The request was well-formed but semantically invalid. Check the errors array for field-level details.
Category
validation
Retryable?
No. Fix the validation errors and retry.
Example
{
"type": "https://developer.gett-tech.com/errors/VALIDATION_FAILED",
"title": "Unprocessable Entity",
"status": 422,
"detail": "Validation failed.",
"instance": "/v1/marketplace/orders/validate",
"requestId": "req_abc123",
"timestamp": "2026-03-11T14:30:00.000Z",
"errorCode": "VALIDATION_FAILED",
"errorCategory": "validation",
"retryable": false,
"errors": [
{
"code": "MODIFIER_REQUIRED",
"message": "Required modifier group 'Size' has no selection.",
"itemId": "item_xyz"
}
]
}