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Web Search Tool (web_search)

This document describes the web_search tool for performing web searches using multiple providers.

Description

Use web_search to perform a web search and get information from the internet. The tool supports multiple search providers and returns a concise answer with source citations when available.

Supported Providers

  1. DashScope (Official, Free) - Automatically available for Qwen OAuth users (200 requests/minute, 2000 requests/day)
  2. Tavily - High-quality search API with built-in answer generation
  3. Google Custom Search - Google’s Custom Search JSON API

Arguments

web_search takes two arguments:

  • query (string, required): The search query
  • provider (string, optional): Specific provider to use (“dashscope”, “tavily”, “google”)
    • If not specified, uses the default provider from configuration

Configuration

Add to your settings.json:

{
  "webSearch": {
    "provider": [
      { "type": "dashscope" },
      { "type": "tavily", "apiKey": "tvly-xxxxx" },
      {
        "type": "google",
        "apiKey": "your-google-api-key",
        "searchEngineId": "your-search-engine-id"
      }
    ],
    "default": "dashscope"
  }
}

Notes:

  • DashScope doesn’t require an API key (official, free service)
  • Qwen OAuth users: DashScope is automatically added to your provider list, even if not explicitly configured
  • Configure additional providers (Tavily, Google) if you want to use them alongside DashScope
  • Set default to specify which provider to use by default (if not set, priority order: Tavily > Google > DashScope)

Method 2: Environment Variables

Set environment variables in your shell or .env file:

# Tavily
export TAVILY_API_KEY="tvly-xxxxx"
 
# Google
export GOOGLE_API_KEY="your-api-key"
export GOOGLE_SEARCH_ENGINE_ID="your-engine-id"

Method 3: Command Line Arguments

Pass API keys when running Qwen Code:

# Tavily
qwen --tavily-api-key tvly-xxxxx
 
# Google
qwen --google-api-key your-key --google-search-engine-id your-id
 
# Specify default provider
qwen --web-search-default tavily

Backward Compatibility (Deprecated)

⚠️ DEPRECATED: The legacy tavilyApiKey configuration is still supported for backward compatibility but is deprecated:

{
  "advanced": {
    "tavilyApiKey": "tvly-xxxxx" // ⚠️ Deprecated
  }
}

Important: This configuration is deprecated and will be removed in a future version. Please migrate to the new webSearch configuration format shown above. The old configuration will automatically configure Tavily as a provider, but we strongly recommend updating your configuration.

If you want to disable the web search functionality, you can exclude the web_search tool in your settings.json:

{
  "tools": {
    "exclude": ["web_search"]
  }
}

Note: This setting requires a restart of Qwen Code to take effect. Once disabled, the web_search tool will not be available to the model, even if web search providers are configured.

Usage Examples

Basic search (using default provider)

web_search(query="latest advancements in AI")

Search with specific provider

web_search(query="latest advancements in AI", provider="tavily")

Real-world examples

web_search(query="weather in San Francisco today")
web_search(query="latest Node.js LTS version", provider="google")
web_search(query="best practices for React 19", provider="dashscope")

Provider Details

DashScope (Official)

  • Cost: Free
  • Authentication: Automatically available when using Qwen OAuth authentication
  • Configuration: No API key required, automatically added to provider list for Qwen OAuth users
  • Quota: 200 requests/minute, 2000 requests/day
  • Best for: General queries, always available as fallback for Qwen OAuth users
  • Auto-registration: If you’re using Qwen OAuth, DashScope is automatically added to your provider list even if you don’t configure it explicitly

Tavily

  • Cost: Requires API key (paid service with free tier)
  • Sign up: https://tavily.com 
  • Features: High-quality results with AI-generated answers
  • Best for: Research, comprehensive answers with citations
  • Cost: Free tier available (100 queries/day)
  • Setup:
    1. Enable Custom Search API in Google Cloud Console
    2. Create a Custom Search Engine at https://programmablesearchengine.google.com 
  • Features: Google’s search quality
  • Best for: Specific, factual queries

Important Notes

  • Response format: Returns a concise answer with numbered source citations
  • Citations: Source links are appended as a numbered list: [1], [2], etc.
  • Multiple providers: If one provider fails, manually specify another using the provider parameter
  • DashScope availability: Automatically available for Qwen OAuth users, no configuration needed
  • Default provider selection: The system automatically selects a default provider based on availability:
    1. Your explicit default configuration (highest priority)
    2. CLI argument --web-search-default
    3. First available provider by priority: Tavily > Google > DashScope

Troubleshooting

Tool not available?

  • For Qwen OAuth users: The tool is automatically registered with DashScope provider, no configuration needed
  • For other authentication types: Ensure at least one provider (Tavily or Google) is configured
  • For Tavily/Google: Verify your API keys are correct

Provider-specific errors?

  • Use the provider parameter to try a different search provider
  • Check your API quotas and rate limits
  • Verify API keys are properly set in configuration

Need help?

  • Check your configuration: Run qwen and use the settings dialog
  • View your current settings in ~/.qwen-code/settings.json (macOS/Linux) or %USERPROFILE%\.qwen-code\settings.json (Windows)
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