We provide a relay export for our submission integrations that can help you troubleshoot why your integration is not working. You can access that by filtering requests and choosing status "Failed."
When you click into an integration connection, you will see a Export Failed Relays button.
Click on that, open the Transactions Errors CSV, and analyze the "Response" column. This column will outline the cause of the failed relay through the title, status, message, and statesCode.
You should use this "HTTP response status codes" documentation to identify why your data did not pass through properly. 200-299 responses reflect that data was passed successfully. 400-599 responses will reflect data that was not passed properly and why. For example, 401 may reflect that you have incorrect login information for your integration.
Click below to learn about other potential failure reasons and how to resend relays!