This is the settings overview for the GetPaid > Settings > Payment Gateways > Authorize.net page. 

Authorize.net Settings 

• Activate – Check this box to enable this payment gateway. 
• Sandbox – If checked, sandbox can be used to test payments. 
• Checkout Title – The title of the checkout page. 
• Checkout Description – The description of the checkout page. 
• Priority – Specify the priority of the gateway. 
• API Login ID – Input your API login key here. 
• Transaction Key – Input the transaction key in this field. 
• Signature Key – Input your Authorize.net signature key here, 
• Webhook URL – You can create a webhook URL to act as an endpoint when receiving payments.