An API is a set of protocols and tools that allows different software applications to communicate with each other. In banking, APIs enable third-party apps to access bank data and services.

Banking APIs power features like account balance checks in budgeting apps, payment initiation from e-commerce sites, and data aggregation across multiple accounts. For example, the bank statement converter API can automate conversion of PDF statements into Excel and CSV. Open banking regulations have accelerated API adoption in financial services. Protocols like x402 enable API-native payments.