Linea is a Layer 2 (L2) Ethereum blockchain leveraging zero-knowledge (ZK) technology, developed by Consensys. Its Sepolia testnet replaces the deprecated Goerli version, offering a secure environment for developers to test applications without real-world costs. This guide explains how to add Linea Sepolia to MetaMask and acquire test ETH via faucets.
Understanding Linea Sepolia
Linea stands out for its scalability and security, making its testnet invaluable for developers. Test ETH on Linea Sepolia holds no monetary value but enables interaction with decentralized applications (dApps) risk-free. To begin, you’ll need to integrate Linea Sepolia with MetaMask, a popular Ethereum wallet.
👉 Explore Linea’s developer tools
Prerequisites
- MetaMask Setup: Ensure the MetaMask extension is installed and your wallet is unlocked.
- Linea Sepolia Endpoint: Create a free JSON-RPC endpoint via GetBlock to connect to the blockchain.
Creating a Linea Sepolia Endpoint
- Sign up on GetBlock using your MetaMask address.
- Navigate to My endpoints, select Linea Protocol.
- Choose Sepolia Network and JSON-RPC API.
- Click Get to generate your free endpoint (40,000 daily requests at 60 RPS).
Step-by-Step Guide to Add Linea Sepolia to MetaMask
Step 1: Access Network Settings
- Open MetaMask, click the three-dot menu (⋮) → Settings → Networks.
- Select Add Network → Add a network manually.
Step 2: Enter Linea Sepolia Parameters
Use these details to configure the network:
| Parameter | Value |
|---|---|
| Network Name | Linea Sepolia |
| RPC URL | Your GetBlock endpoint (e.g., https://go.getblock.io/...) |
| Chain ID | 59141 |
| Currency Symbol | ETH |
| Block Explorer | https://sepolia.lineascan.build/ |
👉 Need help? Check MetaMask docs
Step 3: Switch to Linea Sepolia Network
- Select "Linea Sepolia" from the network dropdown in MetaMask.
- Verify your testnet address displays correctly. Note: Token swaps/purchases are disabled in testnets.
Acquiring Test ETH via Linea Faucet
Test ETH is available through faucets like GetBlock’s Linea Sepolia Faucet:
- Select Linea Sepolia → Try Now.
- Enter your testnet address and complete the CAPTCHA.
- Receive test ETH (limited per claim).
Note: Mainnet ETH (minimal amount) may be required to prevent spam.
FAQ
Why use Linea Sepolia over Goerli?
Sepolia is newer, more secure, and widely adopted by L2 blockchains post-Goerli’s deprecation (May 2024).
Can I bridge testnet ETH to mainnet?
No. Test ETH has no value and cannot be transferred to mainnet.
How often can I use the faucet?
Faucets impose daily limits to ensure fair distribution. Check GetBlock’s terms for specifics.
Conclusion
Linea Sepolia provides a cost-free, secure sandbox for developers. Migrating from Goerli to Sepolia ensures access to updated features and better stability. Start testing today with MetaMask and GetBlock’s faucet!