Originally published on AI Tech Connect.
What WebMCP actually is On 19-20 May 2026, Google used the I/O developer keynote to introduce WebMCP — a proposed open web standard that lets a website declare its own actions as structured tools a browser-based AI agent can call. It is the headline plumbing announcement of an I/O cycle dominated by agents: Antigravity 2.0, Gemini Spark and a new stable Android CLI for AI agents all landed at the same event. The pitch is simple. Today, when an agent like Spark or Antigravity opens your web app, it has to reverse-engineer what your site can do by scraping the DOM, guessing at CSS selectors and clicking through brittle visual affordances. WebMCP flips that around: the page itself tells the agent, in machine-readable form, which JavaScript functions and which HTML forms are real tools, what…
