error.json

{
    "$schema":     "http://json-schema.org/draft-04/schema#",
    "title":       "HTTP Error Response Object",
    "description": "A description of the error encountered when attempting to service an HTTP request.",
    "type":        "object",
    "properties": {
        "message": {
            "description": "A human-readable message explaining the error",
            "type": "string"
        },
        "issue_kind": {
            "description": "A unique label to identify the error class",
            "type": "string"
        },
        "stacktrace": {
            "description": "For 5xx responses only, a ruby stacktrace to where an error occurred.",
            "type": "array",
            "items": { "type": "string" }
        }
    },
    "required": ["message", "issue_kind"],
    "additionalProperties": false
}