Simon Willison’s Weblog

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22nd February 2026

Research WebMCP + Chrome DevTools Protocol Demo — WebMCP is a proposed browser API that enables web applications to expose structured, callable tools for AI agents, reducing the need for unreliable UI automation. This project demonstrates how to register and interact with WebMCP tools using a Python client over the Chrome DevTools Protocol (CDP), providing a bridge to discover and call these tools programmatically.

This is a beat by Simon Willison, posted on 22nd February 2026.

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