# Extensions

The Retailys system can be expanded with many other extensions that have an API. 

Currently, we support: 

* Sklik 
* Heureka.cz 
* Zboží.cz 
* Facebook for posting 
* PayPal 
* Comgate 
* Shipment 
* Google Analytics 
* Toplist.cz 
* EET 
* iDoklad 
* UOL 
* Smartsupp

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Tip: If you would like to create your own extensions, you can use our developer help and use the REST API to develop your add-ons yourself. Don't forget to contact us so we can make your app an official extension.
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