How to Add Arbitrum to MetaMask
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Summary: Arbitrum, a Layer 2 scaling solution for Ethereum, can be added to MetaMask through ChainList (Chain ID 42161) or manual setup.
Built for speed and low fees, it supports fast transactions, full EVM compatibility, and efficient smart contract deployment, making it ideal for DeFi, gaming, and Web3 applications.
ChainList Overview
ChainList is the most trusted aggregator of EVM-based Layer 1 and 2 networks. It allows users to instantly connect their MetaMask to verified Chain and Network IDs, ensuring a safe connection.
Supported Networks
100+ Layer 1 and Layer 2 chains
Development Team
Built by the Defillama team
Compatible Wallets
MetaMask only
Can I Add Arbitrum to MetaMask?
Yes, Arbitrum One can be added to MetaMask as a custom network. As a Layer 2 scaling solution, it lowers transaction costs while maintaining Ethereum’s security and EVM compatibility.
To connect, enter the correct RPC details and network settings. Once added, you can interact with dApps, trade assets, and use DeFi protocols with lower fees and faster transactions than Ethereum mainnet.
How to Add Arbitrum to MetaMask
To connect Arbitrum to MetaMask, you need to manually input the network details or use ChainList, a trusted EVM network aggregator that simplifies the process.
Quick Guide to Adding Arbitrum via ChainList:
- Open ChainList – Visit ChainList and connect your MetaMask wallet.
- Search for Arbitrum – Type "Arbitrum One" or "Arbitrum Nova" in the search bar.
- Select the Network – Click "Add to MetaMask" on the correct network.
- Approve and Confirm – Follow the MetaMask prompts to complete the setup.
Arbitrum RPC and Chain ID
To manually add Arbitrum to MetaMask without using third-party tools like ChainList, enter the following network details:
- Network Name: Arbitrum LlamaNodes
- RPC URL: https://arbitrum.llamarpc.com
- Chain ID: 42161
- Currency Symbol: ETH
- Block Explorer: https://arbiscan.io
For the most up-to-date network details, always check Arbitrum’s official documentation.
About Arbitrum
Arbitrum is a Layer 2 scaling solution that leverages optimistic rollups to enhance Ethereum’s transaction throughput and lower gas fees while maintaining its security. It processes transactions off-chain, submitting compressed data to Ethereum with fraud-proof validation.
Arbitrum One is its primary network, designed for general-purpose Ethereum scaling, offering full EVM compatibility and decentralized dispute resolution through interactive fraud proofs, ensuring trustless and efficient smart contract execution.
Final Thoughts
Connecting Arbitrum to MetaMask is quick and lets you use Ethereum with lower fees and faster transactions. You can add it manually or through ChainList for convenience.
If an RPC is not working, check official sources for the latest details. There are usually multiple RPC providers available.
Written by
Antony Bianco
Head of Research
Antony Bianco, co-founder of Datawallet, is a DeFi expert and active member of the Ethereum community who assist in zero-knowledge proof research for layer 2's. With a Master’s in Computer Science, he has made significant contributions to the crypto ecosystem, working with various DAOs on-chain.
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