Good day @FFiedler Thank you for posting to the PayPal community. To access transaction details through NVP API, kindly refer the detailed guide link below URL - https://developer.paypal.com/docs/nvp-soap-api/transaction-search-nvp/ For Invoice operations via NVP API, please use the below link: https://developer.paypal.com/api/nvp-soap/create-invoice/#link-createinvoiceapioperation https://developer.paypal.com/api/nvp-soap/get-invoice-details/ For Invoice operations via REST API, please use the below link: https://developer.paypal.com/docs/api/invoicing/v2/#invoices_get Note: Merchants can also integrate our payment event notification services. For NVP/SOAP API integration, please use the Instant Payment Notification(IPN) service to get the payment notifications. Refer to the guide link - https://developer.paypal.com/docs/api-basics/notifications/ipn/ If your still facing issues, please create an MTS ticket via - https://www.paypal-support.com/s/?language=en_US with the detailed information and error details. Sincerely, Kavya PayPal MTS If this post or any other was helpful, please enrich the community by giving kudos or accepting it as a solution.
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