A modular Ethereum Layer 2 testnet, Mantle Sepolia Testnet uses EigenDA for low-cost data availability and enables fast, EVM-compatible dApp testing with MNT gas.
Mantle Sepolia Testnet is Mantle’s public Ethereum Layer-2 test network that mirrors the mainnet’s optimistic rollup with modular data availability (EigenDA), using test MNT as gas. It’s used for deploying and QA’ing EVM smart contracts, cross-chain bridges/messaging, wallets and indexers, and for gas/latency benchmarking with faucet and explorer support. Performance characteristics: block time in the low-seconds range, typical double-digit TPS under normal load, and very low L2 fees per transaction, with live activity visible on the testnet explorer.
Mantle Sepolia is unique for its modular architecture that offloads data to EigenDA, reducing L1 data costs versus L2s that post calldata/blobs only, which translates to lower average gas per call and higher throughput under load. It preserves EVM equivalence and MNT-denominated gas while providing a Sepolia-aligned bridge, so developers can test end-to-end flows with mainnet-like block speed and cost profiles. Compared with other testnets, Mantle Sepolia typically offers seconds-level blocks, low fee-per-tx, and sustained double-digit TPS, helping teams produce performance baselines that transfer cleanly to Mantle mainnet.
Mantle Sepolia Testnet uses MNT as the gas token for transaction fees. You can obtain MNT by bridging from other chains or purchasing using thirdweb Bridge, or through faucets (for testnet).
To bridge MNT to Mantle Sepolia Testnet, connect your wallet to thirdweb bridge, select your source chain, choose the token you want to bridge, select Mantle Sepolia Testnet as the destination, enter the amount, and confirm the transaction. The bridge will handle the cross-chain transfer instantly.
To build on Mantle 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 Mantle 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 MNT on Mantle Sepolia Testnet, ensure your wallet is connected to the Mantle Sepolia Testnet network, enter the recipient's address, specify the amount of MNT to send, review the gas fee, and confirm the transaction in your wallet.
