# UsageRow

> The UsageRow object in the Guv API.

## Fields

| Field | Type | Description |
| --- | --- | --- |
| `start` * | string (date-time) |  |
| `environment_id` | string or null |  |
| `service_id` | string or null |  |
| `subject` | [ResourceRef](/docs/api/objects/resource-ref/) or any or null |  |
| `metric` * | [UsageMetric](/docs/api/objects/usage-metric/) |  |
| `quantity` * | string |  |
| `unit` * | string |  |
| `cost` * | [Money](/docs/api/objects/money/) |  |

\* always present

## Example

```json
{
  "start": "2026-10-22T13:05:00Z",
  "environment_id": "string",
  "service_id": "string",
  "subject": {
    "type": "service",
    "id": "svc_01jbx2m9k7q4r8t5v6w3y0z1sv",
    "name": "web",
    "url": "/v1/projects/primecarers/services/web"
  },
  "metric": "vcpu_seconds",
  "quantity": "string",
  "unit": "string",
  "cost": {
    "amount": "7.42",
    "currency": "GBP",
    "display": "£7.42"
  }
}
```