How to obtain an Authorize.net Login and Transaction Key

What is the API Login ID?

  • The API Login ID is a complex value that is at least eight characters in length, includes uppercase and lowercase letters, numbers, and/or symbols, and identifies your account to the payment gateway. (Example: 89MX0gtp247Q)
  • It is not the same as your login ID for logging into the Merchant Interface.
  • The two perform different functions. The API Login ID is a login ID that your website uses when communicating with the payment gateway to submit transactions. It is only used for your website or other business application’s connection to the payment gateway.
  • The API Login ID for your account is available in the Settings menu of the Merchant Interface.
    • IMPORTANT: The API Login ID is a sensitive piece of account information and should only be shared on a need-to-know basis.

To obtain your API Login ID:

  • Log on to the Merchant Interface at https://account.authorize.net
  • Select Settings under Account in the main menu on the left.
  • Click API Login ID and Transaction Key in the Security Settings section.
  • If you have not already obtained an API Login ID and Transaction Key for your account, you will need to enter the secret answer to the secret question you configured at account activation.
  • Click Submit.

What is the Transaction Key?

  • The Transaction Key is a 16-character alphanumeric value that is randomly generated in the Merchant Interface. (Example: 77K3W9BhdJ51c0sK)
  • It works in conjunction with your API Login ID to authenticate you as an authorized user of the Authorize.Net Payment Gateway when submitting transactions from your website.
  • Like the API Login ID, the Transaction Key is a sensitive piece of account information that should only be shared on a need-to-know basis.
  • The Transaction Key for your account is displayed on a confirmation page.
    • IMPORTANT: Be sure to record your Transaction Key immediately in a secure manner or copy it immediately to a file in a secure location, since it is not always visible in the Merchant Interface like the API Login ID. Once you navigate away from the confirmation page, there is no other way to access the Transaction Key in the Merchant Interface. You would have to generate a new Transaction Key.

To obtain a Transaction Key:

  • Log on to the Merchant Interface at https://account.authorize.net
  • Select Settings under Account in the main menu on the left.
  • Click API Login ID and Transaction Key in the Security Settings section.
  • Enter the secret answer to the secret question you configured when you activated your user account.
  • Click Submit.
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