How To Make A Proxy Checker In Python with 3 Easy Steps!

Proxies are the simple tools you can use to compile your data from the web and boost your business without fearing being blocked or banned. A proxy is an intermediary between your computer and the website you visit. A website can identify you by your Internet Protocol (IP) address when you don’t use a proxy server. Using a proxy adds an extra layer between your computer and the website. First, you connect to the proxy server that hides your IP address and displays a different one on the website. 

Some of the widespread use cases of proxies are:

  • Security
  • Privacy
  • Speed
  • Geolocation
  • Data Compilation

Some proxies don’t work due to several limitations. When you try to connect to the Internet, you get a timeout message. It is because the proxies are either too slow or don’t exist. Here comes the need for a proxy checker. You can save time by using a proxy checker to test your proxies. It helps you scan the proxies in bulk. When you use free proxies, you should know they shut down without a moment’s choice. Therefore, you have to keep your proxy checker handy. You will have to use it daily to check which proxies are working. 

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Tips To Use A Proxy Checker

Below are some tips you need to follow to use a proxy checker. 

  • Check the location – It is essential to check the location because if you go with a proxy from a place known for cyberattacks, you will have difficulty accessing the desired content. You might get banned and have to move to the next proxy on your list. 
  • Check the speed – Most people use proxy checkers to find the working proxies. It is essential, but you also need to look at the speed of the proxy checker. Some proxies work well but are incredibly slow. So, you must spend most of your time online waiting for connections. 
Tips To Use A Proxy Checker

How To Make A Proxy Checker In Python

Let’s see how we can make a proxy checker in Python with the help of the below steps.

How To Make A Proxy Checker In Python

Import Libraries

You need to import the following two libraries i-e.,

  • urllib.request
  • socket
import urllib.request , socket

Here, the urllib.request module defines the classes and the functions that help open URLs in the complex world. The URLs can either be a string or a Request object. 

On the other hand, a socket helps connect two nodes on a network to communicate with each other. You can import the socket library, make a simple socket and start two-way communication. The setdefaulttimeout() sets the default timeout for new sockets. 

Read The List Of Proxy IPs

You must read the proxy IP list in proxyList as shown below.

proxyList = ['']

The above line of code represents a sample proxy IP.

Define a Function

To check whether your proxies are working or not, you have to define a function as shown below.

def is_bad_proxy(pip):    
        proxy_handler = urllib.request.ProxyHandler({'http': pip})        
        opener = urllib.request.build_opener(proxy_handler)
        opener.addheaders = [('User-agent', 'Mozilla/5.0')]
    except urllib.error.HTTPError as e:        
        print('Error code: ', e.code)
        return e.code
    except Exception as detail:

        print( "ERROR:", detail)
        return 1
    return 0


  • The urllib.request.ProxyHandler causes the requests to go through a proxy. 
  • The urllib.request.build_opener returns an instance that chains the handlers in the order given.
  • addheaders is a property of urllib.opener(), and we need to change its value to an accepted User-Agent to fool the website we are visiting.
  • The urllib.request.install_opener installs an OpenerDirector instance as the default global opener. It is necessary to install the opener if you want urlopen to use that opener. Otherwise, you have to call instead of urlopen()
for item in proxyList:
    if is_bad_proxy(item):
        print ("Bad Proxy", item)
        print (item, "is working")

The is_bad_proxy() function detects the working proxies in the proxy IP list.

In the above code, the for loop iterates over the proxyList. We get a “Bad proxy” result if the proxy is not functional. 

Uses Of A Proxy Checker

There are many uses for a proxy checker. Some of them are given below.

  • The firewalls use a proxy checker to ensure their relative anonymity before searching for restricted information online.
  • Someone like a school administrator can use a proxy checker to ensure the network servers function normally. He can also use it to monitor pupils attempting to bypass firewall restrictions.
  • E-commerce sites, media, and broadcasting companies use proxy checkers to control the geographic usage of their services for better targeting of their advertising campaigns.
  • The proxy checkers protect E-commerce sites from scam orders and fraudulent data requests.
  • Proxy checkers or scanners are the frontline virtual defenders against data hackers that try new ways to bypass internet security measures.
Uses Of A Proxy Checker

Which Is the Best HTTP Proxy Online?

ProxyScrape is one of the most popular and reliable proxy providers online. Three proxy services include dedicated datacentre proxy servers, residential proxy servers, and premium proxy servers. So, what is the best possible solution for the best HTTP proxy? Before answering that questions, it is best to see the features of each proxy server.

A dedicated datacenter proxy is best suited for high-speed online tasks, such as streaming large amounts of data (in terms of size) from various servers for analysis purposes. It is one of the main reasons organizations choose dedicated proxies for transmitting large amounts of data in a short amount of time.

A dedicated datacenter proxy has several features, such as unlimited bandwidth and concurrent connections, dedicated HTTP proxies for easy communication, and IP authentication for more security. With 99.9% uptime, you can rest assured that the dedicated datacenter will always work during any session. Last but not least, ProxyScrape provides excellent customer service and will help you to resolve your issue within 24-48 business hours. 

Next is a residential proxy. Residential is a go-to proxy for every general consumer. The main reason is that the IP address of a residential proxy resembles the IP address provided by ISP. This means getting permission from the target server to access its data will be easier than usual. 

The other feature of ProxyScrape’s residential proxy is a rotating feature. A rotating proxy helps you avoid a permanent ban on your account because your residential proxy dynamically changes your IP address, making it difficult for the target server to check whether you are using a proxy or not. It is a great tool for web scraping.

Apart from that, the other features of a residential proxy are: unlimited bandwidth, along with concurrent connection, dedicated HTTP/s proxies, proxies at any time session because of 7 million plus proxies in the proxy pool, username and password authentication for more security, and last but not least, the ability to change the country server. You can select your desired server by appending the country code to the username authentication. 

The last one is the premium proxy. Premium proxies are the same as dedicated datacenter proxies. The functionality remains the same. The main difference is accessibility. In premium proxies, the proxy list (the list that contains proxies) is made available to every user on ProxyScrape’s network. That is why premium proxies cost less than dedicated datacenter proxies.

So, what is the best possible solution for the best HTTP proxies? The answer would be “residential proxy.” The reason is simple. As said above, the residential proxy is a rotating proxy, meaning that your IP address would be dynamically changed over a period of time which can be helpful to trick the server by sending a lot of requests within a small time frame without getting an IP block. 

Next, the best thing would be to change the proxy server based on the country. You must append the country ISO_CODE at the end of the IP authentication or username and password authentication. 


1. What are the tips for using a proxy checker?

The main things you need to look for in a proxy checker are:
1. Checking the location (where the proxy server is located)
2. Checking the speed of the proxy server

2. Which is the best HTTP proxy?

A residential proxy is the best HTTP proxy since it is a rotating proxy, meaning that your IP address would be dynamically changed over a period of time which can be helpful to trick the server by sending a lot of requests within a small time frame without getting an IP block. 

3. What are the uses of a python proxy checker?

1. Anonymity
2. Restrict bypass firewall restrictions in organizations and school
3. Access eCommerce websites internationally
4. Security against cyber attacks
5. Easy web scraping


We discussed that proxies are intermediaries between the client and the server. The proxy servers can act as a firewall, provide shared network connections, and cache data to speed up common requests. We can use a proxy checker to test our proxies to know which are working. Before using a proxy checker, we need to check the speed and location. Further, we could make a proxy checker in Python by importing the necessary libraries and defining the proxy checker function that determines the nature of the proxy i-e., functional or non-functional. 

I hope you got to know how to make a proxy checker in Python.