> For the complete documentation index, see [llms.txt](https://docs.mmoweb.biz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mmoweb.biz/en/quick-start-guide/settings/platezhnaya-sistema/podklyuchenie-agrigatorov.md).

# Payment agregator setup

Payment systems are located in projects -> Projects 

1. Select the desired site and click the "edit" button 
2. Go to the `Payment system` tab

![Edit project settings button](/files/-MBLbhldBLoeEk09Ueu2)

You should choose Payment Gateways

| Agregator    |
| ------------ |
| UnitPay.ru   |
| NextPay      |
| Free-Kassa   |
| PayPal       |
| Paygol       |
| G2A Pay      |
| PayOp.com    |
| PayU         |
| Alikassa.com |

Each payment system has its own set of settings, which is characteristic only for this system. 

We have added comments to each field in the settings window. 

<figure><img src="/files/h20X5ZxreR6qcdBY5DGz" alt=""><figcaption></figcaption></figure>

For example, in the screenshot above you can see how under NextPay it is written in red "Balance replenishment" - this indicates the type of store being created in this system. After each change of the project settings, the MMO system will remind you to load them into client side of MMO.&#x20;