Manifest is an API tool that converts any URL into a structured JSON map of every button, form, and input field an AI agent can interact with on a webpage. It reads a page's accessibility tree and cross-references it against the DOM to capture required fields, input types, placeholders, and disabled states. This eliminates the need for hand-written CSS selectors or screenshot-based guessing by giving agents a clean, reasoned description of available actions. Manifest is designed to serve as the action layer between AI agents and live web pages, surviving UI redesigns without breaking.