# Check idempotency key

Checks if an idempotency key has been used before.

Requires JWT token authentication in the Authorization header.

Returns 200 if key exists, 404 if not.

Endpoint: HEAD /api/control/production/records/check-idempotency
Version: 2.0.0
Security: bearerAuth

## Query parameters:

  - `key` (string, required)
    Idempotency key to check
    Example: "client:6507f1e3c9d8e2a4b1f9c3d5:JS0315:evt_1234567890abcdef"


## Response 200 fields

## Response 401 fields

## Response 404 fields

## Response 500 fields