Error Codes

If an API call cannot reach the Walmart gateway, a basic HTTP error code (such as 503 Service Unavailable) is returned. However, a complete error response object is returned if the gateway is reached.

The table below shows the currently supported error code responses.

The first parameter provides the error description.
The second parameter shows the HTTP status code.
The third parameter specifies the error category.
The fourth parameter specifies the error severity.
The fifth parameter specifies whether the error response includes a field tag.

Error Code	HTTP Status	Category	Severity	Field Included
SOME_CONTENT_NOT_FOUND	206	Application	Info	false
INVALID_REQUEST	400	Data	Error	true
INVALID_REQUEST_HEADER	400	Data	Error	true
INVALID_REQUEST_PARAM	400	Data	Error	true
INVALID_REQUEST_CONTENT	400	Data	Error	true
MISSING_REQUEST_HEADER	400	Data	Error	true
MISSING_REQUEST_PARAM	400	Data	Error	true
MALFORMED_REQUEST_CONTENT	400	Data	Error	true
UNAUTHORIZED	401	Data	Error	false
FORBIDDEN.GMP_GATEWAY_API	403	Data	Error	false
CONTENT_NOT_FOUND	404	Application	Info	false
URI_NOT_FOUND	404	Data	Error	false
METHOD_NOT_ALLOWED	405	Data	Error	false
INVALID_ACCEPT_TYPE	406	Application	Error	false
UNSUPPORTED_MEDIA_TYPE	415	Data	Error	false
RESOURCE_IS_LOCKED.GMP_RECEIVER_API	423	Application	Error	false
REQUEST_THRESHOLD_VIOLATED	429	Request	Error	false
INVALID_SYSTEM_STATE	500	System	Error	false
SYSTEM_ERROR	500	System	Error	false
DOWNSTREAM_SYSTEM_TIME_OUT	504	System	Error	false

For example, the last error object on the right contains an INVALID_REQUEST_HEADER error encountered when invoking the GMP_ORDER_API. The error is a DATA ERROR in the WM_QOS. The CORRELATION_ID field (a request header) is null or blank.