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Coming soon. These API docs are published for reference, but public API access isn’t open yet — it will be available in the near future.
The Skylit Public API exposes the same real-time options-Greeks (gamma / vanna) heatmaps that power Heatseeker — per strike, with the live velocity metric and Skylit’s node classification (King, Gatekeeper, Pika, Barney, and more).

Live heatmap

Current per-strike heatmap for one or more symbols, including live velocityPct.

Historical replay

The snapshot nearest any past instant — up to 365 days back.

Live stream (SSE)

A Server-Sent Events feed of live heatmap updates, one symbol per connection.

Authentication

Bearer API keys, credit metering, and rate limits.

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Base URL

https://api.skylit.ai

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Quickstart

1

Get an API key

Generate a key from your account console. New accounts are seeded with 5,000 credits.
2

Fetch a live heatmap

Pull the current per-strike gamma heatmap for SPY:
curl "https://api.skylit.ai/v1/heatmap?symbols=SPY&metric=gamma" \
  -H "Authorization: Bearer sk_live_your_key"
3

Go cross-asset

Comma-separate symbols for a single Trinity call — symbols=SPY,SPX,QQQ — and each comes back as an element of data.symbols.

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How responses look

Every success returns a data / meta envelope; errors return an error object. Fields are camelCase. 
{
  "data": {
    "symbols": [
      {
        "symbol": "SPY",
        "asOf": "2026-05-22T14:31:00Z",
        "spot": 591.23,
        "strikes": [
          { "strike": 590, "value": 1894300.4, "nodeType": "king", "velocityPct": 12.4 },
          { "strike": 595, "value": 642100.2, "nodeType": "gatekeeper", "velocityPct": -3.1 }
        ]
      }
    ]
  },
  "meta": { "metric": "gamma", "resolution": "1m", "mode": "live", "cached": false }
}
​
Node types
king · gatekeeper · pika · barney · significant · normal
Each strike carries Skylit’s node classification — the same vocabulary used throughout Patternpedia.
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velocityPct
live only
Present on /v1/heatmap; omitted on /v1/historical (velocity is a live metric).
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Credits
metered per request
/v1/heatmap costs 1, /v1/historical costs 5, /v1/stream 1 per minute open. Every response carries X-Credits-Remaining. See Authentication.