Troubleshooting & Error Messages

Basic troubleshooting for API connectivity and reference guides for response codes, error messages, and more.

  • Web Services General Message Codes

    This section provides describes the web service response messages/codes you can expect to see for both successful and unsuccessful web service responses. Each Universal MPI web service response includes some common fields that can help clients interpret...

  • Web Service Success Messages

    The following table describes the message string in the web service response when the web service executes successfully. In all of these cases: The success Boolean will be set to true in the web service response The HTTP status code will be 200. The s...

  • Web Service Error Messages

    Unsuccessful Universal MPI web service requests will return typical 400/500 HTTP status codes for client or server errors, depending on the situation. Examples could include common status codes such as 401 (Unauthorized), 404 (Not Found), 500 (Internal ...

  • Troubleshooting API Connectivity with Postman

    Often, connectivity problems result in a general "SSL handshake error", which can be caused by various errors related to a mutual TLS Authentication failure. This article described how to test and verify connectivity using Postman -- an API client that ...