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Delx Commerce — Binary Expected Value Calculator
x402
Delx Commerce — Binary Expected Value Calculator is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).
Computes the expected value (EV) and number of shares for a binary prediction market position given stake, true probability, and market price
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.
Output
Returns a JSON object containing the computed expected value (ev), the number of shares the stake purchases at the given market price (shares), the original stake echoed back, and a schema identifier (delx/util-binary-ev/v1) for verifiable result attribution.
Example use cases
Evaluating a prediction market bet
“I'm looking at a binary market where I think the real probability is 65% but it's priced at 52%. If I put in a stake of 200, what's my expected value and how many shares do I receive?”
Screening for profitable trading edges
“Run an EV check for me: my estimated true probability is 0.72, the market price is 0.60, and I want to stake 500 — is this a positive EV trade and how many shares would I get?”
Comparing multiple binary market positions
“For a binary market where my true probability estimate is 0.55 and the current market price is 0.50, what would my EV and share count be if I stake 1000?”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/binary-ev?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs a fast, cheap, single-call computation of binary prediction market EV with verifiable on-chain micropayment settlement. Ideal for agents that are screening multiple prediction market positions programmatically and need a deterministic, auditable calculation rather than an LLM estimate. The $0.001 USDC per-call price makes it economical for high-frequency screening workflows.
Side effects
- Missing required fields (stake, true_prob, market_price) result in a 400-level error
- market_price of 0 causes division-by-zero or undefined share calculation
- true_prob outside [0,1] range may produce nonsensical EV values
- Payment failure via x402 (insufficient USDC balance) prevents the call from completing
- Network timeout or service unavailability returns no result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| stake | integer | Input field: stake. |
| true_prob | number | Input field: true prob. |
| market_price | number | Input field: market price. |
Output
Schema · Response
{
"type": "json",
"example": {
"ev": 14.58333333333334,
"stake": 100,
"schema": "delx/util-binary-ev/v1",
"shares": 208.3333333333333
}
}Tags
x402
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