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*   [Get started](/v0.1/docs/get_started/)
    
    *   [Introduction](/v0.1/docs/get_started/introduction/)
    *   [Installation](/v0.1/docs/get_started/installation/)
    *   [Quickstart](/v0.1/docs/get_started/quickstart/)
*   [LangChain Expression Language](/v0.1/docs/expression_language/)
    
    *   [Get started](/v0.1/docs/expression_language/get_started/)
    *   [Why use LCEL?](/v0.1/docs/expression_language/why/)
    *   [Interface](/v0.1/docs/expression_language/interface/)
    *   [Streaming](/v0.1/docs/expression_language/streaming/)
    *   [How to](/v0.1/docs/expression_language/how_to/routing/)
        
    *   [Cookbook](/v0.1/docs/expression_language/cookbook/)
        
        *   [Prompt + LLM](/v0.1/docs/expression_language/cookbook/prompt_llm_parser/)
        *   [Multiple chains](/v0.1/docs/expression_language/cookbook/multiple_chains/)
        *   [Retrieval augmented generation (RAG)](/v0.1/docs/expression_language/cookbook/retrieval/)
        *   [Querying a SQL DB](/v0.1/docs/expression_language/cookbook/sql_db/)
        *   [Adding memory](/v0.1/docs/expression_language/cookbook/adding_memory/)
        *   [Using tools](/v0.1/docs/expression_language/cookbook/tools/)
        *   [Agents](/v0.1/docs/expression_language/cookbook/agents/)
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    *   [More](/v0.1/docs/modules/memory/)
        
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*   [](/v0.1/)
*   [LangChain Expression Language](/v0.1/docs/expression_language/)
*   [Cookbook](/v0.1/docs/expression_language/cookbook/)
*   Using tools

Using tools
===========

Tools are also runnables, and can therefore be used within a chain:

tip

See [this section for general instructions on installing integration packages](/v0.1/docs/get_started/installation/#installing-integration-packages).

*   npm
*   Yarn
*   pnpm

    npm install @langchain/anthropic

    yarn add @langchain/anthropic

    pnpm add @langchain/anthropic

    import { PromptTemplate } from "@langchain/core/prompts";import { StringOutputParser } from "@langchain/core/output_parsers";import { ChatAnthropic } from "@langchain/anthropic";import { SerpAPI } from "@langchain/community/tools/serpapi";const search = new SerpAPI();const prompt =  PromptTemplate.fromTemplate(`Turn the following user input into a search query for a search engine:{input}`);const model = new ChatAnthropic({});const chain = prompt.pipe(model).pipe(new StringOutputParser()).pipe(search);const result = await chain.invoke({  input: "Who is the current prime minister of Malaysia?",});console.log(result);/*  Anwar Ibrahim*/

#### API Reference:

*   [PromptTemplate](https://api.js.langchain.com/classes/langchain_core_prompts.PromptTemplate.html) from `@langchain/core/prompts`
*   [StringOutputParser](https://api.js.langchain.com/classes/langchain_core_output_parsers.StringOutputParser.html) from `@langchain/core/output_parsers`
*   [ChatAnthropic](https://api.js.langchain.com/classes/langchain_anthropic.ChatAnthropic.html) from `@langchain/anthropic`
*   [SerpAPI](https://api.js.langchain.com/classes/langchain_community_tools_serpapi.SerpAPI.html) from `@langchain/community/tools/serpapi`

* * *

#### Help us out by providing feedback on this documentation page:

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