World Chain Sepolia is the public EVM-compatible testnet for World Chain, an OP Stack Layer-2 secured by Ethereum, using Sepolia ETH for gas and integrating World ID for human-first features. It’s used to test cross-chain bridges, smart contracts, account abstraction/paymasters, and sybil‑resistant flows like priority transactions and gas grants for verified humans before mainnet deployment. As an OP Stack L2 it targets ~2s block times, delivers tens-to-hundreds TPS under load, and offers near‑zero testnet fees (faucet-funded); check the network explorer for live activity and average gas cost.
World Chain Sepolia is unique for its human-first blockspace: optional World ID gives verified users priority throughput and fee grants, mitigating bots while preserving open access. Unlike generic testnets, it maintains EVM equivalence on the OP Stack, uses ETH for gas, and benefits from EIP‑4844 data blobs—yielding ~2s blocks, fast finality, and sub‑cent L2 fee profiles on comparable mainnets. This blend of sybil resistance plus Ethereum‑aligned performance makes it ideal for high‑activity dApps, payments, and identity‑aware onchain experiences.
World Chain Sepolia 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 World Chain Sepolia, connect your wallet to thirdweb bridge, select your source chain, choose the token you want to bridge, select World Chain Sepolia as the destination, enter the amount, and confirm the transaction. The bridge will handle the cross-chain transfer instantly.
To build on World Chain Sepolia 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 World Chain Sepolia 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 World Chain Sepolia, ensure your wallet is connected to the World Chain Sepolia network, enter the recipient's address, specify the amount of ETH to send, review the gas fee, and confirm the transaction in your wallet.