Options · Order flow

Options flow by strike

Call and put premium and volume at every strike, by aggressor class.

GET/v1/options/flow/by-strikeoptionsFlowByStrike

API Developer Overnight data: API Pro Streamable MCP tool: options_flow_by_strike History-bounded Dataset: options

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Example request
Parameters
Response
Example response
Related

For each strike, the premium and volume of calls and puts split into ask side, bid side, mid and unknown, the net premium (ask side minus bid side) and the open interest, with the underlying price and session totals. All expirations of the underlying are included unless date_of_expiry or the DTE bounds narrow them. Strikes without prints in the window are not listed.

Example request

curl -sS --get "https://api.ordermap.si/v1/options/flow/by-strike" \
  -H "Authorization: Bearer $ORDERMAP_API_KEY" \
  --data-urlencode underlying_symbol=SPXW

const params = new URLSearchParams({
  underlying_symbol: "SPXW",
});
const res = await fetch(`https://api.ordermap.si/v1/options/flow/by-strike?${params}`, {
  headers: { Authorization: `Bearer ${process.env.ORDERMAP_API_KEY}` },
});
if (!res.ok) throw new Error(`${res.status} ${await res.text()}`);
const { data, meta } = await res.json();
console.log(data, meta.coverage);

Set ORDERMAP_API_KEY to your key. Replace the dates with a recent trading date.

Parameters

19 parameters, 1 required.

Parameter	Type and limits	Description
`underlying_symbol`queryrequired	stringat most 8 characterspattern ^[A-Za-z][A-Za-z0-9.]{0,7}$	Option root or family: SPX covers the SPX and SPXW roots, SPXW only the weekly root, QQQ, NDXP, RUTW, XSP ...
`date`queryoptional	stringdate	Trading date (YYYY-MM-DD). Default: the current session, else the most recent completed one. Overnight prints belong to the next trading date.
`session`queryoptional	stringrthgthalldefault rth	Trading session: rth is the regular session, gth the overnight (global trading hours) session before the trading date, all both. Overnight data requires the Pro plan and exists only for underlyings with an overnight session; GET /v1/options/sessions shows which.
`contract_type`queryoptional	stringcallput	Calls or puts. Omit for both.
`date_of_expiry`queryoptional	stringdate	Only contracts expiring on this date.
`min_dte`queryoptional	integermin 0max 3650	Minimum days to expiration (0 = expires on the trading date).
`max_dte`queryoptional	integermin 0max 3650	Maximum days to expiration.
`min_premium`queryoptional	numbermin 0max 1000000000000	Minimum premium in US dollars of a print (price x size x multiplier).
`max_premium`queryoptional	numbermin 0max 1000000000000	Maximum premium in US dollars of a print.
`min_size`queryoptional	integermin 1max 1000000000	Minimum print size in contracts.
`max_size`queryoptional	integermin 1max 1000000000	Maximum print size in contracts.
`trade_type`queryoptional	array<string>comma-separated in one parametersweepblocksplitsinglegoldenmultilegcrossfloorauctioniso1 to 10 items	Comma-separated order types: sweep, block, split, single, golden, multileg, cross, floor, auction, iso. A print matches when any listed type applies. Sweeps and splits are inferred groupings, not exchange-confirmed.
`side`queryoptional	array<string>comma-separated in one parameterabove_askat_asknear_askaskmidnear_bidat_bidbidbelow_bidunknown1 to 10 items	Comma-separated aggressor classes: above_ask, at_ask, near_ask, mid, near_bid, at_bid, below_bid, unknown. ask selects at_ask and near_ask, bid selects near_bid and at_bid. at_ask without near_ask (and at_bid without near_bid) can be asked for only on /v1/options/trades and /v1/options/flow/overnight; elsewhere use ask and bid.
`sentiment`queryoptional	array<string>comma-separated in one parameterbullishbearishneutralunknown1 to 4 items	Comma-separated sentiments: bullish (calls bought or puts sold), bearish (puts bought or calls sold), neutral (traded at the mid) and unknown (direction not determinable).
`otm_only`queryoptional	boolean	Only out-of-the-money contracts (strike beyond the underlying price). Prints without a known underlying price are excluded.
`include_complex`queryoptional	boolean	Include multi-leg (complex order) prints. Default false.
`unusual_only`queryoptional	boolean	Only unusual activity: volume above open interest within 45 days, premium of at least $250,000, or an out-of-the-money sweep at the ask.
`min_strike`queryoptional	number> 0max 1000000	Lowest strike in dollars.
`max_strike`queryoptional	number> 0max 1000000	Highest strike in dollars.

