How Mergado Helps You Advertise on Heureka#

Do you want to expand your sales into the Czech Republic and Slovakia and reach millions of new customers? Then Heureka is one of the key advertising channels for you. It is the most widely used product search engine in the Czech Republic and Slovakia. It works as the largest price comparison site in the region and also as a marketplace where customers can buy directly.

To display your products on Heureka correctly, you need to provide product data in the correct XML format. Mergado lets you prepare them for Heureka exactly according to their requirements – without any advanced programming.

What Mergado Can Help You With#

Mergado is a tool that lets you:

easily convert your feed into Heureka format (Heureka.cz and Heureka.sk), whether you are converting a feed directly from your online store platform (e.g., Shoptet, WooCommerce, Upgates, etc.) or from another feed format (e.g., Google Shopping) – all without a developer,
run a free Feed Audit at any time, which detects errors and immediately recommends fixes,
automatically pair your products with the correct Heureka categories,
edit the feed according to your needs so you only advertise what brings you profit (e.g., hide sold-out or seasonal products),
fix feed errors,
automatically manage bidding (click prices), pricing, and product images,
analyze and continuously improve your advertising.

Heureka Formats Supported by Mergado#

Mergado supports the full set of Heureka-specific formats that are essential for your advertising to work properly:

Heureka – product
Heureka – availability
Heureka – conversion
Heureka – shop reviews
Heureka – product reviews

Heureka Product XML Feed#

The most important format for you is Heureka.cz - product [CZ] or Heureka.sk - product [SK]. You must send your product data to Heureka in this format – Heureka does not accept any other format. To convert your feed format to the Heureka format, simply choose the appropriate input format (your feed format – Mergado will recognize it automatically in the vast majority of cases) and select Heureka.cz - product [CZ] or Heureka.sk - product [SK] as the output format when creating a project. Mergado will automatically (through the “Converter” feature) take care of the correct output data structure required by Heureka. Read the article on how to create a new project step by step.

Heureka Availability XML Feed#

The availability feed contains up-to-date information about your products’ stock levels and availability. It is not mandatory, but providing it ensures that Heureka always displays the correct availability of your products.

Your online store platform should generate the availability feed, but you may want to edit it before sending it to Heureka (for example, if your availability feed does not exactly match Heureka’s requirements). If your online store system does not generate this feed, you can create it in Mergado. In these cases, set Heureka.cz – availability [CZ] or Heureka.sk - availability [SK] as the output format when creating a project.

Heureka Conversion / Shop Reviews / Product Reviews XML Feed#

These three feed format types are generated by Heureka itself from your data. You will use them primarily if you want to transfer your Heureka reviews to Google Merchant Center so they can appear directly in your Google ads.

How to Connect the Mergado Output Feed to Heureka#

You have created a project, your online store data flows into Mergado, you have edited it according to your needs, and Mergado has created an output feed in Heureka format. To get the data flowing into Heureka, you need to paste the output feed URL into your Heureka account administration.

In the selected project in Mergado, go to the Overview page and copy the output feed URL (the output feed URL is in the field at the top right of the page).
Log in to your Heureka.cz or Heureka.sk account and click E-shop administration.
Go to the Overview page and click Edit shop.
In the E-shop information section, paste the copied output feed URL from Mergado into the XML import URL field and save the changes.

Why and How to Connect Heureka with Mergado Keychain#

For your Heureka advertising to be successful, you need to continuously analyze its performance and make adjustments based on the results. The Analytics page in each Mergado project gives you the ability to easily track your advertising performance through clear charts and tables.

To display analytics, you need to ensure that the necessary data not included in the product feed (such as order information) flows from your Heureka account into Mergado. You do this by connecting Heureka with Mergado through the Mergado Keychain extension.

Keychain serves as a secure storage where you enter your Heureka login credentials, and Mergado will then automatically download the data needed for analytics. You will not need to enter credentials into Mergado every time you want to check analytics.

(Read more about the Mergado Keychain extension.)

Data from Heureka is loaded into Analytics with a delay – always in the morning for the previous day – and Mergado works with a 70-day time window. This means Analytics in Mergado stores and displays data for the last 70 days, with new data for the previous day added each day.

