# Check whether a project has spans

**GET** `/v1/private/spans/exists`

Returns whether the project has at least one span matching the given scope. Cheap existence probe (LIMIT 1) used to drive empty-state decisions without scanning or aggregating the whole project.

Base URL: `https://www.comet.com/opik/api`

Tags: `Spans`

## Authorization

This operation requires no authorization.

## Query parameters

| Name | Type | Required | Description |
| --- | --- | --- | --- |
| `project_id` | `string` (uuid) | No | — |
| `project_name` | `string` | No | — |
| `source` | `string` | No | — |

## Responses

| Status | Description | Media type |
| --- | --- | --- |
| `200` | Span existence | `application/json` |

### Example response: 200 — Span existence

```json
{
  "exists": true
}
```

## Related pages

- [Activate a pairing session](./activatepairingsession.md)
- [Add blueprint to existing config](./updateagentconfig.md)
- [Add items to annotation queue](./additemstoannotationqueue.md)
- [Add span comment](./addspancomment.md)
- [Add span feedback score](./addspanfeedbackscore.md)
- [Add thread comment](./addthreadcomment.md)
- [Add trace comment](./addtracecomment.md)
- [Add trace feedback score](./addtracefeedbackscore.md)
- [Agent Configs](./tags/agent-configs.md)
- [Agent Insights](./tags/agent-insights.md)

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