API Evolution: Pure Storage introduced REST API 2.x to provide a more scalable, standardized, and performant way to automate FlashArray management. It uses a different authentication method (OAuth2 with API Clients) compared to the API Token-based method in 1.x.

Feature Freeze on 1.x: As of Purity 6.x and beyond, Pure Storage has designated REST API 1.x as " Legacy. " While 1.x is still supported for backward compatibility to ensure older scripts don ' t break, all new Purity features (such as specialized ActiveDR commands, advanced File Services, or new hardware capabilities) are only developed and exposed via REST API 2.x .

Side-by-Side Support: Contrary to option C, both versions are supported side-by-side on the same array. An administrator can run a script using 1.x for volume creation and another script using 2.x for performance monitoring simultaneously without contacting support.

Feature Parity: REST API 2.x has long since reached and exceeded the capabilities of 1.x. It offers improved filtering, pagination, and a more consistent object model (e.g., /volumes instead of multiple nested endpoints).

Best Practice: Pure Storage strongly recommends that all new automation projects use REST API 2.x to ensure access to the full suite of Purity features and to future-proof infrastructure-as-code (IaC) workflows.