Authorize.Net – Gateway Error: Access Denied. you do not have permissions to call the Transactions Details API

You may encounter this error in a number of places. most commonly when you attempt a refund of an transaction.

For some reason, some users need to manually activate the Transaction API. To do this follow these steps:
  1. Log on to the Merchant Interface at
  2. Select Settings under Account in the main menu on the left.
  3. Click the Transaction Details API link in the Security Settings section. The Transaction Details API screen opens.
  4. If you have not already enabled the Transaction Details API, enter the answer to your Secret Question, then click Enable Transaction Details API.
  5. When you have successfully enabled the Transaction Details API, the Settings page displays.

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