A Complete Guide to Using Chainlist with MetaMask

The landscape of blockchain technology continues to evolve, with MetaMask remaining the cornerstone crypto wallet for accessing decentralized applications (dApps) and smart contracts. As the number of EVM-compatible networks such as Ethereum, Polygon, BNB Chain, Arbitrum, and Optimism expands, managing these connections becomes increasingly complex. Enter Chainlist, a powerful tool that simplifies the integration of custom networks into MetaMask. We provide an exhaustive, step-by-step guide to using Chainlist with MetaMask, covering every detail to ensure seamless connectivity for DeFi enthusiasts, NFT creators, and blockchain developers. This resource equips users with the knowledge to navigate the Web3 ecosystem with precision and confidence.

What Is Chainlist and How It Enhances MetaMask

Chainlist operates as a comprehensive directory for EVM-compatible blockchain networks, offering verified details including Chain IDs, RPC URLs, currency symbols, and block explorer URLs. As of June 2025, it supports more than 385 networks, encompassing both mainnets and testnets, making it an essential companion for MetaMask users. The platform eliminates the need for manual configuration, which often leads to errors or security risks when connecting to unverified networks.

MetaMask, available as a browser extension and mobile app, serves as the primary interface for interacting with blockchain networks. Its flexibility to support custom network additions is a key feature, but the process requires accurate data entry. By pairing Chainlist with MetaMask, we streamline this task, enabling instant access to networks like Avalanche C-Chain, Goerli Testnet, and zkSync. This combination is ideal for users engaging in DeFi trading, NFT marketplaces, or smart contract development.

Prerequisites for Using Chainlist with MetaMask

Before embarking on the journey to integrate Chainlist with MetaMask, ensure the following are in place:

  • MetaMask Setup: Install the MetaMask extension from https://metamask.io for browsers such as Chrome, Firefox, Edge, or Brave, or download the MetaMask app from the iOS App Store or Google Play Store.
  • Wallet Configuration: Create or import a MetaMask wallet with a secure seed phrase and password, keeping the phrase offline for safety.
  • Internet Access: A stable connection is critical for interacting with Chainlist and approving network additions.
  • Technical Familiarity: Knowledge of RPC endpoints, Chain IDs, and network parameters enhances the process.

With these essentials met, we proceed to harness the full potential of Chainlist with MetaMask.

Step-by-Step Process to Use Chainlist with MetaMask

We deliver a detailed, actionable process to use Chainlist with MetaMask, tailored for both desktop and mobile users.

Step 1: Navigate to the Chainlist Website

Open your browser and visit the official Chainlist website at https://chainid.network. The site features an intuitive interface with a searchable list of EVM networks, updated in real time to reflect new additions. Bookmark the URL to prevent access to phishing sites, which often imitate legitimate domains. The Chainlist homepage includes a search bar and network filters for easy navigation.

Security Reminder: Verify the URL is chainid.network or chainlist.org. Unauthorized sites pose risks to wallet security.

Step 2: Connect MetaMask to Chainlist

Establish the connection between MetaMask and Chainlist with these steps:

  1. Locate the “Connect Wallet” button in the top-right corner of the Chainlist homepage.
  2. Click “Connect Wallet” and choose MetaMask from the available options.
  3. MetaMask displays a prompt to select an account; choose the desired one and click “Next”.
  4. Approve the connection by clicking “Connect” in the MetaMask pop-up.
  5. Your wallet address will appear, confirming the link.

Switch accounts by revisiting MetaMask and reconnecting as necessary.

Step 3: Select the Desired Network

Find the target network using Chainlist’s robust search functionality:

  1. Type the network name (e.g., Polygon, Arbitrum, Sepolia) or Chain ID (e.g., 137, 42161, 11155111) into the search bar.
  2. Browse the results or use the “Include Testnets” toggle to access development networks.
  3. Examine the network details, including Chain ID, RPC URL, and currency symbol, to ensure accuracy.

For example, searching Optimism reveals its Chain ID (10), RPC URL (https://mainnet.optimism.io), and currency (ETH).

