A payment API is a software interface that allows an application to programmatically request, initiate, query, or manage payment functions.
Stablecoin payment APIs can create payment requests, obtain deposit addresses, quote conversion amounts, check transaction status, initiate payouts, retrieve balances, and automate reconciliation. APIs allow payment functions to be embedded in merchant systems and other applications without requiring users to interact directly with the underlying blockchain or banking infrastructure.
An API defines how software systems exchange payment instructions and data. A payment gateway can expose an API while also providing merchant-facing checkout and routing functions.
APIs support automated and embedded payment services by standardizing how applications communicate with payment infrastructure.
An e-commerce platform can call a payment API to create a USDC invoice and later query whether the required amount has been received.