# Delx Commerce Overround Calculator

> 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

## Facts

- Endpoint: POST https://commerce.delx.ai/api/v1/x402/overround?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-commerce-overround-calculator-86cd2f71
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_O9zgkIy35hDQtRaUx_6cc

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability delx-commerce-overround-calculator-86cd2f71 -d '<json body>'
```

Example prompt: Calculate the overround for these three implied probabilities: 0.45, 0.35, and 0.30 — I want to know the total bookmaker margin baked into these odds.

## When to prefer this

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.

## Known failure modes

- 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

## 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.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "probs": {
   "type": "array",
   "description": "Input field: probs."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "n": 2,
  "schema": "delx/util-overround/v1",
  "overround": 0.1000000000000001,
  "sum_probs": 1.1
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-commerce-overround-calculator-86cd2f71/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from commerce.delx.ai](https://www.zero.xyz/host/commerce.delx.ai/llms.txt)