OptionWhales

Measured conclusion: Deep-tested. L2 outcome: tools_ok.

US options flow & stock data: unusual activity, gamma levels, IV, earnings. OAuth sign-in or keys.

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Copy this into your MCP client config:

{
  "mcpServers": {
    "OptionWhales": {
      "url": "https://api.optionwhales.io/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (35)

• intent_flow_current read-only

  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 is smart money flowing?'. Without an account: top 3 tickers (ticker, intent, direction); free: top 3 with core fields; Pro: every tracked ticker with all fields.

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• momentum_rankings read-only

  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.

  Parameters:

  • top — integer — Tickers to return (default 50)

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• abnormal_trades_current read-only

  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 account: the latest 3 trades (ticker, direction, type, time); free: the latest 5 with core fields; Pro: the full feed.

  Parameters:

  • limit — integer — Trades to return (default 100)

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• directional_current read-only

  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.

  Parameters:

  • max_display — integer — Tickers to return (default 100)

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• market_tide read-only

  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.

  Parameters:

  • top_n — integer — Top tickers to include (default 25)
  • session — string — Trading date YYYY-MM-DD, or 'latest' (default)

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• sector_tide read-only

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

  Parameters:

  • session — string — Trading date YYYY-MM-DD, or 'latest' (default)

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• darkpool_ranking read-only

  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.

  Parameters:

  • date — string — YYYY-MM-DD (default latest)

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• darkpool_time_profile read-only

  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 prints reported beyond the quote, away_from_quote those priced away from it: >0.1% and 2 cents outside). cells_side gives each cell's [buy, sell, away] shares (buy = at the ask + 60% near it, sell = at the bid + 60% near it, away left out, rest neutral); totals add buy_volume, sell_volume, away_volume. Side is an NBBO-location proxy, not buy/sell; ~15 min delayed. Use for 'when did the dark pool trade NVDA around 180?'. Pro.

  Parameters:

  • ticker (required) — string — Ticker, e.g. NVDA
  • date — string — YYYY-MM-DD (default latest)

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• earnings_current read-only

  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.

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• economic_calendar read-only

  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 calendar.

  Parameters:

  • impact — string — Optional filter: high, medium or low

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• earnings_calendar read-only

  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 one ticker or the next 3 reporters; free: up to 10 with estimates; Pro: the full calendar plus the options-flow intent label.

  Parameters:

  • days — integer — Days ahead to return (default 7)
  • limit — integer — Reporters to return (default 10)
  • ticker — string — Optional ticker, e.g. NVDA

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• gex_levels read-only

  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 is struck per expiration and max_pain_expiry names the (front) expiry it belongs to — max_pain_basis / wall_basis say which definition each field carries. Use when asked where price may pin, bounce, stall or accelerate, e.g. 'what are the gamma levels on SPY?'. session defaults to the latest trading day. Without an account and on free: SPY and QQQ; Pro: any ticker.

  Parameters:

  • ticker (required) — string — Stock or ETF ticker, e.g. NVDA, SPY, BRK.B
  • session — string — Trading date YYYY-MM-DD, or 'latest' (default)
  • dte_filter — integer — Optional expiry window filter

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• greek_exposure read-only

  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.

  Parameters:

  • ticker (required) — string — Stock or ETF ticker, e.g. NVDA, SPY, BRK.B
  • session — string — Trading date YYYY-MM-DD, or 'latest' (default)
  • dte_filter — string

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• volatility_term_structure read-only

  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, AAPL, MSFT, GOOGL, AMZN, NVDA, META, TSLA; Pro: any ticker.

  Parameters:

  • ticker (required) — string — Stock or ETF ticker, e.g. NVDA, SPY, BRK.B

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• volatility_movers read-only

  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.

  Parameters:

  • limit — integer — Tickers to return (default 10)
  • direction — string

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• oi_movers read-only

  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.

  Parameters:

  • dte — string
  • limit — integer — Tickers to return (default 50)

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• oi_timeseries read-only

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

  Parameters:

  • ticker (required) — string — Stock or ETF ticker, e.g. NVDA, SPY, BRK.B
  • dte — string
  • slot — string

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• contract_chain read-only

  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.

  Parameters:

  • ticker (required) — string — Stock or ETF ticker, e.g. NVDA, SPY, BRK.B
  • date — string — Snapshot date YYYY-MM-DD (default latest)
  • type — string
  • limit — integer — Contracts to return (default 500)
  • expiry — string — One expiry, YYYY-MM-DD
  • min_oi — integer

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• contract_atm read-only

  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.

