A Layer 2 OP Stack rollup, Unichain Sepolia Testnet provides EVM compatibility, ETH gas, and Superchain interoperability for testing Uniswap-focused DeFi and liquidity apps.
Unichain Sepolia Testnet is the EVM‑equivalent test network for Unichain, an Ethereum Layer 2 built with the OP Stack and part of the Optimism Superchain; it uses Sepolia ETH for gas. It is used to safely test cross‑chain bridging, Uniswap‑focused dApps, and infrastructure under production‑like parameters before deploying to Unichain mainnet. For context, OP Stack testnets typically show ~2‑second block times, low single‑digit TPS during open testing, and near‑zero test‑ETH gas costs; verify live figures on the Unichain Sepolia explorer.
Unlike generic testnets, Unichain Sepolia is Superchain‑interoperable and OP Stack–compatible, so it inherits Ethereum security, EVM equivalence, and native support for the Optimism standard bridge and tooling while using ETH as gas. It is purpose‑built for the Uniswap ecosystem, so network settings mirror mainnet Unichain to make swap, routing, and cross‑chain bridge tests reproducible. In practical terms, expect second‑level finality, sub‑cent gas‑equivalent costs, and low‑to‑moderate public activity typical of curated L2 testnets; check the explorer for current TPS and average gas.
Unichain Sepolia Testnet uses ETH as the gas token for transaction fees. You can obtain ETH by bridging from other chains or purchasing using thirdweb Bridge, or through faucets (for testnet).
To bridge ETH to Unichain Sepolia Testnet, connect your wallet to thirdweb bridge, select your source chain, choose the token you want to bridge, select Unichain Sepolia Testnet as the destination, enter the amount, and confirm the transaction. The bridge will handle the cross-chain transfer instantly.
To build on Unichain Sepolia Testnet you can use thirdweb, which provides an easy way to build, monetize and scale your apps, games or agents. You can find detailed guides and documentation on https://portal.thirdweb.com to get started quickly.
To add Unichain Sepolia Testnet to your wallet, you can connect your wallet and click on [Add to Wallet] button at the top of the page. Alternatively, you can add the network manually using the RPC URL and chain details and add it to your wallet's network settings.
To send ETH on Unichain Sepolia Testnet, ensure your wallet is connected to the Unichain Sepolia Testnet network, enter the recipient's address, specify the amount of ETH to send, review the gas fee, and confirm the transaction in your wallet.