A Node.js proxy that exposes Antigravity Cloud Code (Claude/Gemini) via an Anthropic-compatible API, enabling use with Claude Code CLI and OpenClaw. It supports multi-account Google auth and local Antigravity integration, with frequent releases and MIT licensing.
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What it is
A proxy server that exposes an Anthropic-compatible API backed by Antigravity's Cloud Code, letting you use Claude and Gemini models with Claude Code CLI and OpenClaw / ClawdBot.
How it works
- Receives requests in Anthropic Messages API format
- Uses OAuth tokens from added Google accounts (or Antigravity's local database)
- Transforms to Google Generative AI format with Cloud Code wrapping
- Sends to Antigravity's Cloud Code API
- Converts responses back to Anthropic format with full thinking/streaming support
Getting started
Prerequisites include Node.js 18 or later and Antigravity installed (for single-account mode) OR Google accounts for multi-account mode.
Installation
Option 1: npm (Recommended)
# Run directly with npx (no install needed)
npx antigravity-claude-proxy@latest start
# Or install globally
npm install -g antigravity-claude-proxy@latest
antigravity-claude-proxy start
Option 2: Clone Repository
git clone https://github.com/badri-s2001/antigravity-claude-proxy.git
cd antigravity-claude-proxy
npm install
npm start
Quick Start
Start the proxy and access at http://localhost:8080 by default.
Start commands
# If installed globally
acc start
# or: antigravity-claude-proxy start
# If using npx
npx antigravity-claude-proxy@latest start
# If cloned locally
npm start
Link Account(s)
Methods: Web Dashboard, CLI, Automatic with Antigravity app.
Verify
curl http://localhost:8080/health
Recent releases
- v2.8.5 (2026-05-23): Auto-detect X-Client-Version from local Antigravity app (product.json), configurable via ANTIGRAVITY_CLIENT_VERSION / ANTIGRAVITY_CLIENT_VERSION_FALLBACK env
- v2.8.4 (2026-05-14): Fixed Gemini 1M context preset model naming
- v2.8.3 (2026-05-01): FallBack Antigravity version overridable via FALLBACK_ANTIGRAVITY_VERSION
- v2.8.2 (2026-03-21): Bump Antigravity version to 1.20.6
- v2.8.1 (2026-03-07): Fix: drop untrusted thinking signatures for Claude resume turns; Update Claude Sonnet model refs
Traction
3882 stars, 533 forks, 21 open issues
Behind the repo
Not provided in the README excerpts
Caveats
MIT license. Terms of Service warning: Google ToS violation risk noted in README. Requires Node.js 18+, Antigravity or Google accounts for multi-account use.