How To Find Authorize.Net API Credentials
To obtain all API credentials, login to your Authorize.Net control panel.
IMPORTANT: These API credentials are not your Authorize.Net login and password, and cannot be used to log in to your account. These credentials enable your developer to link an application to your account.
How to find your API Login ID
Click Settings.
Click API Credentials & Keys.
How to find your Transaction Key
Click Settings.
Click API Credentials & Keys.
Select New Transaction Key, click Submit.
Verify your identity if prompted. Click REQUEST PIN.
Check your email or phone, as applicable. Enter PIN. Click VERIFY PIN.
Click CONTINUE.
Copy Transaction Key.
How to find your Public Client Key
Click Settings.
Click Manage Public Client Key.
Copy/paste Public Client Key.
And that's it!