The document discusses the Open Payments Cloud (OPC) which aims to simplify building and deploying complex payment applications. The OPC combines diverse payment APIs into a robust framework, matches applications to financial institutions and payment providers, and avoids complicated licensing requirements. Developers can publish applications to the OPC, which deploys them with real financial institutions. The OPC incorporates third party APIs using "Paylets" that represent identities, payment instruments, transactions, and more. It provides tools like a Payment Application Modelling Language to build applications and a sandbox for testing.