Technology

WebMCP

Standardize website functionality exposure: WebMCP is the JavaScript API that lets web developers define client-side "tools" for direct, reliable invocation by AI agents and LLMs.

WebMCP is a W3C-incubated standard (an initiative by Microsoft and Google) that provides a JavaScript API, specifically `navigator.modelContext`, for web developers. It enables websites to function as Model Context Protocol (MCP) servers, exposing client-side functionality as structured "tools" for AI agents and browser assistants to invoke directly. This approach replaces unreliable UI actuation with deterministic function calls, facilitating secure, human-in-the-loop workflows where the user maintains control and the agent augments the experience. Developers use it to integrate existing frontend logic, simplifying authentication and state management for agent-based interactions.