A Guide to Adding Ethereum-Compatible Networks to MetaMask

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MetaMask stands as one of the most widely used non-custodial cryptocurrency wallets, enabling users to manage digital assets and interact with decentralized applications (dapps) seamlessly. While it natively supports the Ethereum blockchain, many users seek to expand their experience by integrating Ethereum-compatible networks. This guide provides a clear, step-by-step approach to configuring these networks within your MetaMask wallet.

Understanding MetaMask and Multi-Network Support

MetaMask operates as both a browser extension and a mobile application, offering a secure gateway to the world of Web3. Its primary function is to facilitate transactions and smart contract interactions on the Ethereum mainnet. However, the growing ecosystem of Layer 2 scaling solutions and alternative Ethereum Virtual Machine (EVM) chains means that supporting multiple networks is essential for a comprehensive DeFi and dapp experience.

Adding these compatible networks allows you to:

Step-by-Step: How to Add a New Network

The process for adding a custom network is straightforward and similar across both the browser extension and mobile app. Follow these steps carefully.

  1. Open Settings: Click on the account icon in the top-right corner of your MetaMask window and select "Settings" from the dropdown menu.
  2. Navigate to Networks: Within the Settings menu, find and click on the "Networks" option.
  3. Add a Network: Click the "Add Network" button. You will be presented with a form to fill out.

  4. Enter Network Details: Precisely input the required information for the network you wish to add. This includes:

    • Network Name: The common name of the blockchain (e.g., Polygon Mainnet).
    • New RPC URL: The endpoint URL provided by the network for communication.
    • Chain ID: A unique identifier for the specific network.
    • Currency Symbol (optional): The native token's ticker symbol (e.g., MATIC, BNB).
    • Block Explorer URL (optional): The URL for a block explorer to view your transactions.
  5. Save and Switch: After double-checking all details, click "Save." The new network will now appear in your network list, and MetaMask will automatically switch to it.

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Accessing Test Networks

By default, MetaMask only displays the Ethereum Mainnet. If you are a developer or tester needing access to Ethereum testnets like Goerli or Sepolia, you must enable them manually.

  1. Go to Settings > Advanced.
  2. Scroll down and toggle on the "Show test networks" option.
  3. These test networks will now be available in your main network dropdown list.

Configuration Parameters for Popular EVM Networks

To simplify the setup process, here is a curated list of the required parameters for some of the most popular Ethereum-compatible networks. Always verify these details on the official project websites before adding them, as RPC URLs can occasionally change.

Polygon (MATIC)

Binance Smart Chain (BNB)

Arbitrum One (ETH)

Optimism (ETH)

Avalanche C-Chain (AVAX)

Fantom Opera (FTM)

Best Practices for Managing Multiple Networks

Successfully adding networks is just the first step. Proper management is key to security and efficiency.

👉 Get the latest on network configurations

Frequently Asked Questions

Why can't I see my tokens after adding a new network?
Adding a network connects your wallet to the blockchain, but custom tokens must often be imported manually. Find the token's contract address on the block explorer, go to your assets list in MetaMask, click "Import tokens," and paste the address.

Is it safe to add custom networks to MetaMask?
Yes, the act of adding a network is safe as long as you use the correct, official parameters. The risk lies in interacting with malicious dapps on any network. Always exercise caution and do your own research.

What is the difference between an RPC URL and a Chain ID?
The RPC URL is the gateway your wallet uses to communicate with the blockchain network. The Chain ID is a unique number that ensures your transactions are broadcast to the correct network and prevents replay attacks.

Can I use the same wallet address on different networks?
Yes, your public Ethereum address is universal across all EVM-compatible networks. However, each network has its own native currency and transaction history. You must fund your address with the native gas token for each network you wish to use.

What should I do if a transaction is stuck on a custom network?
You can often use the network's block explorer to look up the transaction hash and see its status. Some explorers and third-party services offer tools to try to cancel or speed up pending transactions.

Why would I need to add a custom network instead of using Ethereum?
Many custom networks, especially Layer 2 solutions, offer significantly lower transaction fees and faster speeds than the Ethereum mainnet. This makes them ideal for everyday transactions, gaming, and exploring dapps without high costs.