Starbucks is among the companies signed up for the new initiative.
MasterPass is MasterCard's digital wallet, allowing users to buy on 30,000 retail partners' websites in a matter of clicks, also supporting tangible stores by allowing payment via QR code scan or NFC.
And now, MasterCard is taking the platform in-app to deliver a similar purchasing experience to the one it delivers online.
Starbucks Australia, Forbes Digital Commerce, Asian bookstore NoQ and Shaw Theatres Singapore are among the first companies to add MasterPass to their mobile apps.
Ed McLaughlin, chief emerging payments officer at MasterCard, said: "MasterPass in-app payments is the latest offering from MasterCard to address the specific needs of the digital ecosystem. We’re creating great experiences for consumers across all channels and all devices, and enabling merchants to reach new consumers in ways not possible in the pre-digital world.
"We’re also developing a framework to make all payments using MasterPass as or more secure than anything we can do on cards today, ensuring that consumers can benefit from the highest possible levels of security."
MasterPass in-app payments will launch for developers and merchants in the Q2.