MetaMask, Linea, and Brevis partnered to introduce zero-knowledge proof (ZK)-powered rewards for MetaMask Card users starting with a 2.4% fixed APR boost on lending or borrowing USDC on the Linea market of Aave.
The program launched on August 13, 2025, and runs without opt-ins, further approvals, or further processes users merely hold their existing Aave positions to qualify.
Eligible MetaMask Card customers who have at least one successfully executed card transaction are rewarded for earning on paired lending and borrowing positions up to 5,000 USDC. Rewards are calculated in four-hour epochs time-weighted average balances, then settled fully on-chain.
Brevis powers the backend with its proof system on Incentra, enabling fully transparent and trustless disbursements. Each proof verifies three things: the user qualifies, has debt or collateral outstanding during the epoch, and is paid the correct payment amount from Aave’s on-chain data.
The collaboration is intended to bypass the constraints of traditional Web3 incentive models, which have a tendency towards using centralized oversight or sophisticated contribution standards. With the use of ZK proofs, partners ensure rewards can be verified, smooth, and cannot be tampered with.
This is more than promotion it’s a blueprint for open, permissionless, and tamperable Web3 incentives,” the release added. MetaMask and Linea, which are committed to sovereignty and openness, identify the program as a step toward widespread application of on-chain rewards.
Brevis views the partnership as a milestone toward scaling ZK infrastructure for widespread application of crypto with the potential reach of extension to multi-protocol, cross-chain reward systems.
With the rewards now being housed on Incentra, MetaMask Card users who lend or borrow USDC on the Linea market of Aave can enjoy their rewards and benefit from the vision of the partners for on-chain and trustless finance.
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