WebMCP – JavaScript interface enabling AI agents to control web apps

Summary: WebMCP is a JavaScript interface that lets developers expose web app functions as structured tools accessible to AI agents, browser assistants, and assistive technologies. It supports collaborative workflows by maintaining shared context and user control within the web interface. Backed by Google and Microsoft, WebMCP is shipping in Chrome Canary with W3C support, marking its transition from proposal to production.

What it does

WebMCP exposes web application functionality as JavaScript functions with natural language descriptions and schemas, allowing AI agents to invoke them directly. It integrates existing app logic to enable collaboration between users and AI within the same interface.

Who it's for

Web developers building web apps that require AI agent interaction or assistive technology integration.

Why it matters

It standardizes communication between websites and AI agents, enabling seamless, structured control of web apps by intelligent assistants.