Add a new ActiveCampaign widget from your dashboard.

Click Create dataset beside Campaign metrics.

Enter your subdomain and API key, then click the Connect button.
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To find these details, see this article from ActiveCampaign's help center.

In the pop up window, login to your ActiveCampaign account. Follow the steps to create a connection and authenticate your ActiveCampaign account.

After you return to the connection panel, click Create widget to start creating your ActiveCampaign widget.
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To learn more about creating dataset widgets, see our guide to creating visualizations from datasets.