Jeff Bezos's 'API Mandate'

Jeff Bezos issued a company-wide mandate requiring all internal Amazon teams to expose their data and functionality through well-defined service interfaces, communicating only through these APIs. This enforced a service-oriented architecture internally.

Significance

This mandate fundamentally changed how Amazon's internal teams operated, fostering a culture of decoupled services and clear interfaces, which proved to be the blueprint for the public-facing AWS architecture.