UK Open Banking Standard (OBIE)

The UK Open Banking Standard was developed by the Open Banking Implementation Entity (OBIE) following the Competition and Markets Authority (CMA) Retail Banking Market Investigation Order of 2017. It is widely regarded as the pioneer open banking specification that has influenced standards development worldwide.

The standard defines comprehensive Read/Write APIs for account information, payment initiation, event notifications, and variable recurring payments. It includes detailed specifications for customer experience journeys, security profiles aligned with Financial-grade API (FAPI) 1.0 Advanced, and a trust framework for participant registration and certificate management.

Version 4.0 represents the most mature iteration, incorporating lessons from six years of production use by over 200 regulated third-party providers. The standard goes beyond basic PSD2 requirements, adding specifications for variable recurring payments (VRP), enhanced consent models, and dynamic client registration.

The UK standard has directly influenced open banking frameworks in Bahrain, Saudi Arabia, Nigeria, and other markets that have adopted or adapted its specifications. The Joint Regulatory Oversight Committee (JROC), co-chaired by the FCA and PSR, now oversees the strategic direction of UK open banking.