The Antigravity Link Extension by Cafetechne is a free MCP server tool built with JavaScript/Node.js, distributed as a VS Code extension. It serves as a mobile companion for Google's Antigravity IDE, connecting by discovering targets via the Chrome DevTools Protocol. This extension enables users to integrate AI assistants, agents, and external tools, expanding the IDE's capabilities. It supports various LLM workflows and OpenAPI-capable agent stacks, providing a versatile platform for automation and remote interaction, enhancing productivity for developers and AI enthusiasts alike.

What does Antigravity Link Extension connect to?

The Antigravity Link Extension functions as an MCP server tool and a mobile companion for Google's Antigravity IDE. It establishes connections by discovering targets through the Chrome DevTools Protocol (CDP). Distributed as a VS Code extension, it can be installed from the Antigravity extensions marketplace or directly from Open VSX. This tool extends the core functionality of the Antigravity IDE, linking it to various external systems and mobile devices.

Core features and tools

The extension exposes a local HTTP API and an MCP server, providing callable tools for automation. Specific tools include: /ping for health checks, /snapshot for the current chat surface, /windows to list active Antigravity windows, /click for UI element interaction, and /stop to halt AI generation. Additionally, it offers /upload for file transfers, /task, /walkthrough, and /plan to read document types, and a get_snapshot tool. The MCP server supports stdio and Streamable HTTP.

Who is it for?

Antigravity Link Extension targets users of Google's Antigravity IDE who seek mobile control, automation, or integration with AI agents and LLMs. It also serves developers creating custom agent loops, orchestration, or remote mobile-assisted workflows. Compatible AI clients include AI assistants, agents, external tools, LLM workflows, and OpenClaw. This tool empowers a diverse audience to enhance their Antigravity IDE experience. Skip this if you do not use Google's Antigravity IDE.

How to get started

The server authenticates using an API key passed as an environment variable. The server reads AG_BRIDGE_TOKEN and AUTH_TOKEN from process.env, and it supports HTTP or HTTPS transport protocols.

Use cases

• Mobile mirroring and interaction, allowing users to monitor AI generation, redirect it, upload files, or read output from a phone.
• AI agent automation, enabling AI assistants to directly drive Antigravity sessions by reading live snapshot states, sending prompts, stopping generation, and switching active IDE instances.
• External tool integration, facilitating automation through its local HTTP API.

Antigravity Link Extension by Cafetechne provides essential connectivity for Google's Antigravity IDE, bridging it with mobile devices and AI agents. It unlocks automation possibilities and extends interactive control, making the IDE more adaptable for advanced workflows. Its local server and callable tools offer a solid foundation for integration. Start by using its get_snapshot tool to retrieve the current chat surface state.