# Delx Odds Vig Strip

> Delx Odds Vig Strip is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).

Strips the bookmaker's overround (vig) from a pair of decimal odds to return fair implied probabilities and the overround percentage.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/odds-vig-strip
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-odds-vig-strip-469c15ca
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_plo9QsXInF-wuxjPDU8t5

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-odds-vig-strip-469c15ca -d '<json body>'
```

Example prompt: Strip the vig from these two-sided market odds: side A is 1.95 and side B is 1.95 — what's the overround and the fair probability for each side?

## When to prefer this

Use this endpoint when you need to quickly decompose a two-outcome bookmaker market into its fair probabilities and quantify the margin. It is ideal for agents doing pre-bet value assessment, cross-book margin comparison, or arbitrage screening on binary markets. Prefer this over manual calculation when you need a consistent, auditable result with minimal latency and a trivial cost per call.

## Known failure modes

- Missing odds_a or odds_b fields returns a validation error
- Odds values of 1.0 or below (implying 100%+ probability) are mathematically invalid and may return an error or undefined behavior
- Non-numeric values in odds fields will fail schema validation
- Odds values that together imply a significant underround (sum of implied probs below 1) may return unexpected or negative overround values

## How this service works

Strip proportional vig from two-way decimal odds to fair probs. Call when fair probability recovery from a two-way book. Returns fair_probs and overround 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 with the schema identifier, the overround as a decimal (e.g. 0.039 representing ~3.9% bookmaker margin), and an array of two fair implied probabilities for side A and side B after removing the vig.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "odds_a": {
   "type": "number",
   "description": "Decimal odds for side A"
  },
  "odds_b": {
   "type": "number",
   "description": "Decimal odds for side B"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "schema": "delx/util-odds-vig-strip/v1",
  "overround": 0.03913630229419707,
  "fair_probs": [
   0.5064935064935064,
   0.4935064935064936
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-odds-vig-strip-469c15ca/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)