Phoca Cart payment method has minimum parameters. You can add API Login ID and Transaction Key, set up status for completed and failed payments. Also, it is possible to enable sandbox mode.
Authorize.net requires just the following parameters:
Note: this payment method does not support rounding of total amount (calculation) to 0 or 1 symbols after the comma.
Service Price: € 79,95
You can send request and we will discuss details.