Staking · Liquid Staking · mETH
Mantle Staked Ether (mETH) is a non-rebasing liquid staking token that is the staking backbone of the Mantle ecosystem, accruing ETH staking rewards.
L2-ecosystem ETH liquid staking.
mETH price
$2056.49
-0.7% 24h
Latest data · 15 min delay
Backed by the Mantle treasury and tightly integrated with the Mantle L2 ecosystem and its DeFi venues.
A value-accumulating (reward-bearing) ETH liquid staking receipt token issued by mETH Protocol on Ethereum L1. Balance stays fixed while its ETH exchange rate rises with consensus- and execution-layer staking rewards. Permissionless and non-custodial.
A composable liquid restaking token minted 1:1 when users deposit mETH via the Teller contract. Represents a portfolio of underlying restaking positions across EigenLayer, Symbiotic and Karak plus their AVSs, earning restaking rewards on top of base staking yield.
Governance token of mETH Protocol (genesis supply 5 billion). Holders vote on protocol direction including staking parameters, reward structures and strategic initiatives. TGE around late October 2024.
cmETH principal mETH is custodied in BoringVault and can move only to approved addresses/positions. PositionManagers are simple, non-upgradable contracts controlled by BoringVault that constrain permitted calls and integrate third-party restaking protocols; StrategistNodes rebalance the portfolio verified against a MerkleRoot.
5,000,000,000 COOK at genesis (Community 60% / Mantle Treasury 30% / Core Contributors 10%)
Mantle blog — Overview of $COOK~$1.1 billion mETH Protocol TVL at end of Q3 2025 (peak ~$2.19B prior)
Messari — State of Mantle Q3 20258-hour claim period on cmETH redemption; funds must be claimed within 60 days or the unstake restarts
Mantle blog — A Restaker's Guide to cmETHHow Mantle maps onto established TradFi structures, and where it diverges.
Repo / cash-management sweep on a Treasury position
Mantle
Like sweeping idle cash into an interest-bearing, redeemable instrument, staking ETH into mETH turns idle ETH into a yield-accruing, transferable claim whose value grows over time.
TradFi analogue
mETH yield comes from Ethereum PoS validation (variable, subject to slashing) rather than a contractual money-market rate; redemption is subject to on-chain unstake queues and smart-contract risk rather than a regulated custodian.
mETH Protocol
Issuer / operator Permissionless, non-custodial ETH liquid staking and restaking protocol (formerly 'Mantle LSP') deployed on Ethereum L1, issuing mETH and cmETH. Second core product of the Mantle ecosystem after Mantle Network L2.
Mantle (Mantle DAO / Treasury)
Governance & treasury backer mETH Protocol is governed by Mantle. Its launch was funded by staking Mantle Treasury ETH, sanctioned via Mantle Governance Proposal MIP-25. COOK is the protocol's dedicated governance token.
Key milestones: launches, upgrades, exploits and governance events.
Mantle LSP proposal (MIP-25)
ExecutedGenesis proposal for a Mantle liquid staking protocol posted on the Mantle governance forum; acceptance of MIP-25 sanctioned staking Mantle Treasury ETH to seed the protocol.
SourcemETH liquid staking protocol launch (permissionless)
ExecutedMantle LSP (later renamed mETH Protocol) fully launched on Ethereum mainnet in permissionless mode, minting the mETH reward-bearing token. Second core product of the Mantle ecosystem.
SourceCOOK governance token TGE
ExecutedmETH Protocol introduced COOK, its governance token (5 billion genesis supply), enabling holders to vote on protocol direction, staking parameters and reward structures.
SourcecmETH liquid restaking launch
ExecutedcmETH went live on mainnet as a 1:1 receipt token for restaked mETH, spanning EigenLayer, Symbiotic and Karak restaking positions.
SourcemETH (Mantle Staked Ether) is a reward-bearing ETH liquid staking token from mETH Protocol, deployed on Ethereum L1 and governed by Mantle. Staking ETH mints mETH; its exchange rate to ETH increases as staking rewards accrue.
cmETH (Mantle Restaked Ether) is a liquid restaking token minted 1:1 by depositing mETH. The underlying mETH keeps earning base ETH staking rewards, while cmETH additionally accrues rewards from restaking networks including EigenLayer, Symbiotic and Karak.
COOK is the governance token of mETH Protocol with a 5 billion genesis supply. It lets holders vote on the protocol's strategic direction, staking parameters and reward structures.
Redeeming cmETH for mETH uses a DelayedWithdraw flow with an 8-hour claim period; once claimable, users have 60 days to claim their funds or the unstaking process must be restarted.
Yes. The protocol has been reviewed across multiple releases by firms including Hexens, MixBytes, Secure3, Verilog, Quantstamp, BlockSec, Exvul and Fuzzland, covering the token/vault contracts, oracle, cmETH/BoringVault and COOK. Reports are published in the Mantle docs.
