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Delx Binary Fair Price
x402
Delx Binary Fair Price is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Computes the fair (breakeven) price for a binary outcome given its probability, suitable for pricing binary options or bets.
Price / call$0.001
Success—
StatusUnknown
How this service works
Map a true probability into a binary contract fair price in [0,1]. Call when pricing yes/no markets from your probability model. Returns fair price in [0,1] as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.
Output
Returns a JSON object containing the echoed input probability, the computed fair price (numerically equal to the probability for a binary contract, i.e. expected value), and a schema identifier string ('delx/util-binary-fair-price/v1') confirming the calculation schema used.
Example use cases
Pricing a prediction market contract
“I'm running a prediction market where the community gives a 62% chance of this event occurring — what's the fair price I should set for the binary contract?”
Valuing a binary options trade
“I'm considering a binary options trade where I estimate the underlying has a 45% probability of finishing in the money — what's the fair breakeven price I should pay?”
Calibrating agent reward signals
“My agent is computing payout amounts for a binary success/failure task with an estimated 80% success probability — what's the fair price it should charge per unit?”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/binary-fair-priceWhen to prefer
Use this endpoint when you need to quickly compute the theoretical fair (expected-value) price for a binary outcome from a raw probability — especially useful in prediction markets, binary options pricing, or any agent workflow that must translate a probability estimate into a fair-value monetary amount without implementing the math locally.
Side effects
- Probability value outside [0,1] range may return a validation error or unexpected result
- Missing 'prob' field in request body returns an error
- Non-numeric value for 'prob' causes a schema validation failure
- Network or service unavailability returns a 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| prob | number | Input field: prob. |
Output
Schema · Response
{
"type": "json",
"example": {
"prob": 0.37,
"schema": "delx/util-binary-fair-price/v1",
"fair_price": 0.37
}
}Tags
x402
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