mailboxlayer Error Response

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://github.com/api-evangelist/mailboxlayer/blob/main/json-schema/mailboxlayer-error-schema.json",
  "title": "mailboxlayer Error Response",
  "description": "Error envelope returned by mailboxlayer when a request fails. HTTP status is always 200; check the success flag and the error.code value.",
  "type": "object",
  "properties": {
    "success": {
      "type": "boolean",
      "const": false,
      "description": "Always false for error responses."
    },
    "error": {
      "type": "object",
      "properties": {
        "code": {
          "type": "integer",
          "enum": [101, 103, 104, 105, 106, 210, 211],
          "description": "Numeric mailboxlayer error code."
        },
        "type": {
          "type": "string",
          "enum": [
            "invalid_access_key",
            "invalid_api_function",
            "usage_limit_reached",
            "https_access_restricted",
            "inactive_user",
            "no_email_address_supplied",
            "invalid_email_address"
          ],
          "description": "Machine-readable error identifier."
        },
        "info": {
          "type": "string",
          "description": "Human-readable error description."
        }
      },
      "required": ["code", "type", "info"],
      "additionalProperties": false
    }
  },
  "required": ["success", "error"],
  "additionalProperties": false
}