According to Foresight News, Chainlink has partnered with Mastercard to enable nearly 3 billion cardholders to purchase crypto assets on-chain, thereby expanding access to decentralized finance. This service integrates several participants, including Shift4, zerohash, XSwap, and Uniswap, and utilizes Chainlink's interoperability protocol to facilitate the exchange of transaction data between card networks and multiple blockchains.