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Extension points APIs

Deprecated

Product subscription app extensions won't be supported as of February 9, 2026. You should migrate existing product subscription app extensions to purchase options extensions.

Learn about the APIs provided to extension points:

  • LayoutApi: Adjust your content based on the user's screen size.
  • LocaleApi: Access a merchant’s current locale to internationalize your extension content.
  • SessionTokenApi: Get a fresh session token for communication with your app's backend service.
  • ToastApi: Provide quick, at-a-glance feedback on the outcome of an action.
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