We’re thrilled to announce a partnership between MetaMask, Linea, and Brevis to bring ZK Proof-powered rewards to MetaMask Card users—starting with a USDC lending and borrowing yield boost on Aave.
More than just a rewards campaign, this collaboration reflects MetaMask’s and Linea’s commitment to building transparent, verifiable systems that advances a shared vision of open, user-owned finance. It also signals Brevis’s growing adoption at scale, bringing our ZK-powered infrastructure to millions of potential participants. Together, we’re proving incentives can be fully verifiable and trustless, transparent, and low-friction—setting a new standard for the industry.
The Campaign at a Glance
Starting from13 August at 9:00am EST, if you are an Eligible MetaMask Card User (a user who completed at least 1 transaction with the card), you will earn a passive 2.4% fixed APR in rewards by lending or borrowing USDC on Aave’s Linea market—up to a combined collateral and debt cap of 5,000 USDC.
Reward calculations for each epoch (4 hours):
(min(lending + borrowing, 5000)2.4%36524)4
Start earning in 2 steps:
1. Lend or Borrow USDC on Aave’s Linea market
2. Claim your rewards on Incentra
There’s no opt-in process, no extra liquidity operations, and no hidden steps—your existing positions are all that’s needed to qualify. Rewards are calculated automatically and claimable on Incentra.
A Shared Vision for Transparent Web3 Incentives
The uniqueness of this campaign comes from the shared vision between three partnering teams. MetaMask and Linea have always stood for sovereignty, privacy, and transparency in the way people interact with Web3. Incentives in Web3, however, have often fallen short—relying on centralized tracking, opaque rules, or requiring users to jump through hoops to participate.
By launching this campaign on Brevis’s Incentra, MetaMask and Linea are showing what it means to put principles into action:
- No centralized rewards database — every calculation is backed by a cryptographic proof published directly on-chain.
- No unnecessary friction — works seamlessly with positions users already hold.
- No compromise on trust — anyone can verify payouts independently.
This is more than just a simple promotion—it’s a blueprint for transparent, permissionless, and verifiable Web3 rewards.
The ZK Technology Making It Possible
Behind the scenes, Brevis enables this simplicity through trustless reward attestation:
Every 4 hours, Brevis calculates the time-weighted average balance of each eligible user’s collateral and debt in Aave’s USDC market on Linea. It then generates a zero-knowledge proof that can be verified for three things:
- The address meets the campaign’s eligibility criteria.
- The address has open debt/collateral positions during the epoch.
- The reward amount is calculated correctly from fully on-chain Aave data.
This proof is verified on Incentra’s Linea smart contract, enabling rewards to be claimed without trusting any centralized service. Incentra, built on Brevis’s proof system, ensures every payout is fully transparent and secure.
A Milestone for Brevis and What’s Next
For Brevis, this collaboration marks a major milestone: our technology is now underpinning incentives for MetaMask Card’s and Linea’s global user base. It’s a clear demonstration that zero-knowledge infrastructure has reached the maturity and scalability required to support some of the largest and most trusted names in Web3.
Looking ahead, the same architecture behind this campaign can be extended far beyond a single protocol or market. We envision multi-protocol, cross-chain incentive programs where users can earn rewards for activity across the ecosystem—always with on-chain verifiability, always trustless.
MetaMask and Linea’s initiative sets a new standard for on-chain incentives. Brevis will continue to build the infrastructure that makes such programs possible, until this standard becomes the norm across all of Web3.
If you’re a MetaMask Card user, lending or borrowing USDC on Aave’s Linea market is all it takes to start earning. Rewards are live on Incentra—claim yours, and experience the future of on-chain incentives today.
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