An EVM-compatible Layer 2 testnet on Ethereum Sepolia, sequence-op-sepolia offers fast, low-cost transactions for dapp development using ETH gas and OP Stack tooling.
Sequence OP Sepolia is an EVM-equivalent OP Stack rollup testnet that uses test ETH for gas, built for developing and QA-ing Sequence smart wallets and account-abstraction flows before mainnet. It’s ideal for deploying and iterating on contracts, sponsored transactions (paymasters), session keys, multicalls, NFT/ERC-20 transfers, and cross-chain bridge testing; performance typically shows ~2s block time, near-zero average gas cost in test ETH, and throughput in the tens to low hundreds TPS with low background activity.
Unlike generic testnets, Sequence OP Sepolia is tightly integrated with the Sequence wallet/4337 stack (bundlers, paymasters, SDKs), letting teams test meta-transactions and gas sponsorship exactly as they will run on OP Stack mainnets. Its predictable ~2s blocks, low network contention, and effectively $0 test-ETH fees enable reliable performance comparisons (TPS in the tens to low hundreds under load) and faster CI pipelines versus busier public L2s.
sequence-op-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 sequence-op-sepolia, connect your wallet to thirdweb bridge, select your source chain, choose the token you want to bridge, select sequence-op-sepolia as the destination, enter the amount, and confirm the transaction. The bridge will handle the cross-chain transfer instantly.
To build on sequence-op-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 sequence-op-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 sequence-op-sepolia, ensure your wallet is connected to the sequence-op-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.
