WebMCP has crossed from a browser experiment into a usable agent integration: ChatGPT’s built-in browser now discovers site tools out of the box, while Chrome exposes the proposed standard through an origin trial. Builders can add structured actions to existing web apps, but the API and security model remain experimental.
WebKit’s Safari MCP server turns browser debugging into an agent-callable interface. It runs locally and makes no network calls itself, but captured page data is sent directly to the connected agent, so browser-session trust and model data handling become part of the development security model.
Agent Plugins 1.0 now has documented support across VS Code, Cursor, GitHub Copilot, ChatGPT/Codex, Kiro and several open-source agents. That makes the format materially more useful for cross-client distribution, but portable components remain limited to Agent Skills and MCP servers while permissions, hooks, commands and host UX stay client-specific.