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GET
/
v1
/
underlying
/
{ticker}
/
chain
Option chain snapshot
curl --request GET \
  --url https://flow-api.skylit.ai/v1/underlying/{ticker}/chain \
  --header 'Authorization: Bearer <token>'
{
  "data": {
    "ticker": "<string>",
    "expiration": "2023-12-25",
    "underlyingPrice": 123,
    "strikes": [
      {
        "strike": 123,
        "callVolume": 1,
        "callPremium": 123,
        "callOi": 1,
        "callLastPrice": 123,
        "putVolume": 1,
        "putPremium": 123,
        "putOi": 1,
        "putLastPrice": 123,
        "callIv": 123,
        "putIv": 123
      }
    ]
  },
  "meta": {
    "timestamp": "2023-11-07T05:31:56Z",
    "requestId": "d7574836"
  }
}

Authorizations

​
Authorization
string
header
required

Skylit API key in the Authorization header (Authorization: Bearer fs_live_<key>). X-API-Key is also accepted.

Path Parameters

​
ticker
string
required

Underlying ticker symbol (uppercase, e.g. SPY, AAPL).

Example:

"SPY"

Query Parameters

​
expiration
string<date>
required

Expiration date (YYYY-MM-DD).

Example:

"2026-08-21"

​
minVolume
integer

Suppress strikes whose total (call+put) volume is below this floor.

Required range: x >= 0
​
date
string<date>

Trading date the request targets, in YYYY-MM-DD. Defaults to the current trading date (the most recent session that has settled enough data to be queryable). Past dates fall through to the daily rollup tables.

Example:

"2026-05-27"

Response

Chain snapshot.

​
data
object
required
​
meta
object
required