> For the complete documentation index, see [llms.txt](https://help.retailys.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.retailys.com/get-started/external-services.md).

# External services

To run a successful online business, it is necessary to connect the electronic stores to many others external services such as payments gateways, price comparators, logistic services, accounting and information systems or many others. Retailys provides wide range of connection and extensions that ad the new functions to do system and increase the sales success.

All the integrations and additional functions can be found in the section Extensions.

{% hint style="info" %}
Retailys has a large API layer to connect to other third-party services. Internal company developers can connect to internal information systems or develop any other custom extensions. For developers there is provided a special help.
{% endhint %}


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