Claude Code - WebSearch Across All Providers

Enable Claude Code's web search tool to work with any provider (Bedrock, Azure, Vertex, etc.). LiteLLM automatically intercepts web search requests and executes them server-side.

Proxy Configuration

Add WebSearch interception to your litellm_config.yaml:

litellm_config.yaml

model_list:
  - model_name: bedrock-sonnet
    litellm_params:
      model: bedrock/us.anthropic.claude-sonnet-4-5-20250929-v1:0
      aws_region_name: us-east-1

# Enable WebSearch interception for providers
litellm_settings:
  callbacks:
    - websearch_interception:
        enabled_providers:
          - bedrock
          - azure
          - vertex_ai
        search_tool_name: perplexity-search  # Optional: specific search tool

# Configure search provider
search_tools:
  - search_tool_name: perplexity-search
    litellm_params:
      search_provider: perplexity
      api_key: os.environ/PERPLEXITY_API_KEY

Quick Start

1. Configure LiteLLM Proxy

Create config.yaml:

config.yaml

model_list:
  - model_name: bedrock-sonnet
    litellm_params:
      model: bedrock/us.anthropic.claude-sonnet-4-5-20250929-v1:0
      aws_region_name: us-east-1

litellm_settings:
  callbacks:
    - websearch_interception:
        enabled_providers: [bedrock]

search_tools:
  - search_tool_name: perplexity-search
    litellm_params:
      search_provider: perplexity
      api_key: os.environ/PERPLEXITY_API_KEY

2. Start Proxy

Start LiteLLM Proxy

export PERPLEXITY_API_KEY=your-key
litellm --config config.yaml

3. Use with Claude Code

Configure Claude Code

export ANTHROPIC_BASE_URL=http://localhost:4000
export ANTHROPIC_API_KEY=sk-1234
claude

Now use web search in Claude Code - it works with any provider!

How It Works

When Claude Code sends a web search request, LiteLLM:

1. Intercepts the native web_search tool
2. Converts it to LiteLLM's standard format
3. Executes the search via Perplexity/Tavily
4. Returns the final answer to Claude Code

Result: One API call from Claude Code → Complete answer with search results

Supported Providers

Provider	Native Web Search	With LiteLLM
Anthropic	✅ Yes	✅ Yes
Bedrock	❌ No	✅ Yes
Azure	❌ No	✅ Yes
Vertex AI	❌ No	✅ Yes
Other Providers	❌ No	✅ Yes

Search Providers

Configure which search provider to use. LiteLLM supports multiple search providers:

Provider	search_provider Value	Environment Variable
Perplexity AI	perplexity	PERPLEXITYAI_API_KEY
Tavily	tavily	TAVILY_API_KEY
Exa AI	exa_ai	EXA_API_KEY
Parallel AI	parallel_ai	PARALLEL_AI_API_KEY
Google PSE	google_pse	GOOGLE_PSE_API_KEY, GOOGLE_PSE_ENGINE_ID
DataForSEO	dataforseo	DATAFORSEO_LOGIN, DATAFORSEO_PASSWORD
Firecrawl	firecrawl	FIRECRAWL_API_KEY
SearXNG	searxng	SEARXNG_API_BASE (required)
Linkup	linkup	LINKUP_API_KEY

See all supported search providers for detailed setup instructions and provider-specific parameters.

Configuration Options

WebSearch Interception Parameters

Parameter	Type	Required	Description	Example
enabled_providers	List[String]	Yes	List of providers to enable web search interception for	[bedrock, azure, vertex_ai]
search_tool_name	String	No	Specific search tool from search_tools config. If not set, uses first available search tool.	perplexity-search

Supported Provider Values

Use these values in enabled_providers:

Provider	Value	Description
AWS Bedrock	bedrock	Amazon Bedrock Claude models
Azure OpenAI	azure	Azure-hosted models
Google Vertex AI	vertex_ai	Google Cloud Vertex AI
Any Other	Provider name	Any LiteLLM-supported provider

Complete Configuration Example

Complete config.yaml

model_list:
  - model_name: bedrock-sonnet
    litellm_params:
      model: bedrock/us.anthropic.claude-sonnet-4-5-20250929-v1:0
      aws_region_name: us-east-1

  - model_name: azure-gpt4
    litellm_params:
      model: azure/gpt-4
      api_base: https://my-azure.openai.azure.com
      api_key: os.environ/AZURE_API_KEY

litellm_settings:
  callbacks:
    - websearch_interception:
        enabled_providers:
          - bedrock        # Enable for AWS Bedrock
          - azure          # Enable for Azure OpenAI
          - vertex_ai      # Enable for Google Vertex
        search_tool_name: perplexity-search  # Optional: use specific search tool

# Configure search tools
search_tools:
  - search_tool_name: perplexity-search
    litellm_params:
      search_provider: perplexity
      api_key: os.environ/PERPLEXITY_API_KEY

  - search_tool_name: tavily-search
    litellm_params:
      search_provider: tavily
      api_key: os.environ/TAVILY_API_KEY

How search tool selection works:

• If search_tool_name is specified → Uses that specific search tool
• If search_tool_name is not specified → Uses first search tool in search_tools list
• In example above: Without search_tool_name, would use perplexity-search (first in list)

Related

• Claude Code Quickstart
• Claude Code Cost Tracking
• Using Non-Anthropic Models