Step 4: Add the Network to MetaMask

Incorporate the network into MetaMask with these instructions:

  1. Click the “Add Chain” or “Add to MetaMask” button next to the network.
  2. MetaMask presents a confirmation window with details such as:
  3. Review the information and click “Approve” to proceed.
  4. Select “Switch Network” to activate or “Close” to stay on the current network.

The network is now available in your MetaMask interface.

Step 5: Verify Network Integration

Confirm the network’s successful addition:

  1. Open MetaMask and select the new network from the network dropdown.
  2. Ensure it loads without issues.
  3. Visit the network’s block explorer (e.g., https://optimistic.etherscan.io for Optimism) to verify your address and transactions.

Retry the process if the network does not appear.

Mobile Users: Using Chainlist via MetaMask App

For MetaMask mobile app users:

  1. Open the MetaMask app on your iOS or Android device.
  2. Tap the browser icon to access the in-app browser.
  3. Enter https://chainid.network in the address bar.
  4. Follow the desktop steps: connect wallet, search network, and add via “Add Chain”.
  5. Approve and switch networks as prompted.

This ensures a consistent experience across devices.

Best Practices for Secure Usage

Safeguard your MetaMask wallet when using Chainlist with these measures:

  • Cross-Check Details: Verify Chain IDs, RPC URLs, and block explorer links with official network documentation or platforms like CoinMarketCap.
  • Use Trusted Sources: Access Chainlist only via chainid.network or chainlist.org. Avoid unverified links.
  • Research Unlisted Networks: For networks not on Chainlist, consult official websites, Twitter, and Discord channels before manual setup.
  • Monitor Activity: Track MetaMask transactions using block explorers like Etherscan.
  • Enable 2FA: Secure associated email or phone accounts with two-factor authentication.
  • Secure Connection: Avoid public Wi-Fi when connecting to Chainlist.

These practices ensure a secure network integration process.

Discover these prominent networks and their use cases:

  • Polygon (Chain ID: 137): A Layer 2 solution for low-cost transactions and NFT minting. Currency: MATIC.
  • BNB Chain (Chain ID: 56): A high-speed chain for dApps and DeFi. Currency: BNB.
  • Arbitrum (Chain ID: 42161): A Layer 2 rollup for efficient scaling. Currency: ETH.
  • Avalanche C-Chain (Chain ID: 43114): A versatile platform for enterprise solutions. Currency: AVAX.
  • Sepolia Testnet (Chain ID: 11155111): A test network for developers. Currency: SepETH.

Adding these via Chainlist enriches your MetaMask functionality.

Troubleshooting Common Problems

Resolve these frequent issues:

  • Network Not Visible: Re-approve the addition or restart MetaMask. Check your internet.
  • Incorrect Chain ID: Remove and re-add with correct details.
  • Connection Errors: Clear browser cache, update MetaMask, or try an alternate RPC URL.
  • Suspicious Requests: Disconnect and verify the Chainlist URL. Contact MetaMask support.
  • Testnet Token Issues: Request tokens from official faucets.

Refer to MetaMask Help Center (https://support.metamask.io) for additional support.

Advanced Techniques for Chainlist and MetaMask

Optimize your experience with these strategies:

  • Custom RPCs: Add alternative RPC URLs from Infura or Alchemy via MetaMask Settings.
  • Batch Additions: Add multiple testnets using “Include Testnets”.
  • Gas Fee Management: Use GasNow or Polygon Gas Station to monitor costs.
  • Cross-Chain Transfers: Bridge assets via Polygon Bridge or Arbitrum Bridge.
  • Wallet Recovery: Export your seed phrase to a secure offline location.

These techniques enhance efficiency and control.

The Role of Chainlist and MetaMask in 2025

As blockchain adoption surges, Chainlist and MetaMask remain vital. They provide access to emerging networks like Linea, Scroll, and Base, supporting DeFi, NFTs, and Web3 development. This duo positions users at the forefront of blockchain innovation.

Conclusion

Using Chainlist with MetaMask offers a robust solution for adding and managing blockchain networks. Our comprehensive guide covers Ethereum, Polygon, and beyond, with detailed steps, security tips, and troubleshooting advice. Whether engaging in DeFi, NFT trading, or development, this integration unlocks the Web3 potential. Visit Tech Today for more crypto resources and stay ahead in the blockchain world.