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chapter8.md

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+## Chapter 8: Integration with external APIs
+By using LangChain to integrate with external APIs, you can build AI applications that leverage richer sources of information.
+
+```
+from langchain.utilities import OpenWeatherMapAPIWrapper
+from langchain.agents import initialize_agent, Tool
+from langchain.llms import OpenAI
+
+# OpenWeatherMap API
+weather = OpenWeatherMapAPIWrapper()
+
+
+tools = [
+    Tool(
+        name="Weather",
+        func=weather.run,
+        description="useful for when you need to answer questions about the weather"
+    )
+]
+
+
+agent = initialize_agent(tools, OpenAI(temperature=0), agent="zero-shot-react-description", verbose=True)
+
+
+agent.run("What's the weather like in Munich right now?")
+
+```