# `PATCH /carrier/{id}`

Protected. Requires a valid session cookie (`credentials: 'include'`).

Update carrier

Updates carrier name, sort order, hasPackages, and/or isReverse for the selected company.

## Path parameters

| Param | Required | Type | Description |
|-------|----------|------|-------------|
| `id` | yes | integer | Carrier ID |

## Body (JSON)

| Field | Required | Type | Description |
|-------|----------|------|-------------|
| `name` | no | string |  |
| `sort` | no | integer |  |
| `hasPackages` | no | boolean |  |
| `isReverse` | no | boolean |  |

```json
{
  "name": "…",
  "sort": 1,
  "hasPackages": true,
  "isReverse": true
}
```

## Signals

On success, emits SSE signal: `carrier` (see [`GET /events`](../events.md)).

## Response `200`

Updated carrier

```json
{
  "carrier": {
    "id": 1,
    "name": "…",
    "sort": 1,
    "hasPackages": true,
    "isReverse": true
  }
}
```

## Errors

| Status | Description |
|--------|-------------|
| 400 | Invalid input or missing fields — `{"error":"…"}` |
| 401 | Unauthorized — `{"error":"…"}` |
| 403 | Not authorized — `{"error":"…"}` |
| 404 | Carrier not found — `{"error":"…"}` |
| 409 | Carrier already exists — `{"error":"…"}` |

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