A local proxy, ZeroGravity, enables developers and power users to access frontier AI models like Gemini 3 Pro and Claude Opus 4.6 through a unified local endpoint. It bypasses the need for API keys, billing, or waitlists by making requests appear as legitimate Antigravity traffic, thus avoiding detection. This facilitates seamless integration with existing AI coding tools.

How It Works

ZeroGravity acts as an intermediary, forwarding requests to backend AI services while meticulously altering them to mimic genuine user interactions within Google's Antigravity platform. This sophisticated approach ensures requests are indistinguishable from normal traffic, preventing flagging by Google's backend systems. It supports standard OpenAI Chat Completions and Responses APIs, alongside the Anthropic Messages API, offering broad compatibility.

Quick Start & Requirements

Deployment is exclusively supported via Docker, initiated with zg docker-init && docker compose up -d. A prerequisite is an Antigravity account from which a refresh token must be extracted using the zg extract command. The Docker image bundles all necessary backend components, negating the need for a host-side Antigravity installation. Official documentation is available for Docker setup, API reference, and the zg CLI.

Highlighted Details

ZeroGravity integrates with numerous AI coding tools, including Claude Code, Cursor, Cline, aider, and OpenCode. It supports models such as Claude Opus 4.6 and Gemini 3 Pro, with experimental Gemini 3.1 Pro support. The proxy also facilitates image generation, serving created images directly via a local URL.

Maintenance & Community

While the project's source code has transitioned to a private repository for long-term sustainability, binaries, Docker images, and releases continue to be published. The project welcomes issues and pull requests, with read-only source access available upon request via GitHub Discussions or Telegram.

Licensing & Compatibility

Licensed under MIT, ZeroGravity generally permits commercial use and integration. However, users must ensure compliance with the terms of service of the underlying Antigravity/Google services.

Limitations & Caveats

Docker is the sole supported deployment method, with native installations deprecated. The private nature of the source code may limit deep code inspection or direct community contributions to the core codebase. Functionality is contingent upon the continued availability and API stability of Google's Antigravity services.