Works with CME index futures. Pass ES=F or NQ=F and URL-encode the = as %3D - e.g. /v1/exposure/summary/ES%3DF. Options-on-futures are priced with Black-76 using the CME multiplier ($50/pt ES, $20/pt NQ); CME index futures are Growth-tier. See the futures hub.

Endpoint

GET /v1/exposure/summary/{symbol}

Auth required (X-Api-Key) Rate Limited: Yes Growth plan+

Parameters

Name	In	Required	Default	Description
`symbol`	path	yes	-	Underlying symbol

curl -H "X-Api-Key: YOUR_API_KEY" \
  "https://lab.flashalpha.com/v1/exposure/summary/SPY"

import requests

resp = requests.get(
    "https://lab.flashalpha.com/v1/exposure/summary/SPY",
    headers={"X-Api-Key": "YOUR_API_KEY"}
)
data = resp.json()
print(f"Regime: {data['regime']}")
print(f"Net GEX: ${data['exposures']['net_gex']:,.0f}")

const resp = await fetch(
  "https://lab.flashalpha.com/v1/exposure/summary/SPY",
  { headers: { "X-Api-Key": "YOUR_API_KEY" } }
);
const data = await resp.json();
console.log(`Regime: ${data.regime}`);
console.log(`Net GEX: $${data.exposures.net_gex.toLocaleString()}`);

API Key

Response

{
  "symbol": "SPY",
  "underlying_price": 597.505,
  "as_of": "2026-02-28T16:30:45Z",
  "gamma_flip": 595.25,
  "regime": "positive_gamma",
  "exposures": {
    "net_gex": 2850000000,
    "net_dex": -450000000,
    "net_vex": 1200000000,
    "net_chex": 850000000
  },
  "interpretation": {
    "gamma": "Dealers long gamma  -  expect range-bound, mean-reverting price action",
    "vanna": "Positive vanna  -  benefits from vol compression",
    "charm": "Time decay favors dealers  -  supports decline into close"
  },
  "hedging_estimate": {
    "spot_down_1pct": { "dealer_shares_to_trade": 4780000, "direction": "BUY", "notional_usd": 2852000000 },
    "spot_up_1pct": { "dealer_shares_to_trade": -4780000, "direction": "SELL", "notional_usd": 2852000000 }
  },
  "zero_dte": { "net_gex": 285000000, "pct_of_total_gex": 10.0, "expiration": "2026-02-28" }
}

Key Response Fields

Field	Type	Description
`symbol`	string	Underlying symbol
`underlying_price`	number	Current price of underlying
`as_of`	string	ISO 8601 timestamp
`gamma_flip`	number	Strike where net GEX crosses zero - the gamma flip point
`regime`	string	Gamma regime: `positive_gamma`, `negative_gamma`, or `undetermined`
`exposures`	object	Aggregate exposure values - GEX, DEX, VEX, and CHEX
`interpretation`	object	Plain-English interpretations for gamma, vanna, and charm
`hedging_estimate`	object	Estimated dealer hedging for ±1% spot moves, including share count, direction, and notional USD
`zero_dte`	object	Same-day (0DTE) exposure breakdown: net GEX, percentage of total, and expiration date

What Is the Exposure Summary?

The Summary endpoint returns a complete options exposure overview in a single API call. Instead of querying GEX, DEX, VEX, and CHEX separately, you get all four aggregate values plus the current gamma regime (positive, negative, or undetermined), plain-English interpretations for each metric, dealer hedging estimates for ±1% spot moves, and the percentage contributed by same-day (0DTE) options. This is the most efficient endpoint for building dashboards or monitoring tools.

Common Use Cases

Populate a one-call dashboard - read exposures.net_gex, net_dex, net_vex, and net_chex in a single request to fill an entire exposure panel instead of querying four endpoints
Gate strategy on the regime - branch on regime (positive_gamma vs negative_gamma): run mean-reversion when dampened, momentum when amplified
Size hedging impact - pull hedging_estimate.spot_down_1pct.dealer_shares_to_trade and direction to gauge how much dealers buy or sell on a 1% move
Anchor levels off the flip - use gamma_flip as the pivot that separates the dampening zone above from the amplifying zone below
Trigger regime-change alerts - fire when regime flips or net_gex crosses zero, then attach the interpretation strings as ready-made alert context
Track same-day risk - watch zero_dte.pct_of_total_gex to know how much of exposure expires today and adjust intraday expectations
Snapshot for history - store the as_of timestamp with each pull to build a regime and exposure time series

Complementary endpoints

Narrative - turn the same exposure snapshot into a plain-English briefing
Key Levels - gamma flip, call wall, put wall, and max pain in one call
Gamma Exposure (GEX) - the per-strike breakdown behind the aggregate net GEX
VRP - pair the regime read with the volatility risk premium

Exposure Summary API