The developer site is not limited to the legacy PowerSchool SIS. It encompasses documentation for the entire PowerSchool ecosystem, including:
Create a centralized, developer-focused portal for PowerSchool that provides comprehensive API documentation, SDKs, interactive testing, sample apps, and community resources to accelerate integrations and improve developer experience. powerschool developer site
While technically separate, the PowerSchool Community is linked heavily from the developer site. This is where you can find: The developer site is not limited to the