Within the commercetools Merchant Center you can access the integration configuration by selecting Gr4vy in the side navigation. Within this menu there are three configuration sections.
Config

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API Configuration

This section contains the basic setup of the plugin. You will need to fill in the Gr4vy ID, Private Key, and Environment fields based on your environment.
API Configuration

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Options

This section allows you to further configure the behavior of the integration.
Options

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Theme

Control of the theming of the Embed component used in storefront. See Embed theming for more details.
Theming