Apple’s developer documentation explains how eligible apps can access a server model running on Private Cloud Compute through the Foundation Models framework for larger context and more complex reasoning.

This is not a general public API

Apple does not describe PCC as a general cloud API that every developer can freely call. Developers in the App Store Small Business Program with fewer than two million first-time App Store downloads can use Apple Foundation Models running on PCC and apply for access.

Eligible developers do not need to create an API key, server login or model-provider account. Apps call the model through the OS-integrated Foundation Models framework, with an interface aligned with the on-device model.

No cloud API cost, but usage quotas apply

Apple says eligible Small Business Program developers can use PCC without a cloud API inference charge. That does not mean unlimited usage: each person has a daily limit, and iCloud+ may provide higher limits.

Developers should not treat PCC as an unlimited backend model. Apps need clear behavior when a quota is exhausted, a model is unavailable or network conditions change.

What should developers handle?

Apple’s demonstration uses a unified Swift API for sessions, generation, Generable structured output and custom tools, with the PCC language model available when more capability is needed.

Apple recommends checking model availability and handling errors such as quotaLimitReached. Apps should provide graceful fallbacks, such as returning to the on-device model, reducing the task or asking the user to try later.

Why this matters

This update brings Apple’s private AI architecture to some third-party apps, but access remains limited by developer eligibility, downloads, daily quotas, supported devices and Apple platform rules. PCC is not a drop-in replacement for OpenAI or Google APIs; it is an OS-integrated server AI path with Apple-managed trust boundaries.

For official details, see Apple Private Cloud Compute developer page、Foundation Models PCC documentation，以及 WWDC26 developer video。