🤖 Qwen Code OAuth Plugin for OpenCode

Authenticate OpenCode CLI with your qwen.ai account. This plugin enables you to use Qwen models (Coder, Max, Plus and more) with 2,000 free requests per day - no API key or credit card required!

🇧🇷 Leia em Português

✨ Features

• 🔐 OAuth Device Flow - Secure browser-based authentication (RFC 8628)
• ⚡ Automatic Polling - No need to press Enter after authorizing
• 🆓 2,000 req/day free - Generous free tier with no credit card
• 🧠 1M context window - Models with 1 million token context
• 🔄 Auto-refresh - Tokens renewed automatically before expiration
• 🔗 qwen-code compatible - Reuses credentials from ~/.qwen/oauth_creds.json

📋 Prerequisites

• OpenCode CLI installed
• A qwen.ai account (free to create)

🚀 Installation

1. Install the plugin

cd ~/.opencode && npm install opencode-qwencode-auth

2. Enable the plugin

Edit ~/.opencode/opencode.jsonc:

{
  "plugin": ["opencode-qwencode-auth"]
}

🔑 Usage

1. Login

opencode auth login

2. Select Provider

Choose "Other" and type qwen-code

3. Authenticate

Select "Qwen Code (qwen.ai OAuth)"

• A browser window will open for you to authorize
• The plugin automatically detects when you complete authorization
• No need to copy/paste codes or press Enter!

Tip

In the OpenCode TUI (graphical interface), the Qwen Code provider appears automatically in the provider list.

🎯 Available Models

Coding Models

Model	Context	Max Output	Best For
qwen3-coder-plus	1M tokens	64K tokens	Complex coding tasks
qwen3-coder-flash	1M tokens	64K tokens	Fast coding responses

General Purpose Models

Model	Context	Max Output	Reasoning	Best For
qwen3-max	256K tokens	64K tokens	No	Flagship model, complex reasoning and tool use
qwen-plus-latest	128K tokens	16K tokens	Yes	Balanced quality-speed with thinking mode
qwen3-235b-a22b	128K tokens	32K tokens	Yes	Largest open-weight MoE with thinking mode
qwen-flash	1M tokens	8K tokens	No	Ultra-fast, low-cost simple tasks

Using a specific model

opencode --provider qwen-code --model qwen3-coder-plus
opencode --provider qwen-code --model qwen3-max
opencode --provider qwen-code --model qwen-plus-latest

⚙️ How It Works

┌─────────────────┐     ┌──────────────────┐     ┌─────────────────┐
│   OpenCode CLI  │────▶│  qwen.ai OAuth   │────▶│  Qwen Models    │
│                 │◀────│  (Device Flow)   │◀────│  API            │
└─────────────────┘     └──────────────────┘     └─────────────────┘

1. Device Flow (RFC 8628): Opens your browser to chat.qwen.ai for authentication
2. Automatic Polling: Detects authorization completion automatically
3. Token Storage: Saves credentials to ~/.qwen/oauth_creds.json
4. Auto-refresh: Renews tokens 30 seconds before expiration

📊 Usage Limits

Plan	Rate Limit	Daily Limit
Free (OAuth)	60 req/min	2,000 req/day

Note

Limits reset at midnight UTC. For higher limits, consider using an API key from DashScope.

🔧 Troubleshooting

Token expired

The plugin automatically renews tokens. If issues persist:

# Remove old credentials
rm ~/.qwen/oauth_creds.json

# Re-authenticate
opencode auth login

Provider not showing in auth login

The qwen-code provider is added via plugin. In the opencode auth login command:

1. Select "Other"
2. Type qwen-code

Rate limit exceeded (429 errors)

• Wait until midnight UTC for quota reset
• Try using qwen3-coder-flash for faster, lighter requests
• Consider DashScope API for higher limits

🛠️ Development

# Clone the repository
git clone https://github.com/gustavodiasdev/opencode-qwencode-auth.git
cd opencode-qwencode-auth

# Install dependencies
bun install

# Type check
bun run typecheck

Local testing

Edit ~/.opencode/package.json:

{
  "dependencies": {
    "opencode-qwencode-auth": "file:///absolute/path/to/opencode-qwencode-auth"
  }
}

Then reinstall:

cd ~/.opencode && npm install

📁 Project Structure

src/
├── constants.ts        # OAuth endpoints, models config
├── types.ts            # TypeScript interfaces
├── index.ts            # Main plugin entry point
├── qwen/
│   └── oauth.ts        # OAuth Device Flow + PKCE
└── plugin/
    ├── auth.ts         # Credentials management
    └── utils.ts        # Helper utilities

🔗 Related Projects

• qwen-code - Official Qwen coding CLI
• OpenCode - AI-powered CLI for development
• opencode-gemini-auth - Similar plugin for Google Gemini

📄 License

MIT

---

Made with ❤️ for the OpenCode community