1. API
  2. Gamma exposure
  3. Gamma exposure

Gamma exposure API, GET /gex/{ticker}

Where is SPY's gamma flip today and which strikes hold the most dealer gamma?

Dealer gamma exposure by strike, the flip level, the walls and a regime read. Returns total, call and put gamma exposure, the gamma flip, the call and put walls and key strike, the per-strike profile, a per-expiration breakdown and an implications block that names the regime. Compact detail windows the lists around spot.

Run it on your ticker Download as Markdown Copy for your AI
PremiumPlan and above, from $55/mo
1MCP tool that calls it
2026-09-08Sample captured from the live endpoint

The answer, in one call

Units first,
then the request.

total_gex, call_gex, put_gex and gex per strike are dollars of gamma per 1% move; total_gex_billions is the same in billions. Strikes and levels are dollars.

Dealer convention: dealers are long customer-sold calls and short customer-bought puts. Aggregated across the expirations listed in expirations_selected.

curlBearer token from Account, then API Access
curl -H "Authorization: Bearer avmcp_YOUR_TOKEN" \
     "https://apexvol.com/api/mcp/data/gex/SPY?detail=compact&strikes_around=8"
Pythonrequests, nothing else
import requests

headers = {"Authorization": "Bearer avmcp_YOUR_TOKEN"}
params = {"detail": "compact", "strikes_around": "8"}
r = requests.get("https://apexvol.com/api/mcp/data/gex/SPY", headers=headers, params=params)
r.raise_for_status()
data = r.json()["data"]
print(data["total_gex_billions"])
In Claude, Cursor or ChatGPTthrough the MCP server, no code
You

Where is the gamma flip on SPY right now?

The assistant calls get_gex and answers from the JSON below.

Tokens come with every paid or trial plan. Sign in and create one under Account, then API Access, or start a trial. Your ticker, your budget.

GET /api/mcp/data/gex/SPY?detail=compact&strikes_around=8200, application/json, captured 2026-09-08
{
  "success": true,
  "data": {
    "by_expiration": [
      {
        "call_gex": 1132995456.8335,
        "expiration": "2026-09-08",
        "flip_level": null,
        "max_gamma_strike": 770,
        "min_gamma_strike": 771,
        "put_gex": -1178772712.3059,
        "stock_price": 770.25,
        "total_gex": -45777255.4724
      },
      {
        "call_gex": 631787389.7441,
        "expiration": "2026-09-09",
        "flip_level": null,
        "max_gamma_strike": 766,
        "min_gamma_strike": 769,
        "put_gex": -735739062.8266,
        "stock_price": 770.25,
        "total_gex": -103951673.0825
      },
      {
        "call_gex": 488040962.8352,
        "expiration": "2026-09-10",
        "flip_level": 777.7584,
        "max_gamma_strike": 775,
        "min_gamma_strike": 770,
        "put_gex": -396093609.9746,
        "stock_price": 770.25,
        "total_gex": 91947352.8606
      }
    ],
    "call_gex": 12388200841.1688,
    "expirations_horizon_days": 90,
    "expirations_included": 16,
    "expirations_selected": [
      "2026-09-08",
      "2026-09-09",
      "2026-09-10"
    ],
    "expirations_through": "2026-11-20",
    "expirations_total": 32,
    "flip_degenerate": false,
    "flip_level": null,
    "gamma_flip": null,
    "gex_by_strike": [
      {
        "gex": -133889311.3072,
        "oi": 27515,
        "strike": 769
      },
      {
        "gex": -52445836.8019,
        "oi": 121480,
        "strike": 770
      },
      {
        "gex": -73315508.5296,
        "oi": 23312,
        "strike": 771
      }
    ],
    "gex_profile": [
      {
        "call_gex": 237808150.3447494,
        "net_gex": -133889311.30720633,
        "put_gex": -371697461.6519557,
        "strike": 769
      },
      {
        "call_gex": 980618910.3369881,
        "net_gex": -52445836.80189216,
        "put_gex": -1033064747.1388803,
        "strike": 770
      },
      {
        "call_gex": 253439508.7709778,
        "net_gex": -73315508.52959651,
        "put_gex": -326755017.3005743,
        "strike": 771
      }
    ],
    "gex_ratio": 0.7932,
    "implications": {
      "directional_bias": "Balanced (call/put GEX 0.79)",
      "net_to_gross": -0.1153,
      "pin_at_spot": false,
      "positioning": "largest strike $760.00 (-1.3%); call wall $775.00 (+0.6%); put wall $760.00 (-1.3%)",
      "regime_code": "negative",
      "support_resistance": "--",
      "volatility_regime": "Negative GEX (dealers amplify moves)"
    },
    "key_levels": {
      "call_wall": 775.0,
      "call_wall_unconstrained": false,
      "call_wall_value": 969364047.7614,
      "flip_degenerate": false,
      "flip_level": null,
      "key_strike": 760.0,
      "key_strike_net": 1376738203.7852,
      "max_pain": null,
      "put_wall": 760.0,
      "put_wall_unconstrained": false,
      "put_wall_value": 1809628588.0631,
      "spot": 770.25
    },
    "max_gex_strike": 760,
    "put_gex": -15618693641.3721,
    "stock_price": 770.25,
    "ticker": "SPY",
    "total_gex": -3230492800.2033,
    "total_gex_billions": -3.2305,
    "window": {
      "detail": "compact",
      "lists": {
        "gex_by_strike": {
          "rows_returned": 17,
          "rows_total": 329,
          "truncated": true
        },
        "gex_profile": {
          "rows_returned": 17,
          "rows_total": 329,
          "truncated": true
        }
      },
      "strikes_around": 8
    }
  }
}

