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Delx Commerce Overround Calculator
x402
Delx Commerce Overround 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).
Calculates the overround (bookmaker margin) from an array of probability values
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 number of input probabilities (n), the schema identifier, the computed overround as a decimal (e.g. 0.10 = 10%), and the raw sum of all input probabilities.
Example use cases
Sports betting margin check
“I have three implied probabilities from a bookmaker for a soccer match: home win 0.55, draw 0.28, away win 0.25. Can you calculate the overround to tell me how much margin the bookie is taking?”
Prediction market fairness audit
“These are the implied probabilities from a prediction market: 0.60 and 0.45. Calculate the overround so I can see whether there's an edge embedded in these prices.”
Horse race odds verification
“I've converted the fractional odds on a 4-horse race to implied probabilities: 0.40, 0.30, 0.20, 0.15. What's the overround? I want to know how much the track is keeping.”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/overround?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, cheap, pay-per-call computation of bookmaker margin without any signup or subscription. Ideal for agents that occasionally need to audit odds or probabilities in betting, prediction markets, or any probabilistic pricing context. At $0.001 USDC it is effectively free for one-off checks, with verifiable delivery on Base or Solana.
Side effects
- Empty or missing probs array returns a validation error
- Non-numeric values in probs array cause a parse failure
- All probabilities summing to exactly 1.0 returns overround of 0.0 (fair market, may be unexpected)
- Payment failure via x402 protocol prevents API access
- Network timeout on slow connections
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| probs | array | Input field: probs. |
Output
Schema · Response
{
"type": "json",
"example": {
"n": 2,
"schema": "delx/util-overround/v1",
"overround": 0.1000000000000001,
"sum_probs": 1.1
}
}Tags
x402
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