Please enter your preferred domains separated by commas under commas in the AllowedAuthRedirectDomains setting in OpenAPI Configurations on PayPay for Developers and save the settings.
[Important Notes for Configuration]
Do not include spaces when separating with commas (as shown in the attached image).
Enter domain names only—exclude protocols (e.g.,
https://), paths, and port numbers.When you save the setting, please remember to push the Save Changes button at the bottom after selecting the green check mark next to the input field.
Note: For the Web Payment, you can use redirectURL without registering callback domains.