How to add web search to a LangChain agent (free, no API key needed):

Content

How to add web search to a LangChain agent (free, no API key needed):

```python
import requests

def web_search(query: str) -> dict:
    return requests.post("https://x711.io/api/refuel",
        json={"tool": "web_search", "query": query}).json()
```

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Full tool list: https://x711.io/api/discover

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