Magento Admin: System->Configuration->Pay Pal Accounts
URL: as provided by paypal - https://payflowpro.verisign.com/transaction for me see https://cms.paypal.com/cms_content/US/en_US/files/developer/PP_WPPPF_HTTPS_Interface_Guide.pdf
User : logon to paypal and go to profile→Request API Credentials→Set up Payflow Pro API access
Vendor : same as user
Password : same as user
Debug Flag : Logs the HTTP request and response to the database table PAYPAY_API_DEBUG.
Business Name: Name of business of you paypal account.
Business Account: Email address on file with your paypal account.
Paypal Logo Image URL: URL of a custom logo for customer to see on paypal’s website when they check out. Maximum image size is 750x90px. (If you want to override the paypal image which is located at top left corner for the paypal page )
Sandbox: Tells Magento to use the paypal sandbox set up within paypal. - For testing!
Debug: I believe this allows an admin to debug the transaction as it is processed. (This flag is for a developer, who wants to debug what information Magento send to paypal and what information we receive from paypal. The information is saved in database.)
Comprehensive tutorial on setting up PayPal Website Payments Standard in Magento The tutorial language is German, use Google Website Translator.
API User Name: logon to paypal and go to profile→Set up PayPal API credentials and permissions→View or Remove Credentials
API Password: logon to paypal and go to profile→Set up PayPal API credentials and permissions→View or Remove Credentials
API Signature: logon to paypal and go to profile→Set up PayPal API credentials and permissions→View or Remove Credentials
Page Style: BLANK
Proxy Host: BLANK
Proxy Port: BLANK
Sandbox Flag: NO
Debug Flag: NO
Use Proxy: NO
Paypal URL: This is an interesting one. This this is the URL I was orginally given by paypal: https://www.paypal.com/cgi-bin/webscr?cmd=_express-checkout&useraction=continue&token=
However there where issues (magento 1.1.8.*), so I read the documentation and started to use this URL:
which was working for me until I upgraded to Magento 126.96.36.199