Response

Status	Meaning	Body
`200`	Successful response.	Schema below
`400`	Invalid, unknown or repeated parameters, or an invalid cursor.	Error object
`401`	Missing or invalid API key.	Error object
`403`	The plan, dataset release or account state does not allow this request.	Error object
`422`	The request is valid but no data exists for it.	Error object
`429`	Rate limit, burst limit or cooldown; wait Retry-After seconds.Retry-After	Error object
`500`	Internal error.	Error object
`503`	Data temporarily unavailable; retry after Retry-After seconds.Retry-After	Error object
`504`	The request timed out.	Error object

Authenticated responses carry the X-RateLimit-* headers (see rate limits); 429 and 503 add Retry-After.

200 response body

dataobjectrequiredFlow by strike.37 fields inside
- sessionstringrequiredSession covered.rthgthcurball
- strikesarray<object>requiredStrikes with activity, ascending.27 fields inside
  - callobjectrequiredCall flow.11 fields inside
    ask_premiumnumberrequiredPremium at or near the ask.
    ask_volumeintegerrequiredContracts at or near the ask.
    bid_premiumnumberrequiredPremium at or near the bid.
    bid_volumeintegerrequiredContracts at or near the bid.
    mid_premiumnumberrequiredPremium around the mid.
    mid_volumeintegerrequiredContracts around the mid.
    net_premiumnumberrequiredask_premium minus bid_premium.
    premiumnumberrequiredPremium in US dollars.
    unknown_premiumnumberrequiredPremium of prints with unknown side.
    unknown_volumeintegerrequiredContracts with unknown side.
    volumeintegerrequiredContracts traded.
  - call_open_interestinteger | nullrequiredCall open interest.
  - putobjectrequiredPut flow.11 fields inside
    ask_premiumnumberrequiredPremium at or near the ask.
    ask_volumeintegerrequiredContracts at or near the ask.
    bid_premiumnumberrequiredPremium at or near the bid.
    bid_volumeintegerrequiredContracts at or near the bid.
    mid_premiumnumberrequiredPremium around the mid.
    mid_volumeintegerrequiredContracts around the mid.
    net_premiumnumberrequiredask_premium minus bid_premium.
    premiumnumberrequiredPremium in US dollars.
    unknown_premiumnumberrequiredPremium of prints with unknown side.
    unknown_volumeintegerrequiredContracts with unknown side.
    volumeintegerrequiredContracts traded.
  - put_open_interestinteger | nullrequiredPut open interest.
  - strikenumberrequiredStrike in dollars.
- totalsobjectrequiredTotals over every strike.4 fields inside
  - call_premiumnumberrequiredCall premium in US dollars.
  - net_call_premiumnumberrequiredCall ask side minus bid side.
  - net_put_premiumnumberrequiredPut ask side minus bid side.
  - put_premiumnumberrequiredPut premium in US dollars.
- trading_datestringdaterequiredTrading date.
- underlying_pricenumber | nullrequiredUnderlying price; null when unknown.
- underlying_symbolstringrequiredThe requested underlying.
metaobjectrequiredMeta object

Example response

{
  "data": {
    "session": "rth",
    "strikes": [
      {
        "call": {
          "ask_premium": 840000,
          "ask_volume": 1680,
          "bid_premium": 525000,
          "bid_volume": 1050,
          "mid_premium": 420000,
          "mid_volume": 840,
          "net_premium": 315000,
          "premium": 2100000,
          "unknown_premium": 315000,
          "unknown_volume": 630,
          "volume": 4200
        },
        "call_open_interest": 18200,
        "put": {
          "ask_premium": 128000,
          "ask_volume": 320,
          "bid_premium": 80000,
          "bid_volume": 200,
          "mid_premium": 64000,
          "mid_volume": 160,
          "net_premium": 48000,
          "premium": 320000,
          "unknown_premium": 48000,
          "unknown_volume": 120,
          "volume": 800
        },
        "put_open_interest": 9400,
        "strike": 6050
      }
    ],
    "totals": {
      "call_premium": 41200000,
      "net_call_premium": 6180000,
      "net_put_premium": 5070000,
      "put_premium": 33800000
    },
    "trading_date": "2026-10-16",
    "underlying_price": 6021.4,
    "underlying_symbol": "SPX"
  },
  "meta": {
    "as_of": 1760659200123,
    "coverage": {
      "complete": true
    },
    "delay_ms": 0,
    "delayed": false,
    "request_id": "0199f0c2-5a1e-7c3b-9d4e-2b6f8a1c3d5e",
    "source": "opra"
  }
}

Values are illustrative. Missing values are null, never 0.