How to Add Linea Sepolia to MetaMask

·

Linea Sepolia is a powerful testing environment for developers building on Linea—a cutting-edge Layer 2 (L2) Ethereum blockchain powered by zero-knowledge (ZK) technology. Developed by Consensys, Linea enables faster and more cost-effective transactions while maintaining Ethereum’s security standards. As the original Linea Goerli testnet has been deprecated, the community has transitioned to Linea Sepolia, aligning with Ethereum’s broader shift toward the Sepolia testing framework.

This guide walks you through how to add Linea Sepolia to MetaMask, configure your wallet correctly, and obtain free test ETH via a reliable faucet. Whether you're a Web3 developer or blockchain enthusiast, this step-by-step tutorial ensures you can begin testing decentralized applications (dApps) in a risk-free environment.

Understanding Linea Sepolia Testnet

Linea Sepolia offers developers a secure and scalable playground for experimenting with smart contracts, dApps, and transaction flows—without risking real funds. Since it mirrors the functionality of the Linea mainnet, it's ideal for debugging, integration testing, and performance evaluation before deployment.

The native currency used on this testnet is test ETH, which holds no monetary value but functions identically to real ETH within the network. This makes it perfect for simulating real-world interactions such as token swaps, NFT minting, and contract calls.

To get started, two key components are required:

Before proceeding, ensure that:

👉 Generate instant access to high-performance blockchain nodes and streamline your development workflow.

Step 1: Obtain a Linea Sepolia Node Endpoint

To interact with the Linea Sepolia network, your wallet needs a connection point—a JSON-RPC endpoint. While public RPCs exist, they often suffer from latency or rate limits. For optimal performance, use a dedicated node service.

Here’s how to generate a free, private endpoint:

  1. Visit a trusted node provider platform and sign up using your MetaMask wallet address.
  2. Navigate to the dashboard and select Linea under My Endpoints.
  3. Choose the Sepolia testnet and select JSON-RPC API.
  4. Click Get to generate your unique endpoint URL.

This personal RPC link allows up to 40,000 blockchain requests per day at 60 requests per second—more than sufficient for individual developers and small teams conducting regular testing activities.

Keep this URL handy; you’ll need it when adding the network to MetaMask.

Step 2: Add Linea Sepolia Network to MetaMask

Now that you have your node endpoint, it’s time to integrate the network into your MetaMask wallet.

Follow these steps:

  1. Open the MetaMask extension in your browser and unlock your wallet.
  2. Click the network dropdown in the top-left corner (it usually shows "Ethereum Mainnet").
  3. Select Add Network > Add a network manually.

You’ll now be prompted to enter the following network details:

Once all fields are filled accurately, click Save. MetaMask will validate the connection and add the network automatically.

You should now see “Linea Sepolia” selected as your active network, with your wallet balance displayed in test ETH (initially zero).

Step 3: Switch and Verify the Active Network

After successfully adding the network, confirm that:

Note: You cannot buy, swap, or bridge real assets into testnets. All funds must come from a testnet faucet.

How to Get Free Test ETH on Linea Sepolia

With your wallet connected, the next step is acquiring test ETH to interact with dApps and deploy contracts.

Most faucets require minimal prerequisites:

Recommended Faucet Process:

  1. Go to a trusted Linea Sepolia faucet provider (such as GetBlock or community-run options).
  2. Select Linea Sepolia from the list of available networks.
  3. Connect your wallet or paste your MetaMask address.
  4. Complete any required CAPTCHA or social task.
  5. Click Claim Tokens.

Within seconds, test ETH should appear in your MetaMask wallet under the Linea Sepolia network.

👉 Access fast, reliable testnet tokens and accelerate your dApp development cycle today.

Frequently Asked Questions (FAQ)

Q: Is Linea Goerli still usable?
A: No. The Linea Goerli testnet was officially deprecated in May 2024. All developers are encouraged to migrate to Linea Sepolia for ongoing support and updated features.

Q: Why do I need a custom RPC URL instead of using a public one?
A: Public RPCs are often overloaded, leading to slow responses or failed transactions. A private endpoint ensures stable, high-speed access—critical during intensive development phases.

Q: Can I transfer test ETH from other testnets to Linea Sepolia?
A: No. Testnets operate independently. Test ETH must be obtained directly from a Linea Sepolia faucet.

Q: Are there daily limits on faucet claims?
A: Yes. Most faucets impose limits (e.g., 0.5–1 test ETH every 24 hours) to prevent abuse and ensure fair usage across the developer community.

Q: Can I deploy smart contracts using test ETH?
A: Absolutely. Test ETH covers gas fees just like real ETH on mainnet, allowing full simulation of contract deployment, execution, and interaction.

Q: Is my MetaMask seed phrase safe during this process?
A: Yes—as long as you never share it. Adding networks doesn’t require revealing your recovery phrase. Always avoid third-party sites asking for sensitive information.

Final Thoughts

Setting up Linea Sepolia in MetaMask is a straightforward yet essential step for any developer working with ZK-rollups or building scalable Ethereum solutions. With its EVM-equivalence, robust infrastructure, and seamless tooling integration, Linea lowers the barrier to L2 development while offering enterprise-grade performance.

By following this guide, you’ve learned how to:

As Ethereum continues evolving, mastering tools like Linea positions you at the forefront of innovation in Web3.

👉 Start building on next-gen blockchains with seamless wallet integration and instant node access.