OptionWhales MCP server

• Registry nameio.optionwhales/options-flowverified in the MCP registry

The registry name sits under optionwhales.io. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

• Stateanswerschecked 2026-10-21
• Tools35
• Server calls itselfoptionwhales-pro-api
• Server version1.4.0
• Protocol version2025-06-18

On 2026-10-21 the server answered initialize and tools/list without a sign-in. First answer in 213 ms.

• Whether its tools do the product's job has not been judged yet.
• Checked on 6 of the 7 days it takes to judge reliability.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

• INITE MCP scoreafter a weeka score needs 7 daily checks: 6 so far
• Answeredmeasuring6 of the 7 daily checks it takes to print a share
• Median first answer236 ms
• Space in an agent's context≈ 4,994 tokensthe definitions of all its tools (35), which an agent carries on every turn
• Tool definitionsA · 96 of 100
• Typed results0 of 35 toolsdeclared outputSchema: results come typed, read once

• Parameters without a description: in 8 of 35

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (30%), doing the product's job (25%), definitions (20%), context (10%) and use (15%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

• intent_flow_current

  Today's options-flow intent rankings: which tickers show bullish vs bearish institutional positioning (accumulation, distribution, hedging), with direction bias and strength. Use for 'what are big options traders doing today?' or 'where…

• momentum_rankings

  Tickers ranked by options-flow momentum (the fastest-changing positioning this session). Use for 'which stocks have the strongest options momentum right now?'. Free keys: top 3; Pro: up to 200 with all fields.

• abnormal_trades_current

  Unusual options activity this session — large, sweep-like or volume-versus-open-interest outlier orders with ticker, direction, size and time. Use for 'any unusual options activity in NVDA?' or 'biggest options trades today'. Without an…

• directional_current

  Per-ticker directional score for this session (-1 bearish to +1 bullish) combining net premium, order clustering and implied volatility. Use to rank names by bullish or bearish options positioning. Pro.

• market_tide

  Market-wide options net-premium 'tide': signed large-order premium into calls versus puts, its intraday cumulative curve, and the top net-premium tickers for a session. Use for 'is options flow bullish or bearish overall today?'. Pro.

• sector_tide

  Options net premium aggregated by sector for a session. Use for 'which sectors are seeing bullish options flow?'. Pro.

• darkpool_ranking

  Off-exchange (dark pool) activity: the market-wide off-exchange share and a per-ticker ranking by off-exchange notional for a date (default latest). Use for 'where is dark pool activity concentrated?'. Pro.

• darkpool_time_profile

  WHEN one ticker's off-exchange (dark pool) volume traded, by price, for a date (default latest): a 5-minute × price grid of shares, the point of control and value area, and the largest block prints at their report time (outside_nbbo flags…

• earnings_current

  Options positioning around earnings for companies reporting this session: pre-earnings order flow, Greeks and intent signals. Use for 'how are traders positioned into NVDA earnings?'. Pro.

• economic_calendar

  Upcoming US economic events (CPI, FOMC, jobs, GDP and more) with impact level and the ETFs that historically react. Use for 'what macro events are coming up?'. Without an account: the next 3 high-impact events; free and Pro: the full…

• earnings_calendar

  Upcoming earnings reports: date, before/after market, EPS and revenue estimates. Pass a ticker for 'when does NVDA report?', or omit it for 'who reports this week?' (days sets the window, default 7). Without an account: date and time for…

• gex_levels

  Dealer gamma-exposure key levels for a ticker: gamma flip, max pain, call wall, put wall and spot. Call wall = the strike at/above spot with the largest call gamma, put wall = the strike at/below spot with the largest put gamma; max pain…

• greek_exposure

  Dealer gamma, charm and vanna exposure for a ticker, by strike and by expiry (calls, puts, net). Use for detailed hedging-flow analysis beyond the key GEX levels. session defaults to the latest trading day. Pro.

• volatility_term_structure

  At-the-money implied volatility by expiration (the IV term structure), plus spot and the overall ATM IV for a ticker. Use for 'is NVDA implied volatility elevated?' or 'is the vol curve inverted before earnings?'. Free keys: SPY, QQQ…

• volatility_movers

  Tickers whose 30-day at-the-money implied volatility moved most versus the prior close (expansions and/or compressions). Use for 'which stocks saw the biggest IV spikes today?'. Free keys: top 3; Pro: up to 50.

• oi_movers

  Tickers ranked by day-over-day change in total options open interest (top gainers, losers, most active). Use for 'where is new options positioning building?'. Pro.

• oi_timeseries

  Open interest and volume across recent snapshots for one ticker (calls, puts, total). Use to see whether options positioning is building or unwinding. Pro.

• contract_chain

  Option chain for a ticker from the latest open-interest snapshot: each contract's OCC symbol, strike, expiry, type and open interest (OI > 0). Filter by expiry, call/put or minimum OI. Pro.

• contract_atm

  Near-the-money option strikes grouped by expiry, within a band around spot (default plus or minus 5%). Use to find the liquid at-the-money contracts for a ticker. Pro.

• contract_historic

  Daily OHLC price bars for one option contract by OCC symbol (e.g. SPY260130C00600000) between two dates, about a year of look-back. Pro.

• stock_quote

  Latest price for a stock or ETF. Real-time for symbols on your key's real-time watchlist; otherwise the most recent price at least 15 minutes old. Use for 'what is NVDA trading at?'. Pro.

• stock_candles

  Intraday OHLCV bars for a stock on a session (default today), 1 to 60 minute bars; returns the most recent `limit` bars. Live bars are real-time for watchlisted symbols and 15 minutes delayed otherwise. Pro.

• technical_indicator

  Technical indicator series for a stock: SMA, EMA, RSI or MACD on adjusted closes (daily by default), latest first. Use for 'is AAPL overbought?' (RSI) or trend questions. Pro.

• financials

  Company financial statements (income statement, balance sheet, cash flow) for trailing-twelve-month, quarterly or annual periods, latest first. Pro.

• dividends

  Cash dividend history for a stock: amount, frequency, ex-dividend and pay dates. Pro.

• stock_splits

  Stock split history for a ticker: execution date and split ratio. Pro.

• stock_news

  Recent news for a ticker, each article with a pre-computed sentiment (positive, negative, neutral) and its reasoning. Use for 'why is TSLA moving?'. Pro.

• short_interest

  FINRA short interest history (bi-weekly settlements) with days to cover for a stock. Use for 'how heavily shorted is GME?'. Pro.

• short_volume

  Daily FINRA short-sale volume and short-volume ratio for a stock, with per-venue split. Pro.

• insider_trades

  SEC Form 4 insider transactions for a stock, latest first: insider, transaction code, shares, price, value and the SEC filing link. Use for 'are insiders buying AAPL?'. Pro.

• seasonality

  Monthly seasonality for a stock: average and median return by calendar month, hit rate, best and worst years over a 1 to 25 year look-back. Pro.

• screener

  Screen the market across options-flow net premium, open-interest change, FDA catalysts and congressional trading. Filter by direction, minimum premium or OI change, catalyst window, trial phase or congress activity; sort and limit. Use…

• register_free_key

  Get a FREE OptionWhales API key for the person you are helping. Only use this if they do not already have a key. Pass their own email address (ask if unsure). The key in the response works immediately for 24 hours, and this MCP session…

• confirm_registration

  Confirm a key from register_free_key using the code in the 'Confirm your OptionWhales API key' email, which makes the key permanent. Safe to call again.

• use_api_key

  Attach an existing OptionWhales API key to this MCP session, for clients that cannot send an X-API-Key header. Use when the person gives you their key.