> For the complete documentation index, see [llms.txt](https://developer.paddle.com/llms.txt).

# Invalid operator

The filter operator you used isn't valid for this field's type.

---

## Example

```json
{
  "error": {
    "type": "request_error",
    "code": "invalid_operator",
    "detail": "The filter operator 'gt' is not valid for field 'country'.",
    "documentation_url": "https://developer.paddle.com/errors/metrics/invalid_operator"
  },
  "meta": {
    "request_id": "00000000-0000-0000-0000-000000000000"
  }
}
```

## Details

| Attribute | Value |
| --- | --- |
| Status code | 400 |
| Error code | `invalid_operator` |
| Error message | The filter operator '%s' is not valid for field '%s'. |

## Common causes

- The filter `op` isn't supported for the field's type.

## Common solutions

- Use an operator that's valid for the field. Only `in` is supported at the moment, and the operators available for each dimension are listed against `filter_ops` in the [list Explore metric entities](https://developer.paddle.com/api-reference/metrics/list-explore-metric-entities) response.