@langchain/anthropic/dist/tools/webFetch.js

Anthropic integrations for LangChain.js

//#region src/tools/webFetch.ts
/**
* Creates a web fetch tool that allows Claude to retrieve full content from specified
* web pages and PDF documents. Claude can only fetch URLs that have been explicitly
* provided by the user or that come from previous web search or web fetch results.
*
* @warning Enabling the web fetch tool in environments where Claude processes untrusted
* input alongside sensitive data poses data exfiltration risks. We recommend only using
* this tool in trusted environments or when handling non-sensitive data.
*
* @see {@link https://docs.anthropic.com/en/docs/build-with-claude/tool-use/web-fetch-tool | Anthropic Web Fetch Documentation}
* @param options - Configuration options for the web fetch tool
* @returns A web fetch tool definition to be passed to the Anthropic API
*
* @example
* ```typescript
* import { ChatAnthropic, tools } from "@langchain/anthropic";
*
* const model = new ChatAnthropic({
*   model: "claude-sonnet-4-5-20250929",
* });
*
* // Basic usage - fetch content from a URL
* const response = await model.invoke(
*   "Please analyze the content at https://example.com/article",
*   { tools: [tools.webFetch_20250910()] }
* );
*
* // With options
* const responseWithOptions = await model.invoke(
*   "Summarize this research paper: https://arxiv.org/abs/2024.12345",
*   {
*     tools: [tools.webFetch_20250910({
*       maxUses: 5,
*       allowedDomains: ["arxiv.org", "example.com"],
*       citations: { enabled: true },
*       maxContentTokens: 50000,
*     })],
*   }
* );
*
* // Combined with web search for comprehensive information gathering
* const combinedResponse = await model.invoke(
*   "Find recent articles about quantum computing and analyze the most relevant one",
*   {
*     tools: [
*       tools.webSearch_20250305({ maxUses: 3 }),
*       tools.webFetch_20250910({ maxUses: 5, citations: { enabled: true } }),
*     ],
*   }
* );
* ```
*/
function webFetch_20250910(options) {
	return {
		type: "web_fetch_20250910",
		name: "web_fetch",
		max_uses: options?.maxUses,
		allowed_domains: options?.allowedDomains,
		blocked_domains: options?.blockedDomains,
		cache_control: options?.cacheControl,
		citations: options?.citations,
		max_content_tokens: options?.maxContentTokens
	};
}

//#endregion
export { webFetch_20250910 };
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