WebMCP demo shows external agents controlling embedded pages in the browser

thisiskp_ · x · 2026-09-03

Developer stephenhaney demonstrated WebMCP in action: a Paper page embedded in an iframe is controlled by an external agent that wraps it, all within the browser. WebMCP enables these embedded agent-in-page flows, which its proponents say unlock a wide range of user-agent collaboration use cases — a notable new interaction pattern for browser-based agent integration.

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