How to use proxies to collect data from marketplaces (parsing, analytics, competitive intelligence)

In the e-commerce world, data is the new oil. Whoever owns the information on prices, assortment, and competitor strategies controls the market. Marketplaces like Amazon, Ozon, Wildberries, or Alibaba are giant, constantly updated databases containing this valuable information. To obtain it is to gain a decisive competitive advantage.

The only way to extract this data on an industrial scale is through parsing (or web scraping). But there is a problem: marketplaces are well aware of this and actively defend themselves.

In this article, we will break down how marketplace protection is structured and how, by using the right proxies and technologies, you can build an effective data collection system for analytics and competitive intelligence.

Important Note: When automating data collection, ensure that your actions comply with the law (including GDPR and DMCA) and do not violate the Terms of Service (ToS) of the target platforms. Use proxies responsibly: avoid creating critical loads on servers and adhere to web scraping ethics.

Why don't marketplaces want to be parsed?

Collecting data manually is inefficient and slow. Automated collection (parsing) allows you to obtain huge datasets in a short time. This is exactly why marketplaces build entire echelons of defense:

• IP Blocking. The most basic and effective protection method. If an anomalously high number of requests comes from a single IP address, it immediately ends up in a temporary or permanent ban.
• Rate Limiting. The system allows, for example, no more than 30 requests per minute from one IP. Everything above the limit is blocked.
• CAPTCHA. If the system notices signs of automation, it presents the user with a captcha that a standard parser cannot pass.
• Geo-blocking. Prices, assortment, and delivery conditions on the same marketplace can differ cardinally for users from the USA and Germany. Without an IP address from the required region, you simply won't see relevant data.

• Fingerprint Analysis. Advanced systems analyze hundreds of parameters of your browser. Examples of exactly what marketplaces check:

  • Canvas and WebGL fingerprinting: websites force the browser to invisibly draw a hidden shape. The specific way your graphics card and drivers render pixels creates a unique device identifier.

  • Audio fingerprinting: checking how your system processes audio signals.

  • Technical headers: a mismatch between the User-Agent version and installed fonts or screen resolution instantly flags you as a bot.

Proxies — your key to data. But not just any proxy.

A proxy server is the technological foundation of any professional parser. It acts as an intelligent intermediary: it hides your real address and allows you to simulate requests from thousands of unique users from anywhere in the world.

However, it is worth understanding: in modern realities, even the highest quality proxies do not guarantee 100% protection against blocking if they are used in isolation from other tools. Marketplaces analyze a combination of factors. If your IP is a "clean" residential address, but the digital fingerprint identifies you as a bot, the system will still impose restrictions.

To achieve the maximum result, proxies must be combined with anti-detect technologies, proper header configuration, and human-like delays between requests.

Why does the proxy type matter?

Not all types of connections are suitable for parsing marketplaces. Below we will analyze the main types and determine which tasks each will be most effective for.

Proxy types and their applicability:

Residential rotating proxies  — Choice #1 for mass parsing

These are dynamic IP addresses of real home users.

• Advantages: Huge pools (millions of IPs) worldwide. A request from such an address looks to a marketplace like a visit from an ordinary customer via home Wi-Fi.

• Verdict: Ideal for collecting large datasets: monitoring prices, stock levels, and product card content.

• Flexible session settings: Depending on your tasks, you can choose one of three operating modes:

  1. Random IP: Automatic address change for every new request.

  2. Short session: Holding one IP for a period of up to 1 minute (convenient for quick action chains).

  3. Long session (Sticky): Fixing an IP for a long term — strictly up to 6 hours (necessary to simulate a user staying on the site for a long time).

Static residential proxies (ISP)  — For the "long game"

These are clean IPs from home providers that are assigned to you for the entire rental period.

• Advantages: They combine the trust of a residential address with the stability of a server channel. The IP does not change, which is critically important for protection systems.

• Verdict: Indispensable for managing seller accounts, advertising accounts, and working with personal cabinets where any IP change or rotation could lead to an instant profile block.

Mobile private proxies  — The ultimate solution

Use IP addresses from cellular operators (4G/5G).

• Advantages: Highest level of trust. Thanks to CGNAT technology, one IP is shared by thousands of real people, so marketplaces almost never block these addresses.

• Dedicated ports: For ultra-complex cases (account registration, bypassing protection at the Amazon/Akamai level), we recommend mobile dedicated ports. They provide an individual channel, maximum speed, and stability without "neighbors."

Server proxies (Datacenter)

• • Advantages: High speed and low price.

  • Verdict: Suitable only for small, poorly protected sites or working through official APIs. Large marketplaces see them as "bots" and block entire subnets.

Specifics of working with Mobile proxies in the interface

Managing  mobile proxies  has its own unique features in the personal account. Unlike other types, this product card features a special API link for rotation (IP change). You need to find it in the interface, as this specific address is used for automated IP updates within your software code or script.

