idempotency.key_required — Idempotency-Key header required

HTTP status: 400
Retryable: no — change the request or the flow first

When it happens

This endpoint creates something that must never happen twice (a booking, a ticket), so it requires an Idempotency-Key header.

What to do

Send a unique value (a UUID is ideal) in Idempotency-Key. Reuse the same value when you retry the same operation.

Example response

{
  "type": "https://quickota.com/developers/errors/idempotency.key_required",
  "title": "Idempotency-Key header required",
  "status": 400,
  "code": "idempotency.key_required",
  "detail": "This endpoint creates something that must never happen twice (a booking, a ticket), so it requires an \u0060Idempotency-Key\u0060 header.",
  "suggestion": "Send a unique value (a UUID is ideal) in \u0060Idempotency-Key\u0060. Reuse the same value when you retry the same operation.",
  "retryable": false,
  "requestId": "req_7f3a2c9e41d0b8a6c5e21f90"
}

See Errors for how to handle errors in general.