Every response is wrapped as {"success": true, "data": {...}}. Lists in the sample are cut to a few rows so it fits on a page; the shape is exactly what your code receives.

Parameters

Bounded,
and the bounds are stated.

Out-of-range numbers are clamped to the documented range, never silently changed to something else. A missing required field returns 400 with the reason.

NameInDefaultRangeMeaning
ticker requiredpathany covered symbolThe underlying, upper case. Use /search to check coverage.
expirationquerynearestYYYY-MM-DD, a listed expirationWhich expiration to use. Defaults to the nearest one.
aggregatequeryTruetrue or falseSum across expirations or one only.
detailqueryfull for REST, compact for MCP clientscompact or fullWindowed lists or everything.
strikes_aroundquery250 for allStrikes per side under compact.

Field by field

What each
number means.

total_gex_billions, call_gex, put_gex, gex_ratio
The headline exposure.
flip_level, gamma_flip, flip_degenerate
Where net gamma changes sign, or null when it does not.
key_levels.call_wall, put_wall, key_strike, spot
The levels traders watch.
gex_by_strike[].strike, gex, oi
The profile.
implications.volatility_regime, positioning, directional_bias
The regime in words.
window
What compact detail trimmed.

Access, limits, errors

Before the
first call.

Plan
Premium Premium and above. Tokens are issued to paid and trial accounts from $55 a month; each endpoint follows the tier of its web feature. An endpoint above your plan answers 402 and names the plan it needs.
Auth
Bearer token, prefix avmcp_, created under Account, then API Access. Shown once, hashed at rest, rotates in one click. Always call https://apexvol.com, never www.
Limits
60 requests a minute and 1,000 an hour per token, plus a monthly allowance by plan. Every response carries the remaining counts in X-RateLimit-* headers; a 429 carries Retry-After in seconds.
Errors
401 no or revoked token; 429 Retry-After seconds; 403 Premium plan required; 424 data feed unavailable, retry. The full list with payload shapes is on the errors page.
Since
API 1.0. Units, bases and timestamps follow the conventions shared by every endpoint; changes are logged in the API changelog.
Machine-readable
This page as Markdown, the family as one file, the whole API as llms-full.txt or OpenAPI 3.1.

The same data, in plain English

Ask for it
in an MCP client.

Connect the ApexVol MCP server and the assistant calls get_gex by name. One URL, a sign-in, no token to paste.

Prompts that hit this endpointcopy one into Claude, Cursor or ChatGPT
You

Where is the gamma flip on SPY right now?

You

Which SPY strikes are the call wall and put wall today?

You

Is QQQ in positive or negative gamma?

More in the prompt library. Set the server up in Claude Desktop, Claude Code, Cursor, ChatGPT, VS Code, Windsurf or Gemini CLI.

Next

The rest of the family,
and the explainer behind it.

Gamma exposure APINet gamma exposure across the book, the strikes that pin it, the level where dealers flip from dampening moves to chasing them, and the same picture for zero-DTE. Returned as arrays, ready to chart. Gamma Exposure (GEX) ExplainedGamma exposure explained: how dealer GEX positioning drives intraday volatility, pin zones, and positive vs negative gamma regimes. get_gex in an MCP clientPrompts for Claude, Cursor and ChatGPT that call this tool.

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