PowerSchool uses and Client IDs together. When you register an app on the developer portal, you aren't just getting credentials; you are defining which specific districts (clients) are allowed to install your app.
There isn't a widely documented "Page SDK" as a single, standalone product. However, working with PowerSchool pages involves using several components together: powerschool developer site
Integrations operate on the principle of least privilege. When defining a plugin, developers must explicitly state which areas of the database the application needs to access (e.g., Read-Only access to student rosters, or Read/Write access to attendance). District administrators see these requested scopes during installation and must explicitly approve them. Getting Started: A Step-by-Step Integration Workflow PowerSchool uses and Client IDs together
All data in transit must utilize TLS 1.3 or higher. Data stored at rest in your system must be encrypted using AES-256 standard. Read-Only access to student rosters
The modern standard for PowerSchool integration relies on RESTful web services.