Harrison/wolfram alpha (#579)

Co-authored-by: Nicolas <nicolascamara29@gmail.com>

docs/ecosystem/wolfram_alpha.md

@@ -0,0 +1,34 @@
+# Wolfram Alpha Wrapper
+
+This page covers how to use the Wolfram Alpha API within LangChain.
+It is broken into two parts: installation and setup, and then references to specific Wolfram Alpha wrappers.
+
+## Installation and Setup
+- Install requirements with `pip install wolframalpha`
+- Go to wolfram alpha and sign up for a developer account [here](https://developer.wolframalpha.com/)
+- Create an app and get your APP ID
+- Set your APP ID as an environment variable `WOLFRAM_ALPHA_APPID`
+
+
+## Wrappers
+
+### Utility
+
+There exists a WolframAlphaAPIWrapper utility which wraps this API. To import this utility:
+
+```python
+from langchain.utilities.wolfram_alpha import WolframAlphaAPIWrapper
+```
+
+For a more detailed walkthrough of this wrapper, see [this notebook](../modules/utils/examples/wolfram_alpha.ipynb).
+
+### Tool
+
+You can also easily load this wrapper as a Tool (to use with an Agent).
+You can do this with:
+```python
+from langchain.agents import load_tools
+tools = load_tools(["wolfram-alpha"])
+```
+
+For more information on this, see [this page](../modules/agents/tools.md)