# `PATCH /supplier/{id}`

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

Update supplier

Renames a supplier for the selected company.

## Path parameters

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

## Body (JSON)

| Field | Required | Type | Description |
|-------|----------|------|-------------|
| `name` | yes | string |  |

```json
{
  "name": "Großhandel Müller GmbH"
}
```

## Response `200`

Updated supplier

```json
{
  "supplier": {
    "id": 1,
    "name": "…",
    "createdAt": "2026-08-10T00:00:00.000Z",
    "updatedAt": "2026-08-10T00:00:00.000Z"
  }
}
```

## Errors

| Status | Description |
|--------|-------------|
| 400 | Name required, invalid id, or no company selected — `{"error":"…"}` |
| 401 | Unauthorized — `{"error":"…"}` |
| 403 | Not authorized — `{"error":"…"}` |
| 404 | Supplier or company not found — `{"error":"…"}` |

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