# Token volatility index

- Method: `GET`
- Path: `/token/{id}/volatility-index`
- Tier: Pro
- HTML docs: https://docs.hiddensystems.ai/nebula/reference/get-token-id-volatility-index/
- Interactive docs: https://docs.hiddensystems.ai/nebula/#endpoint=get-token-id-volatility-index

## Description

Volatility index time-series for the token.

## cURL Example

```bash
curl --request GET \
  --url 'https://nebula-api.hiddensystems.ai/api/v1/public/token/bitcoin/volatility-index' \
  --header 'X-API-Key: YOUR_API_KEY'
```

## Path Parameters

- `id` (string, required): Token identifier. Accepts internal token_id (integer) or coingecko_id (string, e.g. bitcoin).

## Query Parameters

- `hours` (integer, optional): Lookback window in hours.
- `granularity` (string, optional): Optional bucket size override. Only `1d` is supported for this endpoint.

## Response

OK

- `volatility` (array<object>): Token volatility index series.
- `volatility[].time` (string (date-time)): UTC timestamp for the data point.
- `volatility[].value` (number (double)): Numeric metric value for the timestamp.

Media type: `application/json`

## JSON Response

```json
{
  "volatility": [
    {
      "time": "2026-01-15T12:00:00Z",
      "value": 0
    }
  ]
}
```