Extremely Lightweight Antigravity-Claude-Proxy

A blazing-fast Rust proxy that translates Anthropic's Claude API to Google's Cloud Code API. Use Claude and Gemini models through a single Anthropic-compatible endpoint.

More screenshots

Why AGCP?

• Lightweight - Single binary, minimal dependencies, ~3MB compiled
• Fast - Written in Rust with async I/O, handles concurrent requests efficiently
• Simple - Just agcp login and you're ready, no config files needed
• Powerful - Multi-account support, response caching, smart load balancing

Features

• Anthropic API Compatible - Works with Claude Code, OpenCode, Cursor, Cline, and other Anthropic API clients
• Multiple Models - Access Claude (Opus, Sonnet) and Gemini (Flash, Pro) through a single endpoint
• Multi-Account Support - Rotate between multiple Google accounts with smart load balancing
• Response Caching - Cache non-streaming responses to reduce quota usage
• Interactive TUI - Beautiful terminal UI for monitoring and configuration
• Background Daemon - Runs quietly in the background

Quick Start

# Install from source
git clone https://github.com/skyline69/agcp
cd agcp
cargo build --release

# Login with Google OAuth
./target/release/agcp login

# Start the proxy (runs as background daemon)
./target/release/agcp

# Configure your AI tool to use http://127.0.0.1:8080

Installation

Homebrew (macOS/Linux)

brew tap skyline69/agcp
brew install agcp

APT (Debian/Ubuntu)

# Add the GPG key and repository
curl -fsSL https://dasguney.com/apt/public.key | sudo gpg --dearmor -o /usr/share/keyrings/agcp.gpg
echo "deb [signed-by=/usr/share/keyrings/agcp.gpg] https://dasguney.com/apt stable main" | sudo tee /etc/apt/sources.list.d/agcp.list

# Install
sudo apt update
sudo apt install agcp

DNF (Fedora/RHEL)

# Add the repository
sudo tee /etc/yum.repos.d/agcp.repo << 'EOF'
[agcp]
name=AGCP
baseurl=https://dasguney.com/rpm/packages
enabled=1
gpgcheck=1
gpgkey=https://dasguney.com/rpm/public.key
EOF

# Install
sudo dnf install agcp

AUR (Arch Linux)

# With an AUR helper (e.g. yay, paru)
yay -S agcp-bin

# Or manually
git clone https://aur.archlinux.org/agcp-bin.git
cd agcp-bin
makepkg -si

Nix

# Run directly
nix run github:skyline69/agcp

# Or install into profile
nix profile install github:skyline69/agcp

From Source

git clone https://github.com/skyline69/agcp
cd agcp
cargo build --release

# Optional: Install to PATH
cp target/release/agcp ~/.local/bin/

Shell Completions

# Bash
eval "$(agcp completions bash)"

# Zsh
eval "$(agcp completions zsh)"

# Fish
agcp completions fish > ~/.config/fish/completions/agcp.fish

Usage

Commands

Command	Description
agcp	Start the proxy server (daemon mode)
agcp login	Authenticate with Google OAuth
agcp setup	Configure AI tools to use AGCP
agcp tui	Launch interactive terminal UI
agcp status	Check if server is running
agcp stop	Stop the background server
agcp restart	Restart the background server
agcp logs	View server logs (follows by default)
agcp config	Show current configuration
agcp accounts	Manage multiple accounts
agcp doctor	Check configuration and connectivity
agcp quota	Show model quota usage
agcp stats	Show request statistics
agcp test	Verify setup works end-to-end

CLI Options

agcp [OPTIONS]

Options:
  -p, --port <PORT>    Port to listen on (default: 8080)
  --host <HOST>        Host to bind to (default: 127.0.0.1)
  --network            Listen on all interfaces (LAN access)
  -f, --foreground     Run in foreground instead of daemon mode
  -d, --debug          Enable debug logging
  --fallback           Enable model fallback on quota exhaustion
  -h, --help           Show help
  -V, --version        Show version

Interactive TUI

AGCP includes a terminal UI for monitoring and configuration (agcp tui):

Features:

• Overview - Real-time request rate, response times, account status
• Logs - Syntax-highlighted log viewer with scrolling
• Accounts - Manage and monitor account quota (search with /, sort with s)
• Config - Edit configuration interactively
• Mappings - Configure model name mappings with presets and glob rules
• Quota - Visual quota usage with donut charts

Model Aliases

For convenience, you can use these short aliases:

Alias	Model
opus	claude-opus-4-6-thinking
sonnet	claude-sonnet-4-5
sonnet-thinking	claude-sonnet-4-5-thinking
flash	gemini-3-flash
pro	gemini-3-pro-high
gpt-oss	gpt-oss-120b-medium

Supported Models

Claude Models

• claude-opus-4-6-thinking
• claude-opus-4-5-thinking
• claude-sonnet-4-5
• claude-sonnet-4-5-thinking

Gemini Models

• gemini-3-flash
• gemini-3-pro-high
• gemini-3-pro-low

Other Models

• gpt-oss-120b-medium

Configuration

AGCP uses a TOML configuration file at ~/.config/agcp/config.toml:

[server]
port = 8080
host = "127.0.0.1"
# api_key = "your-optional-api-key"
request_timeout_secs = 300       # Per-request timeout (default: 5 minutes)

[logging]
debug = false
log_requests = false

[accounts]
strategy = "hybrid"      # "sticky", "roundrobin", or "hybrid"
quota_threshold = 0.1    # Deprioritize accounts below 10% quota
fallback = false

[cache]
enabled = true
ttl_seconds = 300
max_entries = 100

[cloudcode]
timeout_secs = 120
max_retries = 5
max_concurrent_requests = 1      # Max parallel requests to Cloud Code API
min_request_interval_ms = 500    # Minimum delay between requests (ms)

Account Selection Strategies

• sticky - Use the same account until it hits quota limits
• roundrobin - Rotate through accounts evenly
• hybrid - Smart selection based on account health and quota (recommended)

Multi-Account Management

AGCP supports multiple Google accounts for higher throughput:

# Add accounts
agcp login                    # Add first account
agcp login                    # Add another account

# View accounts
agcp accounts                 # List all accounts

# Manage accounts
agcp accounts disable <id>    # Disable an account
agcp accounts enable <id>     # Re-enable an account
agcp accounts remove <id>     # Remove an account

API Endpoints

Endpoint	Description
POST /v1/messages	Anthropic Messages API (streaming and non-streaming)
GET /v1/models	List available models
GET /health	Health check
GET /stats	Server and cache statistics

Response Caching

AGCP caches non-streaming responses to reduce API quota usage:

• Identical requests return cached responses instantly
• Streaming and thinking model responses are not cached
• Use X-No-Cache: true header to bypass cache
• Cache headers: X-Cache: HIT, X-Cache: MISS, X-Cache: BYPASS

Configuring AI Tools

Claude Code

agcp setup

Select "Claude Code" from the interactive menu, or manually add to ~/.claude/settings.json:

{
  "apiBaseUrl": "http://127.0.0.1:8080"
}

Other Tools

Point any Anthropic API-compatible tool to http://127.0.0.1:8080/v1.

Troubleshooting

agcp doctor    # Run diagnostic checks
agcp status    # Quick status check
agcp logs      # View logs

Files

Path	Description
~/.config/agcp/config.toml	Configuration file
~/.config/agcp/accounts.json	Account credentials
~/.config/agcp/agcp.log	Server logs

License

MIT - See LICENSE for details.

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Made with Rust