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---
title: "Preview20250311WebSearchServerTool"
---
Web search preview tool configuration (2025-03-11 version)
## Fields
| Field | Type | Required | Description | Example |
| -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `engine` | [Optional[components.WebSearchEngineEnum]](../components/websearchengineenum.mdx) | :heavy_minus_sign: | Which search engine to use. "auto" (default) uses native if the provider supports it, otherwise Exa. "native" forces the provider's built-in search. "exa" forces the Exa search API. "firecrawl" uses Firecrawl (requires BYOK). "parallel" uses the Parallel search API. "perplexity" uses the Perplexity Search API (raw ranked results). | auto |
| `filters` | [OptionalNullable[components.WebSearchDomainFilter]](../components/websearchdomainfilter.mdx) | :heavy_minus_sign: | N/A | \{<br/>"allowed_domains": [<br/>"example.com"<br/>],<br/>"excluded_domains": [<br/>"spam.com"<br/>]<br/>} |
| `max_results` | *Optional[int]* | :heavy_minus_sign: | Maximum number of search results to return per search call. Defaults to 5. Applies to Exa, Firecrawl, Parallel, and Perplexity engines; ignored with native provider search. Perplexity supports a maximum of 20; values above 20 are clamped. | 5 |
| `search_context_size` | [Optional[components.SearchContextSizeEnum]](../components/searchcontextsizeenum.mdx) | :heavy_minus_sign: | Size of the search context for web search tools | medium |
| `type` | [components.Preview20250311WebSearchServerToolType](../components/preview20250311websearchservertooltype.mdx) | :heavy_check_mark: | N/A | |
| `user_location` | [OptionalNullable[components.PreviewWebSearchUserLocation]](../components/previewwebsearchuserlocation.mdx) | :heavy_minus_sign: | N/A | \{<br/>"city": "San Francisco",<br/>"country": "USA",<br/>"region": "California",<br/>"timezone": "America/Los_Angeles",<br/>"type": "approximate"<br/>} |