# `GET /entity/next-number`

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

Peek next customer number

Returns the next customer number that would be allocated (`type` entity)
without consuming it. Use on the customer add form.


## Response `200`

Next number

```json
{
  "number": "…"
}
```

## Errors

| Status | Description |
|--------|-------------|
| 400 | No company selected — `{"error":"…"}` |
| 401 | Unauthorized — `{"error":"…"}` |
| 403 | Not authorized — `{"error":"…"}` |
| 404 | Company not found — `{"error":"…"}` |

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