How to configure page level information using AEM APIs?
You can use the AEM API to get information about AEM resources such as pages. In your code, you can use the following code.
PageManager pageManager = resourceResolver.adaptTo(PageManager.class);
Page listPage = pageManager.getPage("/etc/acs-commons/lists/targets");
GenericList list = listPage.adaptTo(GenericList.class);
String value = list.lookup(key);
This code gives you the value. For more information about using Sling APIs, see Using Sling APIs to retrieve content from the Adobe Experience Manager Repository.