Fig. 1. Location of the automatic rotation link in the Mobile Proxies card.

In addition to software automation, the CyberYozh App provides the possibility of manual management. If you need to update the IP address instantly without waiting for the script to trigger, you can do it with one click directly in the control panel.

Fig. 2. Button for forced manual IP address change in the personal account.

Technical subtleties: Sessions, rotation, and infrastructure

Choosing the proxy type is just the beginning. Other parameters are important for professional parsing.

• Parsing infrastructure. Remember that proxies are only part of the system. Effective parsing requires:
• A reliable parser: A script or program (e.g., in Python using Scrapy, BeautifulSoup, Selenium libraries) capable of processing HTML code.
• User-Agent and Headers rotation: Your parser must pretend to be different browsers and devices, constantly changing not only the IP but also the technical headers.
• Error handling: A mechanism that will correctly handle temporary blocks, captchas, and errors, retrying failed requests through a different proxy.

Managing  residential rotating proxies  is implemented as flexibly as possible. You can either configure parameters manually via login prefixes or use the built-in generator in the personal account.

Management via Personal Account (Recommended method)

To get ready-made settings, simply go to the "My Proxies" section and, in the card of the purchased package, click the "Generate credentials" button.

In the menu that opens, you can visually select:

• Geolocation: country, region/state, and specific city (for long sessions, country only).

• Session type: random IP, short session (session ID - up to 1 minute), or long session (long session ID - up to 6 hours).

• Protocol: HTTP or SOCKS5.

• Output format: 3 output formats are available in our generator for easy copying into any software:

  • IP:PORT (IP:PORT:USER:PASS)

  • USER:PASS (USER:PASS@IP:PORT)

  • PROTOCOL (http://USER:PASS@IP:PORT)

The generator will automatically form the correct connection string with all necessary prefixes.

Fig. 3. Navigating to the configuration and connection parameters creation interface (credentials generator).

Fig. 4. Using the generator to configure the sid parameter, responsible for creating new unique sessions.

Fig. 5. Configuring parameters to generate credentials using long (Sticky) sessions.

Fig. 6. Result of the credentials generator.

Session types and manual prefix management

If you are configuring the IP change logic directly in your script code, use the prefix system:

Important nuances of manual configuration:

• Short sessions: In the prefix -sid-47551677, you can use any random number of the same length to instantly create a new session.

• Geo-prefix in short sessions: For example, -res_sc-us_georgia_macon-sid-12345 will route your traffic through Macon, Georgia.

• Long sessions (Sticky): To work manually, you need to obtain an X-NN-LLS token via a trial curl request and substitute it in the login instead of 0 after -nnid-. Through the generator in the PA, this token is inserted automatically.

Checking proxies via terminal (curl)

The fastest way to ensure everything is configured correctly is to execute a request in the console. This allows you to see the technical headers from the server and verify the correct operation of prefixes.

1. Checking a random residential IP

Use this format if you need high rotation (IP change for every request):

curl -v -x http://LOGIN-res-any:PASSWORD@51.77.190.247:5959 https://ipv4.icanhazip.com

2. Working with a long session (Sticky up to 6 hours)

To activate a long session manually, you need to go through two stages:

Stage A: Obtaining a session token Execute a request, specifying 0 in the nnid parameter:

curl -v -x http://LOGIN-resfix-us-nnid-0:PASSWORD@51.77.190.247:5959 https://ipv4.icanhazip.com

Here us is the country prefix (USA), which can be replaced with the code of any other available country.

Stage B: Extracting and using the token

In the server response, find the line with the X-NN-LLS header: HTTP/1.1 200 Connection established X-NN-LLS: 9d016e262509d3827293

Copy the received token (9d016e262509d3827293) and substitute it instead of 0 in the login for all subsequent requests to keep the same IP: 51.77.190.247:5959:LOGIN-resfix-us-nnid-9d016e262509d3827293:PASSWORD

💡 Tip: To avoid performing these actions manually, use the Credentials Generator in the CyberYozh App personal account. When selecting "Long session ID," the system will automatically generate and provide you with a ready-made login with an already active token for the selected country.

Conclusion: From data to strategy

Competitive intelligence on marketplaces is not magic, it is technology. At its core lies a well-built process of data collection, and the foundation of this process is high-quality, properly selected proxies.

Saving on proxies when parsing is the most expensive mistake, leading to incomplete data, blocked tools, and ultimately, incorrect business decisions. Invest in a reliable infrastructure, and you will gain access to information that will become your main trump card in the competitive struggle.

👉 Looking for a reliable parsing solution? Our rotating residential proxies provide access to millions of clean IP addresses worldwide with flexible session management. This is the ideal tool for collecting data from any, even the most protected, marketplaces.