Hands-On #4: Smartproxy Site Unblocker – A Detailed Review & Analysis

During the past weeks, Smartproxy added to the available services also a brand new API, called Site Unblocker, which promises to make our life easier when it comes to web scraping. Let’s see together how it works and if it passes our anti-bot tests.

What is Site Unblocker

Smartproxy, following the latest trend in the industry, launched its “super API”, called Site Unblocker. Basically, with only one API call, you have in your scrapers:

  • proxy management and rotation
  • geo-targeting options
  • javascript rendering
  • fingerprint management
  • sessions management

Let’s stress it to find out its potential!

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SmartproxySite Unblocker

Our testing methodology

As we did to the other “unblocker” API, we’ll use a plain Scrapy spider that retrieves 10 pages from 5 different websites, one per each anti-bot solution tested (Datadome, Cloudflare, Kasada, F5, PerimeterX). It returns the HTTP status code, a string from the page (needed to check if the page was loaded correctly), the website, and the anti-bot names.

The base scraper is unable to retrieve any record correctly, so the benchmark is 0.

As a result of the test, we’ll assign a score from 0 to 100, depending on how many URLs are retrieved correctly on two runs, one in a local environment and the other one from a server. A score of 100 means that the anti-bot was bypassed for every URL given in input in both tests, while our starting scraper has a score of 0 since it could not avoid an anti-bot for any of the records.

You can find the code of the test scraper in our GitHub repository open to all our readers.

This post is sponsored by Smartproxy, the premium proxy and web scraping infrastructure focused on the best price, ease of use, and performance.


In this case, for all The Web Scraping Club Readers, using the discount code WEBSCRAPINGCLUB10 you can save 10% OFF for every purchase.

Preparing for the test

First of all, you need to create an account on Smartproxy’s website and then look for the Site Unblocker plans. As mentioned before, since this is the Smartproxy Month, you’ll get a 50% off discount on every plan using the code SPECIALCLUB.

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Smartproxy Site Unblocker menu

After the plan is activated, you can start playing around on the website to test some URLs manually.

Clicking on the “Advanced parameters” you have more details and options to customize your request and see, at the bottom, how the request changes accordingly.

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Setting up the Scrapy scraper

As said before, I’ve manually chosen fifty URLs, ten per website, as a benchmark and input for our Scrapy spider.

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The scraper basically returns the Antibot and website names, given in input, the return code of the request, and a field populated with an Xpath selector, to be sure that we entered the product page and were not blocked by some challenge.

There’s no particular configuration to apply to the scraper, only the call to a proxy in the settings.py file.

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You can find anyway the full code of the scraper on the free GitHub repository of The Web Scraping Club.

First run: no Smartproxy’s Site Unblocker

With this run, we’re setting the baseline, so we’re running a Scrapy spider without the site unblocker.

As expected, the results after the first run are the following.

First run results
First run results

Basically, every website returned errors except Nordstrom, which returned the code 200 but without showing the product we requested.

Second run: using the Site Unblocker with only raw HTML requested

In this run, we’re trying the Site Unblocker without any additional headers to see if this is enough to bypass all the anti-bot challenges.

Having made all the setup in the settings.py file, the scraper is pretty basic.

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Here are the results.

While the solution works at 100% against Datadome, Cloudflare, and PerimeterX, we have mixed results against F5, but it’s something that can be solved with some retries, while Kasada seems that cannot be bypassed.

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Second run results

Third run: using Site Unblocker with Javascript rendering

To enable the browser rendering, the only thing to do is to review the requests parameter as follows.

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Here are the results, similar to the previous run.

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Third run results

Final remarks

Smartproxy’s site unblocker has just been released and has margins for improvements but it’s already performing well. Except for Kasada, all major anti-bots are easily bypassed with this solution


  • Integration with Scrapy is straight-forward
  • 100% success rate versus most famous anti-bots
  • Tweaking headers you can use advanced options like sticky sessions, geotargeting of the IPs, or custom cookies.
  • The price of 12$ per GB is one of the lowest for this kind of solution


  • Kasada actually not supported
  • There’s no pay-per-usage plan but only subscriptions, even if they start from really low, like 28$ per month for two GB.


The Smartproxy Site Unblocker is a brand new solution and the sins of its youth could be forgiven. It’s not that easy to bypass all the most known anti-bot solutions right from the start and the tweaks for scraping Kasada could come in the next months.

For today, its score is 80/100, a good result! In case you’re interested, you can try it on Smartproxy’s website and, using the code SPECIALCLUB you can get a 50% off discount.

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