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Saylor Innovations Kelly Criterion Calculator
x402
Saylor Innovations Kelly Criterion Calculator is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).
Calculates Kelly criterion bet sizing (full, half, quarter Kelly) from win probability and odds, plus expected log growth, edge, break-even win rate, and a plain-language verdict
Price / call$0.01
Success—
StatusUnknown
How this service works
Kelly criterion bet sizing from win probability and odds - full, half and quarter Kelly, expected log growth, break-even win rate and a verdict
Output
A JSON object containing the win probability and net odds echoed back, full/half/quarter Kelly percentages, the full Kelly fraction, edge per unit staked, break-even win probability, expected log growth for full and half Kelly, a note providing context, and a plain-language verdict summarising whether the bet is worth taking and at what sizing.
Example use cases
Sports bet sizing decision
“I'm looking at a football bet where I estimate a 60% chance of winning and the bookmaker is offering 1.5 to 1 net odds — what does Kelly criterion say I should stake, and what are the half and quarter Kelly sizes?”
Poker hand EV and sizing
“In this poker spot I figure I'm winning 72% of the time and the pot odds work out to 0.9 to 1 net — calculate the full Kelly fraction, the expected log growth, and tell me if it's worth playing.”
Trading strategy position sizing
“My backtested trading strategy wins 48% of the time with an average net payout of 2.2 per unit risked — use Kelly to figure out what fraction of capital to deploy and give me the break-even win rate so I know my margin of safety.”
Technical details
Endpoint
GEThttps://saylorinnovations.com/api/finance/kelly?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a complete Kelly criterion analysis in one call — including fractional Kelly variants, expected log growth, edge calculation, break-even win rate, and a verdict — rather than implementing the formula yourself or using a generic math tool. It is ideal for betting, trading position sizing, and any bankroll management scenario where you have a probability estimate and net odds.
Side effects
- Missing required query parameters win_prob or odds returns an error
- win_prob outside 0-1 range may produce invalid or negative Kelly fractions
- Odds of 0 or negative values may cause division errors
- win_prob of exactly 0 or 1 may produce null expected log growth fields
- Network or payment failure returns a 402 or 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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