LangChain Proxy SetupWeb tools and agents with mobile IPs

import os

# Set proxy for all requests-based LangChain tools
os.environ["HTTP_PROXY"] = "socks5://user:pass@proxy.proxies.sx:10001"
os.environ["HTTPS_PROXY"] = "socks5://user:pass@proxy.proxies.sx:10001"

from langchain_community.tools import DuckDuckGoSearchRun
from langchain_community.document_loaders import WebBaseLoader

# Tools now use mobile proxy automatically
search = DuckDuckGoSearchRun()
result = search.run("latest AI news")

loader = WebBaseLoader("https://example.com")
docs = loader.load()

import requests
from langchain_community.document_loaders import WebBaseLoader

# Create proxied session
session = requests.Session()
session.proxies = {
    "http": "socks5://user:pass@proxy.proxies.sx:10001",
    "https": "socks5://user:pass@proxy.proxies.sx:10001"
}

# Use session with WebBaseLoader
loader = WebBaseLoader(
    "https://example.com",
    session=session,
    requests_kwargs={"timeout": 30}
)
docs = loader.load()

from langchain_community.agent_toolkits import PlaywrightBrowserToolkit
from langchain_community.tools.playwright.utils import create_async_playwright_browser

# Create browser with proxy
async def get_proxied_browser():
    browser = await create_async_playwright_browser(
        headless=True,
        proxy={
            "server": "socks5://proxy.proxies.sx:10001",
            "username": "your_username",
            "password": "your_password"
        }
    )
    return browser

# Use with toolkit
browser = await get_proxied_browser()
toolkit = PlaywrightBrowserToolkit.from_browser(async_browser=browser)
tools = toolkit.get_tools()

import os
os.environ["HTTP_PROXY"] = "socks5://user:pass@proxy.proxies.sx:10001"
os.environ["HTTPS_PROXY"] = "socks5://user:pass@proxy.proxies.sx:10001"

from langchain_openai import ChatOpenAI
from langchain.agents import AgentExecutor, create_react_agent
from langchain_community.tools import DuckDuckGoSearchRun
from langchain import hub

# Initialize LLM
llm = ChatOpenAI(model="gpt-4", temperature=0)

# Get search tool (now proxied)
search_tool = DuckDuckGoSearchRun()
tools = [search_tool]

# Create ReAct agent
prompt = hub.pull("hwchase17/react")
agent = create_react_agent(llm, tools, prompt)
agent_executor = AgentExecutor(agent=agent, tools=tools, verbose=True)

# Run agent - all web requests go through mobile proxy
result = agent_executor.invoke({
    "input": "What are the top AI companies in 2025?"
})