Lesson 2 of Open Banking APIs: Documentation

API documentation is often treated as an afterthought — written once at launch and rarely updated to reflect how the API actually behaves in production. For Open Banking, where third-party developers and TPPs rely on accurate specifications, this gap creates real friction.

This second instalment of APIContext's Open Banking series looks at what good API documentation requires, where the most common gaps appear, and how active monitoring helps keep documentation honest by surfacing discrepancies between spec and reality.