Methods, systems, and apparatus, for providing notifications based on third party data. In an aspect, a method includes receiving first instructions that cause a user device to render a resource that includes a first parameter value of a first parameter and display the resource and generating second instructions that cause the user device to display an action trigger prompt that is rendered with the resource and in an initial state, and wherein the action trigger prompt is rendered to augment the resource with additional content not provided by rendering of the resource according to the first instructions.