There are three URLs listed on the endpoint of the specification. Which one should I use? August 14, 2024 05:53 Test environment: Sandbox server Production environment: Production server Please do not use the Staging server. Related articles Can I use the PayPay app in a test environment? Is it possible to set query parameters in the redirect URL? When is an account link required? What if I need a recurring subscription payment? Execution of "merchant_topup" results in the return of the "SUSPECTED_DUPLICATE_ORDER" error. What could be causing this?