For details on how you can authenticate with the API service check Authentication.

This error will trigger the browser's authentication dialog, unless the AJAX mode is used (i.e., the X-Requested-With HTTP header is set to XMHTTPRequest).


  • Authentication credentials, that were used in the API request, are invalid


  • Check the authentication credentials, that you used in the API request
  • Make sure, that the signature is generated properly, if you used a signature-based authentication scheme


    "status": 401,
    "errors": [
            "code": "AUTHENTICATION_FAILED",
            "message": "Used authentication credentials are invalid or signature verification failed",
            "more_info": ""