Looking for logging into the Paypal Merchant Id site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Paypal Merchant Id site. After that you can login as usual with your login credentials.
https://www.paypal.com/us/smarthelp/article/FAQ3850
https://developer.paypal.com/docs/classic/admin/
https://www.paypal-community.com/t5/Selling-on-your-website/how-do-I-find-my-merchant-id/td-p/284430
https://stackoverflow.com/questions/34555632/sandbox-merchant-id-paypal
https://stackoverflow.com/questions/28365335/how-could-i-get-merchant-account-id-of-paypal
https://www.zen-cart.com/showthread.php?115351-Payflow-vendor-merchant-login-id-in-paypal-sandbox
https://www.blackbaud.com/support/howto/coveo/luminate-online/subsystems/donation_management/content/concepts/Admin_Online_Giving_Management_MerchantAccounts_PayFlowPro.html
https://www.bectin.com/random-insights/paypal/86-how-to-find-my-paypal-merchant-id
https://gethelp.wildapricot.com/en/articles/535-paypal-payflow-pro
https://articles.braintreepayments.com/control-panel/important-gateway-credentials
https://shopplugin.net/docs/gateway-addons/paypal-payflow-pro/
https://help.infusionsoft.com/help/paypal-payflow-pro-merchant-account
https://support.americommerce.com/hc/en-us/articles/201906260-Setting-Up-PayFlow-Pro