Google Launches WebMCP Origin Trial in Chrome 149: Direct Tool Interface for Browser Agents

Google and Microsoft have launched a public origin trial for WebMCP (Web Model Context Protocol) in Chrome 149, enabling websites to explicitly register structured tools—JavaScript functions and HTML form interfaces—that AI agents can discover and invoke directly without DOM scraping or interface guessing. Announced at Google I/O 2026 in May, the initiative shifts how agents interact with websites from visual interpretation and brittle element selection to typed, machine-readable function calls with JSON Schema definitions.