WebMCPStructured browser tools for AI agents

A proposed web standard to build and expose tools that let AI agents interact with your page reliably, as a progressive enhancement.

Declarative API

Turn standard HTML forms into agent tools with tool-* annotations, no extra JavaScript required.

How the in-browser Web Model Context Protocol differs from server-side MCP, and when to use each.

Guard against prompt injection with annotation hints, careful origin exposure, and character budgets.

Real scenarios where WebMCP improves agent accuracy and task completion on the web.

Test WebMCP tools in isolation and end-to-end, with deterministic and probabilistic checks.