# 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 %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://help.retailys.com/get-started/external-services.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.