# Confirm shipment reservation

> `POST https://api.kustom.co/shipment/{shipment_id}/confirm`

This operation confirms the previously created shipment reservation (`POST -> /shipment`).

After the last `POST /shipment` or `PUT /shipment/{id}` call, one of two things can happen:

*   If the purchase goes through, this endpoint is called. The call is guaranteed to happen within an hour of the last call to `POST /shipment` or `PUT /shipment/{id}`. In most cases, the call to this endpoint will come within seconds.
*   If the purchase does not go through, this endpoint is never called. If an hour has passed since the last call to `POST /shipment` or `PUT /shipment/{id}`, it is safe to remove the reservation of the shipment.

A HTTP 401 error code will trigger an auth call. Any other HTTP response will be ignored as this is a best effort call without any possibility for consumer interaction.

## Parameters

- `shipment_id` (string, path, required) — Unique shipment ID
- `Authorization` (string, header, required) — Authorization token on format `Bearer <token>`.

## Responses

### 200

Successful operation.

### 401

Invalid or expired token. A new token will be obtained.