How to Add Sepolia to MetaMask

Register with an RPC Provider

To deploy smart contracts on the Sepolia testnet, you first need to set up an account with an RPC provider. If you already have an account, simply sign in. Leading RPC providers offer free plans that fully support Sepolia, giving Web3 developers access to robust, no-cost tiers.

With a free plan, you get access to complete archive data, increased request limits, advanced APIs, and reliable, scalable, and accurate node solutions for Web3 projects.

Create a Sepolia Application

From your dashboard, click the "create app" button to start a new project. Then, enter the following information about your dapp:

• Dapp Name – Enter your application's name
• Description – Describe your application
• Chain – Select "Ethereum"
• Network – Select "Sepolia"

After you complete these settings, the system will generate an RPC endpoint for the Sepolia testnet.

Automatically Add Sepolia to MetaMask

Most RPC providers offer a one-click tool to add your new Sepolia RPC URL directly to MetaMask.

Open your newly created dapp and click "Add to Wallet." Then, authorize the provider to add the Sepolia network to your wallet. This is the fastest method—your setup completes in just a few clicks.

Manually Add Sepolia to MetaMask

To deploy smart contracts and test applications on Sepolia, you need to connect your wallet to the Sepolia network.

In MetaMask, click the network selector at the top of your wallet interface. Select "Add Network." At the bottom of the page, choose "Add a network manually."

Go to your RPC provider's dashboard, click "View Key," and copy the "HTTPS URL." Return to MetaMask and paste the Sepolia RPC URL into the network settings, along with the following details:

• Network Name – Sepolia Testnet
• New RPC URL – The HTTPS URL you copied (Sepolia RPC URL)
• Chain ID – 11155111
• Currency Symbol – SepoliaETH
• Block Explorer URL – The address of the Sepolia block explorer

Enter this information accurately to connect your MetaMask wallet to the Sepolia network.

Conclusion

Adding Sepolia to MetaMask is a critical step in decentralized application development. It lets you validate smart contract functionality before deploying to the Ethereum mainnet. Using your RPC provider’s automatic Sepolia RPC URL integration is the most efficient approach, but manual setup is also simple. Once you’ve completed setup, get free SepoliaETH from the provider’s Sepolia faucet and start building on the testnet right away.

FAQ

What is a Sepolia RPC URL?

The Sepolia RPC URL is the endpoint you use to connect to the Sepolia test network. With a URL such as https://sepolia.drpc.org, you can interact with blockchain nodes to send transactions and read data.

What is an RPC URL?

An RPC URL is a network address that enables wallets and dApps to communicate with blockchain networks. It acts as the endpoint for connecting to nodes when sending transactions or retrieving data. On the Sepolia testnet, it’s used for development and testing purposes.

How do I add the Sepolia network to MetaMask?

Go to the "Network" section in MetaMask, enter the RPC URL, Chain ID, and symbol, or use ChainList to configure automatically.