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How to Add Base to MetaMask (Mainnet & Testnet)

Datawallet Team
Written by
Emily Shin
Last updated
April 16, 2025
This date marks a full audit, not a minor edit. Our editing team reviews every claim, figure, and platform detail in line with our editorial guidelines before republishing.
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Summary: Base is an Ethereum Layer 2 network built for DeFi, NFTs, and perpetual trading. To add Base to MetaMask, use ChainList (Chain ID 8453), a trusted source for verified RPC details, or configure it manually.

Developers testing apps before mainnet deployment can also use Base Sepolia Testnet (Chain ID 84532) to safely experiment without real funds.

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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
We may receive a commission when you make a transaction through our links, at no extra cost to you.

Can I Add Base to MetaMask?

Yes, Base can easily be added to MetaMask. Base is an Ethereum Layer 2 blockchain built using Optimism's OP Stack, offering full EVM equivalence. 

After connecting, you'll be able to directly access Base-native dapps like Aerodrome for DeFi and SynFutures for perpetual trading. The integration gives you complete access to Base’s growing ecosystem, alongside some of the lowest fees among Layer 2 networks.

How to Add Base to MetaMask

The easiest way to safely add Base to your MetaMask wallet is through a reliable network aggregator like ChainList, ensuring you connect with the correct chain ID and a verified RPC endpoint.

Quick steps using ChainList:

  1. Visit ChainList: Go to ChainList.org and connect your MetaMask wallet.
  2. Search Base: Type "Base" in the search box.
  3. Add the Network: Click "Add to MetaMask" next to Base Mainnet.
  4. Approve Connection: Confirm the connection in the MetaMask prompt, and you'll be ready to use Base immediately.
Add Base to MetaMask

Base Mainnet RPC and Chain ID

If you prefer manually connecting Base Mainnet to MetaMask instead of using ChainList, enter these official network settings:

  • Network Name: Base LlamaNodes
  • RPC URL: https://base.llamarpc.com
  • Chain ID: 8453
  • Currency Symbol: ETH
  • Block Explorer: https://basescan.org

Always verify network details with the official Base documentation to ensure accuracy.

Base Sepolia (Testnet) RPC and Chain ID

For developers looking to deploy apps on a test network before mainnet launch, or users wanting early access to applications still in development, manually connect Base Sepolia Testnet to MetaMask using these official settings:

To use Base Sepolia, you will need to get testnet ETH on Base, which is used as gas for transactions on the network.

What is Base?

Base is an Ethereum Layer-2 network developed by Coinbase using Optimism’s OP Stack. It employs optimistic rollups, batching transactions off-chain and posting them periodically to ETH mainnet, greatly reducing costs and boosting speed while maintaining Ethereum-level security. 

Fully EVM-equivalent, Base allows seamless deployment of Ethereum-compatible dapps across DeFi, NFTs, perpetuals, and gaming, with integrated Coinbase onboarding for smoother user adoption.

What is Base?

Final Thoughts

Connecting Base to MetaMask opens easy, low-cost access to Coinbase’s Layer-2 Ethereum ecosystem. Use Base Mainnet for live transactions involving real assets, or Base Sepolia Testnet to safely experiment with apps in development using test ETH. 

Be sure to double-check network details against official Base resources for accuracy. 

Emily Shin

Written by 
Emily Shin

Research

Emily writes about Web3 with a focus on decentralized finance, NFTs, GameFi, and the wider crypto culture. She has a knack for breaking down complex, cutting-edge technologies into clear explanations that show readers why they matter.

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How to Add Base to MetaMask (Mainnet & Testnet)

Table of Contents

  • Can I Add Base to MetaMask?
  • How to Add Base to MetaMask
  • Base Mainnet RPC and Chain ID
  • Base Sepolia (Testnet) RPC and Chain ID
  • What is Base?
  • Final Thoughts
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