> ## Documentation Index
> Fetch the complete documentation index at: https://docs.allium.so/llms.txt
> Use this file to discover all available pages before exploring further.

# Check entry

> Checks whether a value exists in a dataset.

Checks whether a specific value exists in the dataset.

**Path parameters:**

| Parameter    | Description |
| :----------- | :---------- |
| `dataset_id` | Dataset ID  |

**Query parameters:**

| Parameter | Required | Description          |
| :-------- | :------- | :------------------- |
| `value`   | Yes      | The value to look up |

```bash theme={null}
curl -X GET "https://api.allium.so/api/v1/beam/datasets/${DATASET_ID}/entries/check?value=0x3c499c542cef5e3811e1192ce70d8cc03d5c3359" \
  -H "X-API-Key: ${ALLIUM_API_KEY}"
```

**Response:**

```json theme={null}
{ "exists": true }
```