# Delx Fractional Odds to Probability Converter

> Delx Fractional Odds to Probability Converter 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).

Converts fractional odds (numerator/denominator) into implied probability and decimal odds

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/odds-fractional-to-prob
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-fractional-odds-to-probability-converter-b802b778
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qKHQlmSfrpv3lJSbpBMxa

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-fractional-odds-to-probability-converter-b802b778 -d '<json body>'
```

Example prompt: What's the implied probability and decimal odds for fractional odds of 5 to 2?

## When to prefer this

Use this endpoint when you need a fast, deterministic conversion from fractional odds (common in UK/Irish horse racing and traditional bookmaking) to implied probability and decimal odds. Prefer it over manual calculation in agent pipelines to avoid floating-point errors and to maintain a consistent schema-versioned output.

## Known failure modes

- Missing num or den fields returns a validation error
- Denominator of zero may cause division-by-zero error or bad response
- Non-integer inputs may fail schema validation
- Negative values may produce nonsensical probability outputs

## How this service works

Convert fractional odds (num/den) into implied probability. Call when UK-style fractional books into probability space. Returns implied probability from fractional odds 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 original numerator and denominator, the implied probability as a float (e.g. 0.2857), and the equivalent decimal odds (e.g. 3.5).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "den": {
   "type": "integer",
   "description": "Input field: den."
  },
  "num": {
   "type": "integer",
   "description": "Input field: num."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "den": 2,
  "num": 5,
  "prob": 0.2857142857142857,
  "schema": "delx/util-odds-fractional-to-prob/v1",
  "decimal_odds": 3.5
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-fractional-odds-to-probability-converter-b802b778/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)