# Solution architecture
DotApparel is exclusively installed on [Google Cloud](https://cloud.google.com/), a cost-effective and secure cloud computing platform. Here is a diagram that shows the connection between two brands running our DotApparel Core solution connecting ERP into Shopify, one of which has two regional stores. We can see that each of the DotApparel projects sits within a single Google Cloud account and it gets its data from the ERP database.
{% hint style="info" %}
For merchants using the **Apparel21** ERP, you may be interested to learn which Retail API endpoints DotApparel is using to fetch product data. We use two separate endpoints.
* First, we use the `ProductsSimple` endpoint to get a list of all the visible style codes according to your filter. Then, we make a separate request to the `Products/{id}` endpoint for each style code to get all the details, like colours, sizes, and notes.
* In some versions of Apparel21, they also make separate requests to the `ProductNotes/{id}` endpoint to get product notes, but in newer versions, these notes are included in the main `Products/{id}` endpoint, so they don't need to use the separate endpoint anymore.
{% endhint %}
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