--- title: Skew description: Option summary skew via the Kiyotaka Data API. Advanced tier only. --- # Skew Skew summary data for option markets. The current public API shape is a single summary series selected by `exchange`, `coin`, `rawSymbol`, and `tenor`. In practice this is useful for option summary series such as `BTC_25`, where the raw symbol selects the skew flavor and the tenor selects the expiry bucket. ## Parameters | Parameter | Type | Required | Description | | --- | --- | --- | --- | | `exchange` | string | Yes | Use the option venue that exposes the summary series. The current public example uses `DERIBIT`. | | `coin` | string | Yes | Underlying asset, for example `BTC`. | | `rawSymbol` | string | Yes | Summary symbol, for example `BTC_25`. | | `tenor` | Tenor | Yes | Option summary tenor, for example `ONE_W`. | Use `GET /v1/markets` to discover available summary symbols and tenors before querying. ## Response fields | Field | Type | Description | | --- | --- | --- | | `skew` | double | Skew summary value for the requested series | | `timestamp` | Timestamp | Start of the returned interval bucket | ## Capabilities | Feature | Supported | Details | | --- | --- | --- | | Summary series queries | Yes | Query by `exchange`, `coin`, `rawSymbol`, and `tenor` | | Multi-exchange aggregation | No | | ## Examples ### One-week BTC skew Fetches 7 days of daily BTC skew data for the one-week tenor. 
curl "https://api.kiyotaka.ai/v1/points
    ?type=SKEW_OPTION_SUMMARY_AGG
    &exchange=DERIBIT
    &coin=BTC
    &rawSymbol=BTC_25
    &tenor=ONE_W
    &interval=DAY
    &from=1775635290
    &period=604800" \\
  -H "X-Kiyotaka-Key: YOUR_API_KEY"
 
import requests


response = requests.get(
    "https://api.kiyotaka.ai/v1/points?type=SKEW_OPTION_SUMMARY_AGG&exchange=DERIBIT&coin=BTC&rawSymbol=BTC_25&tenor=ONE_W&interval=DAY&from=1775635290&period=604800",
    headers={"X-Kiyotaka-Key": "YOUR_API_KEY"}
)
data = response.json()
 
const response = await fetch(
  "https://api.kiyotaka.ai/v1/points?type=SKEW_OPTION_SUMMARY_AGG&exchange=DERIBIT&coin=BTC&rawSymbol=BTC_25&tenor=ONE_W&interval=DAY&from=1775635290&period=604800",
  { headers: { "X-Kiyotaka-Key": "YOUR_API_KEY" } }
)
const data = await response.json()
 ### Response 
{
  "series": [
    {
      "id": {
        "type": "SKEW_OPTION_SUMMARY_AGG",
        "exchange": "DERIBIT",
        "rawSymbol": "BTC_25",
        "normalizedSymbol": "BTC",
        "category": "OPTION",
        "interval": "DAY",
        "tenor": "ONE_W",
        "coin": "BTC"
      },
      "points": [
        {
          "Point": {
            "skew": 9.71701017415855,
            "timestamp": { "s": 1775692800 }
          }
        }
      ]
    }
  ]
}