  Parameters:

  • ticker (required) — string — Stock or ETF ticker, e.g. NVDA, SPY, BRK.B
  • date — string — Snapshot date YYYY-MM-DD (default latest)
  • width — number — Strike band as a fraction of spot (default 0.05)

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• contract_historic read-only

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

  Parameters:

  • occ (required) — string — OCC option symbol, e.g. SPY260130C00600000
  • from (required) — string — YYYY-MM-DD
  • to (required) — string — YYYY-MM-DD

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• stock_quote read-only

  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.

  Parameters:

  • ticker (required) — string — Stock or ETF ticker, e.g. NVDA, SPY, BRK.B

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• stock_candles read-only

  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.

  Parameters:

  • ticker (required) — string — Stock or ETF ticker, e.g. NVDA, SPY, BRK.B
  • limit — integer — Most recent bars to return (default 120)
  • session — string — YYYY-MM-DD (default today)
  • timespan — integer — Minutes per bar (default 1)

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• technical_indicator read-only

  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.

  Parameters:

  • ticker (required) — string — Stock or ETF ticker, e.g. NVDA, SPY, BRK.B
  • indicator (required) — string
  • limit — integer — Points to return (default 50)
  • window — integer — Look-back window for sma/ema/rsi (default 14)
  • timespan — string
  • long_window — integer
  • short_window — integer
  • signal_window — integer

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• financials read-only

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

  Parameters:

  • ticker (required) — string — Stock or ETF ticker, e.g. NVDA, SPY, BRK.B
  • limit — integer — Periods to return (default 4)
  • timeframe — string

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• dividends read-only

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

  Parameters:

  • ticker (required) — string — Stock or ETF ticker, e.g. NVDA, SPY, BRK.B
  • limit — integer — Dividends to return (default 20)

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• stock_splits read-only

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

  Parameters:

  • ticker (required) — string — Stock or ETF ticker, e.g. NVDA, SPY, BRK.B
  • limit — integer — Splits to return (default 20)

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• stock_news read-only

  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.

  Parameters:

  • ticker (required) — string — Stock or ETF ticker, e.g. NVDA, SPY, BRK.B
  • limit — integer — Articles to return (default 10)

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• short_interest read-only

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

  Parameters:

  • ticker (required) — string — Stock or ETF ticker, e.g. NVDA, SPY, BRK.B
  • limit — integer — Settlements to return (default 24)

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• short_volume read-only

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

  Parameters:

  • ticker (required) — string — Stock or ETF ticker, e.g. NVDA, SPY, BRK.B
  • limit — integer — Days to return (default 30)

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• insider_trades read-only

  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.

  Parameters:

  • ticker (required) — string — Stock or ETF ticker, e.g. NVDA, SPY, BRK.B
  • limit — integer — Transactions to return (default 25)

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• seasonality read-only

  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.

  Parameters:

  • ticker (required) — string — Stock or ETF ticker, e.g. NVDA, SPY, BRK.B
  • years — integer — Look-back in years (default 10)

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• screener read-only

  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 for 'find bullish options-flow names with an FDA catalyst in the next 30 days'. Pro.

  Parameters:

  • limit — integer — Rows to return (default 25)
  • order — string
  • phase — string
  • session — string — Trading date YYYY-MM-DD, or 'latest' (default)
  • signals — array — Signals a row must carry
  • sort_by — string
  • direction — string
  • has_congress — boolean — Require congressional trades in the last 30 days
  • min_oi_change — integer — Minimum day-over-day OI change
  • fda_within_days — integer — Require an FDA catalyst within N days (0 = no requirement)
  • min_abs_premium — number — Minimum absolute net premium in dollars

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• 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 starts using it automatically when the client supports sessions. OptionWhales emails them 'Confirm your OptionWhales API key' with a confirmation code: if you can read their inbox, call confirm_registration with that code; otherwise ask them to click the link. Once confirmed the key is permanent (and Pro if their account is Pro).

  Parameters:

  • email (required) — string — Email address of the person you act for
  • agent_name — string — Your assistant's name, shown to them in the email

  Hints: read-only no · destructive no · idempotent no · open-world yes

• 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.

  Parameters:

  • code (required) — string — Confirmation code from the email

  Hints: read-only no · destructive no · idempotent yes · open-world no

• 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.

  Parameters:

  • api_key (required) — string — An ow_free_... or ow_pro_... key

  Hints: read-only no · destructive no · idempotent yes · open-world no

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