You will also need the Mergado–Heureka connection through Keychain when you decide to use any Mergado extensions that work with Heureka data (e.g., Bidding Fox, Pricing Fox).

How to Connect Heureka via Mergado Keychain#

Mergado Keychain is free for Mergado Editor users and is activated automatically when creating a project. You just need to create the connection with Heureka.

On the main page of Mergado Editor, click the online store for which you want to set up the Heureka connection in Keychain.
In the left sidebar, you will see a list of your active extensions. Click Mergado Keychain.
In the Connections section, select Heureka and click Create.
Enter your login credentials and choose whether to create a connection for Heureka.cz or Heureka.sk.
Confirm by clicking Log in.

Tip! If you change your login credentials (e.g., password) in your Heureka account, do not forget to update them in Mergado Keychain as well. Otherwise, Keychain will report a connection error. Simply delete the connection and recreate it with the new credentials.

You can create a connection with your Google Analytics account in Mergado Keychain the same way, and Mergado Analytics will also work with that data. Follow the same steps as for Heureka, but when creating the connection, select Google Analytics 4, log in with your Google account, and approve Mergado’s access to your data.

When connecting Google Analytics, keep in mind that Analytics may show discrepancies in numbers due to the combination of different data sources.

For even more detailed analytics, you can also add Mergado Analytical XML through Mergado Keychain, which lets you easily and clearly track the cost of goods or calculate profit. You can find instructions on how to create the XML analytics file here. Then, in Mergado Keychain, paste the created file URL in the Sources section and click Save.

Tip! If you want to make sure no one accesses sensitive data like your cost of goods, restrict file access to the Mergado application only. Mergado accesses the Mergado Analytical XML from this IP address: 81.31.39.112.

Check out what other IP addresses Mergado uses.

FAQ#

What is Heureka and why advertise on it?#

Heureka is the most widely used advertising platform in the Czech Republic and Slovakia. It works as both a price comparison site and a marketplace. It provides high reach and is ideal for online stores that want to reach millions of shoppers.

How does Mergado help me with advertising on Heureka?#

Mergado lets you easily prepare product data exactly according to Heureka’s requirements without any programming. It helps with data editing, category and product pairing, bidding, and performance analysis.

What are the main benefits of using Mergado?#

Data conversion to Heureka format (for both Czech and Slovak Heureka) – Mergado converts your product feeds from various sources (Shoptet, WooCommerce, Upgates, Google Shopping, etc.) into a format that exactly matches Heureka’s requirements.
Free feed audit – you can run an audit of your product feed at any time to detect errors and get immediate fix recommendations.
Product pairing – with Mergado, you can easily edit data so your products can be paired with the corresponding product cards on Heureka and become visible to customers.
Bulk and automatic feed editing – using easy-to-configure rules, you can automatically and in bulk edit data for thousands of products. For example, segment products, hide sold-out or seasonal items, set CPC, rename categories according to Heureka’s category tree, and more.
Feed error fixing – easily fix errors that prevent advertising or reduce its performance, even without programming knowledge.
Automatic bidding (CPC), pricing, and image management.
Performance analytics and continuous advertising improvement.

What Heureka formats does Mergado support?#

Mergado supports the full set of Heureka-specific formats that are essential for your advertising to work properly. These include the product feed format (essential for displaying your products on Heureka), availability feed (which provides Heureka with stock and availability data), and also feed formats generated by Heureka itself that you can use, for example, when transferring reviews from Heureka to Google Merchant Center (conversion, shop reviews, and product reviews).

What is the Heureka product feed and how do I create it in Mergado?#

It is a format that exactly matches Heureka’s specification and ensures your advertising works. In Mergado, you create a project where you paste your product feed URL as the input. As the output feed, choose Heureka.cz - product [CZ] or Heureka.sk - product [SK]. Mergado will ensure your data in the output feed is structured exactly as Heureka requires. At the same time, Mergado lets you edit your data easily, automatically, and in bulk – even without programming knowledge.

What is the Heureka availability feed for?#

The availability feed contains data about the current stock levels and availability of your products. It is a supplementary feed to your product feed. It is not mandatory, but it ensures correct availability display on Heureka. Heureka downloads it every 10 minutes, ensuring frequent availability updates and minimizing clicks on products that appear available on Heureka but may already be sold out in your online store. It can usually be generated by your online store platform. If not, you can create or edit it in Mergado by choosing Heureka.cz - availability [CZ] or Heureka.sk - availability [SK] as the output format.

