Access your account, click on your account icon at the top right corner of the screen, and select API from the drop-down menu.

Navigate to the API Management tab and click on Create New Key.

Select System-generated API Keys and under “API Key Usage” select API Transaction.

Whitelist the below IP addresses so the key does not expire prematurely:

Set the permissions for the API key as Read-only, select all Read-only boxes and click submit.

Note down the Key and Secret to input in the key and secret fields in Otto.