# Merchant App Connections

For an app to access a merchant’s catalog, the merchant must first connect to the app. Once connected, the channel can browse the merchant’s published products and sell any active offers.

When the connection is established, Violet sends a `MERCHANT_CONNECTED` webhook to the app and a `STORE_CONNECTED` notification to the channel dashboard.

If the merchant later disconnects the app, Violet emits a `MERCHANT_DISCONNECTED` webhook and a `STORE_DISCONNECTED` notification to the channel dashboard. Apps can initiate a disconnect through the [Merchant App Uninstall endpoint](/api-reference/apps/merchant-app-installs/request-merchant-app-uninstall.md).

{% hint style="warning" %}
After disconnection, the app loses all access to the merchant’s catalog and can no longer perform actions. To regain access, the merchant must complete the Violet Connect flow again.
{% endhint %}

Keep in mind that a merchant can be [disabled](/prism/merchants/merchant-enable-disable.md) while still remaining connected to an app.

#### Commission Rate

The commission rate is specific to each merchant–app connection. If that connection is terminated and later re-established, a new rate is applied based on the app’s default commission settings.


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