How to Add Sepolia Testnet to MetaMask

As outlined above, the fastest way to add the verified RPC and Chain ID information to connect to the Sepolia Testnet is via Chainlist. Chainlist is an EVM information aggregator that was deployed and is maintained by the team behind Defillama.

You can connect to the Sepolia Testnet in 3 simple steps with this guide:

  1. Connect your MetaMask Wallet to ChainList.
  2. Use the search bar at the top of the page to find 'Sepolia'.
  3. Click on the 'Add to MetaMask' button, and the verified RPC information will be automatically added to your extension.
Add Sepolia to MetaMask

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What is Sepolia?

Sepolia is one of the Ethereum testnets, which is a version of the Ethereum network specifically designed for developers to test and experiment with their smart contracts and decentralized applications (dApps) before deploying them on the main Ethereum network.

By connecting to the testnet, developers can safely run tests and deploy contracts without using any real-world funds. This also allows them to easily debug any issues that may arise before eventually deploying on the mainnet. Sepolia is a very popular testnet as it’s extremely fast and reliable, making it ideal for conducting experiments and testing scenarios.

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How do I get Sepolia Testnet ETH?

To obtain Sepolia Testnet ETH, you can use a Sepolia Testnet faucet, which is a service that allows developers to request a small amount of testnet ETH to use for testing purposes. Here are the steps to obtain Sepolia Testnet ETH:

  1. Go to the Sepolia FaucETH website at https://faucet.sepolia.dev/.
  2. Enter your wallet address or ENS name in the input field provided on the page.
  3. Solve the captcha by clicking on the checkbox next to "I'm not a robot."
  4. Click the "Request funds" button.
  5. A pop-up window will appear, indicating that the transaction has been sent and the amount of Sepolia Testnet ETH that has been sent to your wallet.

After completing these steps, you should receive the requested Sepolia Testnet ETH in your wallet shortly. You can then use these testnet tokens to test and experiment with your dApps and smart contracts on the Sepolia Testnet without incurring any actual costs or risks associated with the main Ethereum network.

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Bottom Line

In summary, the Sepolia Testnet is a version of the Ethereum network designed for developers to test and experiment with their dApps and smart contracts before deploying them on the main Ethereum network. In order to connect to this network via MetaMask, you can use the verified Chain ID and RPC information provided by Chainlist.

Once connected, developers can obtain Sepolia Testnet ETH through a faucet to test and experiment with their applications without incurring any actual costs or risks associated with the main Ethereum network. By using the Sepolia Testnet, developers can identify and fix bugs in their applications and prevent costly mistakes and security vulnerabilities.