment with blockchain technology, web3 services, NFTs, and more.

Below I‘ll walk through exactly how to connect MetaMask with the Arbitrum network to gain access to these significant benefits.

Step 1: Install MetaMask

If you don‘t already have MetaMask, download and install the browser extension on your preferred web browser.

Install MetaMask

I recommend Google Chrome or Firefox for easiest integration across web3.

Once installed, create a new wallet or import your existing one by entering your secret recovery phrase. Be sure to keep this phrase private and secure – it allows restoration of your entire account.

Step 2: Get ETH

You‘ll need some Ethereum (ETH) to pay necessary gas fees. I suggest having 0.015 ETH ($25 USD).

The easiest way is to:

  1. Purchase ETH from an exchange like Coinbase.
  2. Withdraw to your MetaMask ETH public address. You can find this address inside your MetaMask wallet.

Once the ETH appears in your MetaMask wallet, you‘re ready for the next step!

Step 3: Add Arbitrum Network

Here are the specifics to add Arbitrum One mainnet to MetaMask:

  1. Open MetaMask browser extension.
  2. Click top center dropdown currently showing "Ethereum Mainnet".
  3. Scroll down and select "Custom RPC".
  4. Enter the following network details:
    • Network Name: Arbitrum One
    • RPC URL:
    • Chain ID: 42161
    • Currency Symbol: ETH
  5. Click Save.

You should now see "Arbitrum One" as an option when switching networks.

Arbitrum One on MetaMask

Step 4: Use Arbitrum Bridge

To start using DeFi, dapps, and other web3 services on Arbitrum, you‘ll need to bridge your ETH from Ethereum mainnet to Arbitrum.

The Arbitrum bridge makes this seamless.

I‘d recommend bridging 75% of your ETH balance on MetaMask to Arbitrum One. This keeps some ETH for any mainnet needs, while providing ample assets for transacting on Arbitrum.

The bridging steps are:

  1. Visit Arbitrum bridge site.
  2. Select "Ethereum" as the "From" chain and amount of ETH to bridge.
  3. Hit Transfer and confirm the transactions in MetaMask.

Within 5-10 minutes your ETH will be bridged to Arbitrum One on MetaMask!

Step 5: Using DeFi & dApps on Arbitrum

There‘s already a rich ecosystem of DeFi protocols and dApps deployed on Arbitrum for you to tap into, such as:

  • Uniswap – popular decentralized exchange
  • Balancer – automated portfolio manager
  • Curve – stablecoin swap platform
  • Hop – allows transfer between Layer 2 chains

Using these services on Arbitrum provides entrepreneurs with two major benefits compared to Ethereum mainnet:

  1. Significantly lower fees – Gas on Arbitrum can be up to 90% cheaper than Ethereum mainnet. This results in major cost reductions.
  2. Faster speeds – Settlement of transactions on Arbitrum happens is seconds, rather than minutes on Ethereum.

By leveraging Arbitrum and MetaMask, companies can start embedding DeFi advantages into their business models with minimal friction.

The opportunities to integrate web3 innovations through Arbitrum keeps expanding rapidly – I‘m excited to see what entrepreneurs will build!

Hope you found this guide useful. Feel free to reach out if you have any other questions!