The Page API provides read-only information about the page the editor bound your extension to, such as a site page extension's own page. The page is bound through the host context, so there's no page ID to pass in and no mutation surface.
To use the Page API, follow the setup instructions for the Editor API.
Note: The Page API resolves a page only when the calling app is bound to one, which happens for site page extensions. It's not available from a site widget or plugin's settings panel. Every method rejects there, even though the panel's own Widget API and Info API calls work normally in the same panel. There is currently no public API for getting the stable page ID of the page a widget instance is placed on.
Last updated: 25 August 2026