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Browser Run adds WebMCP to Kitesurf and moves to document.modelContext

Browser Run
View as MarkdownAgent setup

WebMCP now works in Kitesurf sessions as well as Lab sessions. Both backends use the document.modelContext API from the WebMCP Community Group draft ↗︎. Lab sessions no longer expose navigator.modelContextTesting.

To list and run page tools:

  • Chrome DevTools: Use the Application > WebMCP panel in the live view of a Lab session or in the Kitesurf playground ↗︎.
  • AI agents: Start Chrome DevTools MCP with the --category-experimental-webmcp flag to add the list_webmcp_tools and execute_webmcp_tool tools.
  • CDP clients: Use the WebMCP CDP domain.