> For the complete documentation index, see [llms.txt](https://tailwindsdocs.innovativesol.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tailwindsdocs.innovativesol.com/readme/chatflows/langchain/tools.md).

# Tools

***

Tools are functions that agents can use to interact with the world. These tools can be generic utilities (e.g. search), other chains, or even other agents.

### Tool Nodes:

* [BraveSearch API](/readme/chatflows/langchain/tools/bravesearch-api.md)
* [Calculator](/readme/chatflows/langchain/tools/calculator.md)
* [Chain Tool](/readme/chatflows/langchain/tools/chain-tool.md)
* [Chatflow Tool](/readme/chatflows/langchain/tools/chatflow-tool.md)
* [Custom Tool](/readme/chatflows/langchain/tools/custom-tool.md)
* [Exa Search](/readme/chatflows/langchain/tools/exa-search.md)
* [Google Custom Search](/readme/chatflows/langchain/tools/google-custom-search.md)
* [OpenAPI Toolkit](/readme/chatflows/langchain/tools/openapi-toolkit.md)
* [Python Interpreter](/readme/chatflows/langchain/tools/python-interpreter.md)
* [Read File](/readme/chatflows/langchain/tools/read-file.md)
* [Request Get](/readme/chatflows/langchain/tools/request-get.md)
* [Request Post](/readme/chatflows/langchain/tools/request-post.md)
* [Retriever Tool](/readme/chatflows/langchain/tools/retriever-tool.md)
* [SearchApi](/readme/chatflows/langchain/tools/searchapi.md)
* [SearXNG](/readme/chatflows/langchain/tools/searxng.md)
* [Serp API](/readme/chatflows/langchain/tools/serp-api.md)
* [Serper](/readme/chatflows/langchain/tools/serper.md)
* [Web Browser](/readme/chatflows/langchain/tools/web-browser.md)
* [Write File](/readme/chatflows/langchain/tools/write-file.md)