What are the Heureka conversion / shop reviews / product reviews feed formats for?#

These feed formats are generated by Heureka from your data. You can use them, for example, to transfer reviews from Heureka to Google Merchant Center so they appear directly in your Google ads.

How do I get data from Mergado into Heureka?#

In the Mergado project, go to the Overview page and copy the output feed URL (top right).
Log in to your Heureka account and go to E-shop administration.
On the Overview page, click Edit shop.
In the E-shop information section, paste the output feed URL from Mergado into the XML import URL field and save.

Why connect Heureka with Mergado via Keychain?#

If you want to use the Analytics page in Mergado to track your advertising performance, you need to give Mergado access to data from your Heureka account. This includes data not contained in your product feed, such as order information. You grant access through the Mergado Keychain extension, which is free for Mergado Editor users and is activated automatically when creating a project. Simply save your Heureka account login credentials in Keychain, and Mergado will automatically download the data needed for analytics. Your credentials are safe in Keychain – not even Mergado’s technical support staff can access them.

How can I analyze my Heureka advertising?#

On the Analytics page in each Mergado project, you will find clear charts and tables about your Heureka advertising performance. For Mergado to run analytics, you need to create a connection with your Heureka account through the Mergado Keychain extension.

Data from Heureka is loaded with a delay – the following morning for the previous day. Analytics works with a 70-day time window.

How do I connect Heureka via Mergado Keychain?#

The Mergado Keychain extension is free for Mergado Editor users and is activated automatically when a project is created.

On the main page of Mergado Editor, click the online store for which you want to set up the Heureka connection in Keychain.
In the left sidebar, you will see a list of your active extensions. Click Mergado Keychain.
In the Connections section, select Heureka and click Create.
Enter your login credentials and choose whether to create a connection for Heureka.cz or Heureka.sk.
Confirm by clicking Log in.

What if Keychain reports a connection error?#

The most common reason for a Keychain connection error is outdated login credentials. If you changed your password or login email in your Heureka account, you need to update the credentials in Keychain as well. Delete the existing connection in Keychain and create a new one with the current credentials.

Why do I see no Heureka data on the Analytics page?#

For Mergado to analyze your Heureka data and prepare clear charts and tables, it needs access to that data. You grant access by creating a connection in the Mergado Keychain extension. Save your Heureka account login credentials in Keychain, and Mergado will be able to automatically download the data needed for analytics.

Can I also send Google Analytics data to Mergado Analytics?#

Yes. However, for your Google Analytics data to flow into Mergado, you need to create a connection through the Mergado Keychain extension. This extension is free for Mergado Editor users and is activated automatically when a project is created.

On the main page of Mergado Editor, click the online store for which you want to set up the Google Analytics connection in Keychain.
In the left sidebar, you will see a list of your active extensions. Click Mergado Keychain.
In the Connections section, select Google Analytics 4 and click Create.
Log in with your Google account and approve Mergado’s access to your data.

Can I track costs and profit in Analytics?#

Yes, through the Mergado Keychain extension, you can add the Mergado Analytical XML to Mergado and track the cost of goods or profit in Analytics. In Keychain, paste the URL of the Mergado Analytical XML file in the Sources section and click Save.

Can I secure the Mergado Analytical XML? Will Mergado still be able to access it?#

Yes. If you secure your cost XML with an IP address whitelist (meaning only allowed IP addresses can access the file), add Mergado to the whitelist. Mergado accesses the file from IP address 81.31.39.112.

Can I hide sold-out or seasonal products in the output feed?#

Yes. Using the Hide product rule, you can set up Mergado to hide selected products in the output feed so they will not appear on Heureka. This saves you advertising costs because you will not advertise products that customers cannot buy.

Does Mergado help with pairing to Heureka categories and product cards?#

Yes. Mergado Audit helps you identify errors and issues that prevent Heureka from assigning your products to the correct product categories and matching them to the right product cards – and therefore rejecting and not displaying your products. You can then easily and automatically fix these errors in Mergado Editor.