Interface RequestOptions

Idempotency key for safe retries on mutation requests (POST, PUT, PATCH, DELETE). The API deduplicates requests sharing the same key within a 24-hour window — the first request executes normally and its response is stored; subsequent retries with the same key replay the stored response without re-executing.

• Ignored on GET/HEAD requests (they are naturally idempotent).
• Ignored on multipart/file-upload endpoints.
• Must be ≤255 printable ASCII characters.
• A conflict (another request with the same key still in flight) returns a 409 error whose ContioAPIError.retryAfter field indicates when to retry.

Use crypto.randomUUID() to generate a unique key per logical operation and reuse that same key on every retry of that operation.

Override the default timezone for this request. Can be an IANA identifier (e.g., 'America/New_York') or a timezone abbreviation (e.g., 'EST', 'PST').