Classic API Endpoints

API / Service Format Authentication Live and Sandbox Endpoints
Merchant API Name-Value Pair API Signature https://api-3t.paypal.com/nvp
https://api-3t.sandbox.paypal.com/nvp
Merchant API SOAP API Signature https://api-3t.paypal.com/2.0/
https://api-3t.sandbox.paypal.com/2.0/
Merchant API Name-Value Pair API Certificate https://api.paypal.com/nvp
https://api.sandbox.paypal.com/nvp
Merchant API SOAP API Certificate https://api.paypal.com/2.0/
https://api.sandbox.paypal.com/2.0/
Adaptive Accounts JSON, NVP, SOAP, XML AppID https://svcs.paypal.com/AdaptiveAccounts/{API_operation}
https://svcs.sandbox.paypal.com/AdaptiveAccounts/{API_operation}
Adaptive Payments JSON, NVP, SOAP, XML AppID https://svcs.paypal.com/AdaptivePayments/{API_operation}
https://svcs.sandbox.paypal.com/AdaptivePayments/{API_operation}
Invoicing Service JSON, NVP, SOAP, XML AppID https://svcs.paypal.com/Invoice/{API_operation}
https://svcs.sandbox.paypal.com/Invoice/{API_operation}
Permissions Service JSON, NVP, SOAP, XML AppID https://svcs.paypal.com/Permissions/{API_operation}
https://svcs.sandbox.paypal.com/Permissions/{API_operation}