Looking for logging into the Developer Paypal 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 Developer Paypal site. After that you can login as usual with your login credentials.
https://developer.paypal.com/
https://www.paypal.com/sh/smarthelp/article/how-do-i-log-in-to-developer.paypal.com-ts1499
https://stackoverflow.com/questions/15337235/how-to-log-in-in-sandbox-paypal-account
https://stackoverflow.com/questions/15630776/how-to-login-https-www-sandbox-paypal-com-in-personal-test-account
https://stackoverflow.com/questions/15461110/cant-login-to-paypal-sandbox
https://docs.easydigitaldownloads.com/article/839-how-do-i-create-a-paypal-sandbox-account
https://www.paypal-engineering.com/2016/03/30/sandbox-account-linking/
http://wp-events-plugin.com/documentation/paypal-sandbox-mode/
https://articles.braintreepayments.com/guides/payment-methods/paypal/setup-guide
https://www.sagepay.co.uk/support/12/36/creating-a-paypal-test-account-0
https://learn.kajabi.com/resources/1zcxpjtrqq6keikwywmkem/
https://odoo-development.readthedocs.io/en/latest/qa/paypal.html
https://www.angelleye.com/create-paypal-sandbox-account/