Aave, MetaMask and Mastercard have partnered to enable users to spend certain decentralised finance assets via the MetaMask Card. The arrangement links Aave's yield-bearing tokens to a payment card that runs on Mastercard's network.
In Europe, the setup lets users spend crypto directly from a self-custody wallet at merchants that accept Mastercard, while eligible balances continue earning yield until the point of purchase. The card supports mUSD and USDC linked to Aave, as well as tokens including wETH, USDC, and USDT.
The move brings together a major DeFi lending protocol, one of the best-known crypto wallets and a global card network as digital asset groups try to connect blockchain-based products with established payment systems. A central question has been whether users can spend on-chain assets without first moving them into conventional bank or card accounts.
Under the company's model, users hold a receipt token for mUSD in a MetaMask wallet after depositing funds into Aave. When they purchase with the MetaMask Card, the required amount is converted to fiat at the point of sale, and the transaction is settled on Linea, the Ethereum layer-2 network developed by Consensys.
According to the companies, the card launched in Europe in July 2025. The new Aave link extends that product by adding access to assets that continue to accrue yield in real time until the card is used.
How it works
The structure relies on Aave's aTokens, which represent deposits in the lending protocol and increase in value as interest accrues. In practice, users can keep funds in Aave via MetaMask and use the card for everyday spending without first separating the spending balance from the yield-generating position.
That approach addresses a long-standing friction point in crypto payments. Many earlier card products required users to pre-fund an account with converted fiat money or transfer digital assets into a custodial environment before they could spend them.
By contrast, self-custody card products aim to leave users in control of their digital assets until the final stage of a transaction. Mastercard has been working with blockchain firms on card frameworks that align with existing payment standards while meeting compliance and settlement requirements.
Market push
For Aave, the partnership gives one of the largest DeFi lending protocols a route into consumer payments. It said it has more than USD $70 billion in net deposits and pointed to its record of managing large pools of assets over several years as a reason MetaMask chose it as a lending partner.
MetaMask has been expanding its wallet offering beyond token storage and swaps into areas such as on-chain saving and spending. The MetaMask Card, together with the wallet's existing earn features, reflects a broader push by crypto platforms to make digital assets more usable in everyday financial activity rather than limiting them to trading or long-term holding.
For Mastercard, the arrangement is another example of how established payment networks are trying to stay involved as digital asset infrastructure develops. Rather than replacing card rails, these projects tend to connect blockchain-based balances to the existing merchant acceptance network that consumers already use.
The companies framed the integration as a way to preserve key DeFi features such as self-custody while meeting the requirements of mainstream payments. They added that the model could support spending and saving in multiple currencies, including the dollar, euro and pound, through tokenised or stablecoin-based assets.
The current card supports standard mUSD, EURe, USDC, GBPE, USDT and wETH, among other tokens. The Aave integration stands out because it extends spending to yield-generating assets while keeping them available for immediate use at the till.
That distinction may help test whether DeFi products can gain wider traction beyond specialist crypto users. If consumers can hold assets on-chain, earn a return and spend through familiar card infrastructure without extra conversion steps, the gap between decentralised finance and conventional retail payments could narrow.
Transactions are settled instantly on Linea, and funds remain accessible until the card is tapped, creating what the companies described as a spendable, yield-bearing asset for day-to-day purchases.