Merpay is a mobile payment service used within the Mercari app, where payment, usage management, and settlement are handled together. Mercari sale proceeds held as a Merpay balance, as well as points, can be spent in stores and online. The official site lists iD and code payments at Japanese partner locations such as convenience stores, restaurants, and drugstores. Its related Merpay Card lets users apply their balance and points to card purchases. The site includes usage guides, FAQs, articles, news, online payment information for merchants, company details, and statutory disclosures.