{"uid":"cap_idjZTVGi_naQddvBuaYtD","slug":"bullflow-end-of-day-gex-gamma-exposure-data-d316954a","name":"Bullflow End-of-Day GEX (Gamma Exposure) Data","description":"Bullflow.io is a real-time unusual options flow and dark pool tracker with advanced tools to view, filter, and analyze market activity as it happens.","url":"https://api.bullflow.io/v1/data/eodGex?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["ticker"],"properties":{"date":{"type":"string","pattern":"^\\d{4}-\\d{2}-\\d{2}$","description":"Trading date in YYYY-MM-DD format."},"ticker":{"type":"string","examples":["SPY"],"description":"Underlying stock, ETF, or supported index ticker."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["ticker","spot_price","as_of","strikes","date","open_interest_date","timezone"],"properties":{"date":{"type":"string","description":"Selected trading date in YYYY-MM-DD format. Historical availability varies by ticker and session; unavailable history returns HTTP 404."},"as_of":{"type":"string","description":"Timestamp of the closing underlying price used in the snapshot, in UTC."},"ticker":{"type":"string"},"strikes":{"type":"array","items":{"type":"object","required":["expiration","strike","call_gex","put_gex","net_gex"],"properties":{"strike":{"type":"number","description":"Amount in US dollars."},"net_gex":{"type":"number"},"put_gex":{"type":"number"},"call_gex":{"type":"number"},"expiration":{"type":"string","description":"Option expiration date in YYYYMMDD format."}}},"description":"Call, put, and net GEX in USD per 1% underlying move, by strike and expiration."},"timezone":{"type":"string","const":"America/New_York"},"spot_price":{"type":"number","description":"Amount in US dollars."},"open_interest_date":{"type":"string","description":"Previous trading date whose closing positions are represented by the open interest reported for this session."}},"description":"End-of-day GEX using closing gamma and underlying price with the open interest reported for the selected session. GEX is in USD per 1% underlying move; calls are positive and puts negative."}}}}},"responseSchema":{"type":"json","example":{"date":"2026-10-14","as_of":"2026-10-14T20:00:00Z","ticker":"SPY","strikes":[{"strike":600,"net_gex":100000,"put_gex":-100000,"call_gex":200000,"expiration":"20261016"}],"timezone":"America/New_York","spot_price":600,"open_interest_date":"2026-10-13"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_jHgH9t5B56VltkyhLrCXx","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns end-of-day gamma exposure (GEX) by strike and expiration for a given ticker and trading date, using closing open interest data.","exampleAgentPrompt":"Pull the end-of-day gamma exposure breakdown for SPY for October 14, 2026 — I want to see the call GEX, put GEX, and net GEX by strike and expiration so I can find the gamma wall.","exampleUseCases":[{"title":"Identify SPY gamma wall before open","prompt":"What are the biggest GEX levels for SPY from yesterday's close? I want to see where net gamma exposure is concentrated by strike so I can find the gamma wall before the market opens today."},{"title":"Analyze QQQ dealer hedging pressure","prompt":"Pull the end-of-day GEX data for QQQ for last Friday — I want to compare call gamma versus put gamma at each strike to understand where dealer hedging flows might be pinning the price."},{"title":"Historical GEX snapshot for backtesting","prompt":"Get me the end-of-day gamma exposure snapshot for TSLA on 2025-03-21 — I need the net GEX per strike and expiration to backtest how GEX levels correlated with price movement around that date."}],"resultDescription":"A JSON object containing the ticker, spot price at close, snapshot timestamp, the open interest date (prior session), and an array of strikes each with call GEX, put GEX, and net GEX values expressed in USD per 1% underlying move, broken out by expiration date. All times are in America/New_York timezone.","failureModes":["HTTP 404 if the requested date has no available historical GEX data for the ticker","Missing or invalid ticker returns an error","Date format not matching YYYY-MM-DD pattern will fail schema validation","Requesting a future date may return no data or an error","Rate limiting or payment failure may block the response"],"whenToPreferThis":"Use this endpoint when you need end-of-day gamma exposure (GEX) data broken down by strike and expiration for a specific ticker and date. It is ideal for identifying gamma walls, dealer hedging zones, and net gamma concentration for quantitative options analysis or pre-market preparation. Prefer this over real-time flow endpoints when you want the settled, closing-position snapshot rather than intraday activity.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T06:39:45.311Z","isFirstParty":false,"canonicalSlug":"bullflow-end-of-day-gex-gamma-exposure-data-d316954a"}