The Open Bank Project provides an open source developer friendly “API for banks” that developers and companies can use to build innovative applications and services based on the account holders transaction data. It uses a secure, enterprise ready technology stack and supports secure Internet protocols such as OAuth. The Open Bank Project exposes transaction data in a simple and consistent structure by abstracting away the peculiarities of each banking system. This is achieved by “connectors” that interface between the OBP API and each core banking system. This enables application developers to write an app once, and use it for many banks.