How do I add a custom RPC network to MetaMask?

Adding a custom RPC network to MetaMask lets you connect to various blockchains beyond Ethereum mainnet, enhancing your crypto interactions.

Apr 15, 2025 at 09:22 pm

Adding a custom RPC network to MetaMask allows you to interact with different blockchain networks beyond the default Ethereum mainnet. This can be particularly useful for developers and users who want to connect to testnets, private networks, or other EVM-compatible blockchains. In this article, we will guide you through the process of adding a custom RPC network to MetaMask, ensuring you can seamlessly switch between different networks.

Understanding RPC and Its Importance

Before diving into the steps, it's important to understand what an RPC (Remote Procedure Call) is and why it's crucial for blockchain interactions. RPC is a protocol that allows a program to execute a procedure on another computer, which in the context of blockchain, enables your wallet to communicate with different networks. By adding a custom RPC to MetaMask, you can connect to any EVM-compatible network, expanding your capabilities within the crypto ecosystem.

Preparing to Add a Custom RPC Network

To add a custom RPC network, you'll need specific details about the network you want to connect to. These details typically include the Network Name, New RPC URL, Chain ID, Currency Symbol, and Block Explorer URL. You can usually find these details on the official website of the network or through community resources. Ensure you have these details ready before proceeding.

Step-by-Step Guide to Adding a Custom RPC Network

Here's how you can add a custom RPC network to MetaMask:

• Open MetaMask: Launch the MetaMask extension or mobile app and ensure you are logged into your account.
• Access Settings: Click on the three dots in the top right corner of the MetaMask interface and select Settings.
• Navigate to Networks: In the settings menu, click on Networks.
• Add New Network: Click on Add Network or Add a Network button.
• Enter Network Details: Fill in the required fields with the details you gathered earlier:
  • Network Name: Enter the name of the network (e.g., "Rinkeby Testnet").
  • New RPC URL: Enter the RPC URL for the network (e.g., "https://rinkeby.infura.io/v3/your-project-id").
  • Chain ID: Enter the chain ID for the network (e.g., "4" for Rinkeby).
  • Currency Symbol: Enter the symbol for the network's native currency (e.g., "ETH").
  • Block Explorer URL: Enter the URL for the network's block explorer (e.g., "https://rinkeby.etherscan.io").
• Save the Network: After entering all the details, click Save to add the new network to MetaMask.

Switching Between Networks in MetaMask

Once you've added a custom RPC network, you can easily switch between different networks within MetaMask. Here's how:

• Open MetaMask: Launch the MetaMask extension or mobile app.
• Select Network: Click on the network name at the top of the MetaMask interface.
• Choose Network: From the dropdown menu, select the custom RPC network you added.

Troubleshooting Common Issues

Sometimes, you might encounter issues when adding or switching to a custom RPC network. Here are some common problems and their solutions:

• Invalid Network Details: Ensure all the details you entered are correct. Double-check the RPC URL, Chain ID, and other fields.
• Connection Issues: If you can't connect to the network, check if the RPC URL is correct and if the network is operational. You might need to use a different RPC provider.
• Network Not Appearing: If the network doesn't appear in the list after adding, try refreshing the MetaMask interface or restarting the extension/app.

Verifying the Added Network

After adding a custom RPC network, it's a good practice to verify that it's working correctly. Here's how you can do that:

• Send a Test Transaction: Send a small transaction to another address on the network to ensure it processes correctly.
• Check Balance: Verify that your balance is displayed correctly on the new network.
• Use a Dapp: Connect to a decentralized application (Dapp) that supports the network and ensure you can interact with it seamlessly.

Frequently Asked Questions

Q: Can I add multiple custom RPC networks to MetaMask?

A: Yes, you can add multiple custom RPC networks to MetaMask. Simply follow the steps outlined above for each network you want to add. You can switch between them using the network selector in MetaMask.

Q: Is it safe to add custom RPC networks to MetaMask?

A: Adding custom RPC networks is generally safe as long as you use trusted sources for the network details. Be cautious of phishing attempts and only use RPC URLs from reputable providers.

Q: Can I remove a custom RPC network from MetaMask?

A: Yes, you can remove a custom RPC network from MetaMask. Go to Settings > Networks, find the network you want to remove, and click on the Delete button next to it.

Q: Do I need to add a custom RPC network to use a specific blockchain?

A: Not always. Some blockchains are already supported by MetaMask by default, such as Ethereum mainnet and popular testnets. However, for less common or private networks, you'll need to add a custom RPC network.