How to fill in the block browser URL when adding a network in MetaMask?

Adding a custom network to MetaMask requires the correct block explorer URL; using the wrong URL (e.g., using Etherscan for BSC) prevents transaction verification and balance display. Always check the network's official documentation for the accurate URL.

Mar 13, 2025 at 12:10 pm

Key Points:

• Understanding the purpose of a block explorer URL in MetaMask.
• Identifying the correct block explorer URL for your desired network.
• Step-by-step instructions on adding a custom network to MetaMask, including the block explorer input.
• Troubleshooting common issues when entering the block explorer URL.
• Addressing specific network examples (e.g., Polygon, Binance Smart Chain).

How to Fill in the Block Browser URL When Adding a Network in MetaMask?

MetaMask, a popular Ethereum wallet, allows users to interact with various blockchain networks beyond the Ethereum mainnet. Adding a custom network requires providing specific network details, including a block explorer URL. This URL is crucial as it allows MetaMask to verify transactions and display relevant information about your assets on that specific network. Incorrectly inputting this URL will prevent MetaMask from properly functioning with the chosen network.

The block explorer URL is essentially the website address of a service that indexes and displays data from the blockchain. Think of it as a search engine specifically for blockchain transactions. Different blockchains have different explorers. For example, Etherscan is commonly used for Ethereum, while BscScan serves the Binance Smart Chain. Using the wrong explorer will result in MetaMask being unable to verify transactions or display balances correctly.

Before adding a custom network, you must identify the correct block explorer URL. This information is usually readily available on the network's official website or documentation. Look for sections on "explorers," "block explorers," or similar terminology. The URL should be a valid website address (starting with "https://"). Double-check the URL for accuracy; a simple typo can prevent MetaMask from functioning correctly.

Adding a custom network in MetaMask involves several steps, with the block explorer URL being one of the key pieces of information:

• Open MetaMask: Launch the MetaMask extension in your browser.
• Access Settings: Click on the three dots in the top right corner, and select "Settings."
• Navigate to Networks: In the settings menu, select "Networks."
• Add Network: Click on the "Add Network" button.

• Input Network Details: You'll need to fill in the following fields:

  • Network Name: A descriptive name for the network (e.g., "Polygon Mainnet").
  • New RPC URL: The RPC URL provided by the network. This is crucial for communication with the network.
  • Chain ID: A unique numerical identifier for the network.
  • Currency Symbol: The symbol of the network's native token (e.g., "MATIC" for Polygon).
  • Block Explorer URL: This is where you input the correct block explorer URL. This is the field we are focusing on in this article.
  • Block Explorer API URL (Optional): Some networks may require this field, but it's often optional.

After entering all the details, including the correct block explorer URL, click "Save." MetaMask will then add the new network, allowing you to interact with it. If you encounter errors, double-check all the provided information, paying close attention to the block explorer URL and RPC URL.

Let's consider some specific examples. For the Polygon network, a common block explorer URL is https://polygonscan.com/. For the Binance Smart Chain (BSC), you might use https://bscscan.com/. Always verify the correct URL from the official network documentation to avoid issues. Incorrect URLs will often result in error messages within MetaMask.

Troubleshooting:

If MetaMask fails to add the network, review these points:

• Verify the URL: Ensure the block explorer URL is accurate and correctly typed.
• Check Network Details: Confirm all other network details (RPC URL, Chain ID, etc.) are correct.
• Network Status: Check if the network itself is experiencing any outages or issues.
• MetaMask Update: Ensure MetaMask is updated to the latest version.

If problems persist, consult the official MetaMask support resources or the documentation for the specific network you are trying to add.

Common Questions:

Q: What happens if I use the wrong block explorer URL?

A: MetaMask will likely fail to connect to the network properly. You won't be able to see your balances, send or receive tokens, or view transaction history accurately. It might display errors indicating it cannot find the network or verify transactions.

Q: Where can I find the correct block explorer URL for a specific network?

A: The correct URL is usually found on the official website of the specific blockchain network. Look for sections dedicated to explorers, block explorers, or similar terms. The network's documentation will also often provide this information.

Q: Can I use any block explorer URL, or does it have to be a specific one?

A: No, you cannot use just any block explorer URL. It must be a block explorer specifically designed for the blockchain network you are trying to add. Using the wrong explorer will prevent MetaMask from functioning correctly with that network.

Q: My MetaMask is showing an error after I added a network. What should I do?

A: Carefully double-check all the information you entered, including the network name, RPC URL, Chain ID, currency symbol, and especially the block explorer URL. Ensure there are no typos. If the issue persists, check the network's status and ensure MetaMask is updated. Consult MetaMask support or the network's documentation if the problem continues.

Q: What if the network I'm adding doesn't have a block explorer listed on its website?

A: This is uncommon for established networks. If you cannot find a block explorer, it might indicate the network is less developed or has limited public information available. Proceed with caution when using less-established networks.