Antigravity Bridge

Turn Antigravity (free AI desktop app) into a REST API via Chrome DevTools Protocol (CDP).

Usage

Mode 1: Bridge API (Q&A)

# CLI
ag "Your question" [model]

# HTTP
curl -s -X POST http://localhost:19999/chat \
  -H 'Content-Type: application/json' \
  -d '{"prompt":"Your question","model":"Claude Opus 4.6 (Thinking)"}'

Mode 2: IDE Agent (project tasks)

bash scripts/agy_invoke.sh "Task description" [--model opus]

Parameters

• model: opus (Claude Opus 4.6), gemini (Gemini 3.1 Pro), sonnet (Claude Sonnet 4.6), flash (Gemini 3 Flash), gpt (GPT-OSS 120B)

Examples

# Health check
curl -s http://localhost:19999/health

# Call Claude Opus
ag "Write a bash script" opus

# IDE agent task
bash scripts/agy_invoke.sh "Fix bug in common.sh" --model sonnet

Requirements

• Mac with Antigravity installed and running
• Antigravity started with --remote-debugging-port=9229
• Bridge mode: run bridge.py
• IDE mode: Node.js with ws package

Configuration

• Bridge port: --port (default: 19999)
• CDP port: --cdp-port (default: 9229)
• Host: localhost (or set AG_BRIDGE_HOST env var)