Qwen Auth

Authenticate OpenCode CLI with your qwen.ai account using OAuth Device Flow. This plugin enables you to use Qwen AI models (coder-model and vision-model) with free daily quota - no API key or credit card required.

中文文档

Features

• OAuth Device Flow (RFC 8628) - Secure browser-based authentication
• PKCE support (RFC 7636) - Enhanced security for public clients
• Automatic polling - Detects authorization completion without manual input
• Auto-refresh tokens - Renewed automatically before expiration
• Compatible with qwen-code - Reuses credentials from ~/.qwen/oauth_creds.json
• Free tier - 2,000 requests per day via OAuth

Prerequisites

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

Installation

1. Install the plugin

cd ~/.opencode && npm install @melodyoftears/opencode-qwen-auth

2. Enable the plugin

Edit ~/.opencode/opencode.jsonc:

{
  "plugin": ["@melodyoftears/opencode-qwen-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 opens automatically for authorization
• The plugin polls and detects when you complete authorization
• No need to copy/paste codes or press Enter

Available Models

Model	ID	Input	Output	Context	Max Output
Qwen Coder (Qwen 3.5 Plus)	coder-model	text	text	1M tokens	65,536 tokens
Qwen VL Plus (Vision)	vision-model	text, image	text	128K tokens	8,192 tokens

Using a specific model

opencode --provider qwen-code --model coder-model
opencode --provider qwen-code --model vision-model

How It Works

1. Device Flow: 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

Limits reset at midnight UTC.

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
• Switch to another Qwen account and login again if quota is exhausted

Development

# Clone the repository
git clone https://github.com/1579364808/opencode-qwen-auth.git
cd opencode-qwencode-auth

# Install dependencies
bun install

# Build
bun run build

# Type check
bun run typecheck

Local testing

Edit ~/.opencode/package.json:

{
  "dependencies": {
    "@melodyoftears/opencode-qwen-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
├── cli.ts              # CLI helper for manual auth
├── qwen/
│   └── oauth.ts        # OAuth Device Flow + PKCE
├── plugin/
│   ├── auth.ts         # Credentials management
│   └── utils.ts        # Helper utilities
└── errors.ts           # Error handling

Related Projects

• qwen-code - Official Qwen coding CLI
• OpenCode - AI-powered CLI for development

Links

• npm package
• GitHub repository

Support

If this project helps you, you can buy me a coffee:

License

MIT