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Bullflow Peak Return Calculator
x402
Bullflow Peak Return Calculator is a paid API for AI agents from api.bullflow.io, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).
Returns the peak (highest) price and maximum percent return achieved by an options contract since a specified entry trade timestamp and price.
Price / call$0.01
Success—
StatusUnknown
How this service works
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.
Output
Returns a JSON object with two fields: 'peakPriceSinceTimestamp' (the highest option price in USD formatted to two decimal places as a string) and 'peakPercentReturnSinceTimestamp' (the maximum percentage return relative to the provided entry price as a number). Example: {"peakPriceSinceTimestamp": "1.50", "peakPercentReturnSinceTimestamp": 11.11}.
Example use cases
Validate unusual options flow trade performance
“I saw an unusual call sweep on SPY last week — the contract was O:SPY261016C00650000 and it was entered at $0.75 per share at timestamp 1711900000. What was the peak price and highest return on that contract since that trade?”
Post-trade options performance review
“Can you check how well my SPY options trade did? I entered O:SPY261016C00650000 at $1.20 per share on Unix timestamp 1712500000 — I want to know the peak price and best percentage return it hit since then.”
Dark pool trade peak return analysis
“There was a dark pool options trade flagged on Bullflow for O:SPY261016C00650000 at an entry price of $0.30 per share and timestamp 1713000000. What's the peak return percentage since that trade was made?”
Technical details
Endpoint
GEThttps://api.bullflow.io/v1/data/peakReturn?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to retrospectively evaluate the best-case return on a specific options contract since a known entry point, especially for analyzing unusual options flow or dark pool trades tracked by Bullflow. It is ideal for performance attribution, trade journaling, or validating smart-money signals. Prefer this over general market data APIs when the context is unusual options activity and you have a precise entry price and timestamp to anchor the peak return calculation.
Side effects
- Invalid or malformed option contract symbol returns an error
- Entry price of zero or negative value rejected (exclusiveMinimum: 0)
- Trade timestamp of zero or negative value rejected (exclusiveMinimum: 0)
- Future timestamps or timestamps with no available data may return empty or null results
- Contract symbol not found in Bullflow data may return a 404 or empty response
- Network or API rate-limit errors may occur under high request volume
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"peakPriceSinceTimestamp": "1.50",
"peakPercentReturnSinceTimestamp": 11.11
}
}Tags
x402
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