Public API

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Endpoint

GET https://api.flowmonkey.net/api/public/gamma-watch

• Returns JSON. No authentication, no parameters.
• Cached for 60 seconds on our side; please poll no faster than every 30 seconds.
• Data is 15 minutes behind, plus the levels sealed each morning at 9:12 ET.
• Levels are where hedging is concentrated, not targets. Nothing here is advice.

Fields

session

pre, open, after or closed (US equity session, Eastern time).

delay_minutes

How far behind the book is. Always 15.

regime

One sentence on dealer gamma across the three ETFs.

sealed

The morning file sealed at 9:12 ET: day, SHA-256 hash and time. The file itself is on /ledger.

last / prev_close / chg_pct

Price 15 minutes back, the prior session's close, and the change.

net_gex / gamma

Net dealer gamma in dollars and its sign (short or long).

call_wall / put_wall

Largest positive and largest negative gamma strikes.

apex

The largest gamma strike on the board, either sign.

flip / flip_note

Where cumulative gamma changes sign. Null with all_short or all_long when it never does.

priced_move_to_friday

The move the at-the-money options price through Friday, with its low and high.

ladder

Up to 10 of the largest gamma strikes within 4% of price.

sealed (per symbol)

That symbol's levels as sealed at 9:12 ET.

Example response

{
  "ok": true,
  "generated_at": "2026-10-19T18:23:13-04:00",
  "session": "after",
  "delay_minutes": 15,
  "regime": "Dealers short gamma on all three. ...",
  "sealed": { "day": "2026-10-19", "sha256": "1f2ff382...", "sealed_at": "2026-10-19T09:12:01-04:00" },
  "symbols": [
    {
      "symbol": "SPY",
      "last": 766.64,
      "prev_close": 763.25,
      "chg_pct": 0.44,
      "net_gex": -2450298982,
      "gamma": "short",
      "call_wall": 780.0,
      "put_wall": 769.0,
      "apex": 769.0,
      "flip": null,
      "flip_note": "all_short",
      "priced_move_to_friday": 14.15,
      "priced_low": 749.1,
      "priced_high": 777.4,
      "ladder": [{ "strike": 780.0, "gex": 313113537 }],
      "book_as_of": "2026-10-19T20:29:36Z",
      "sealed": { "spot": 767.42, "apex": 771.0, "cap": 770.0, "floor": 769.0, "flip": null }
    }
  ],
  "source": "FlowMonkey options-positioning data. Levels, not targets. Not advice."
}