No-vig 2-way odds API

Removes the bookmaker vig from a two-way market via proportional normalization, returning fair probabilities, fair decimal odds, and the baked-in margin. Answers 'What are the true no-vig odds on this moneyline?', 'How much vig is in this two-way market?'.

Price$0.04per request

MethodPOST

Route/v1/sports/novig-2way

StatusLive

MIME typeapplication/json

Rate limit120/minute

Cache0s public

sportsbettingno-vigvigoverroundfair-oddstwo-waymoneylinemargin

API URLhttps://x402.hexl.dev/v1/sports/novig-2way

Integration docs

Example request

{
  "decimalA": 1.91,
  "decimalB": 1.91
}

Example response

{
  "decimalA": 1.91,
  "decimalB": 1.91,
  "impliedA": 0.52356,
  "impliedB": 0.52356,
  "overround": 1.04712,
  "bookmakerMarginPct": 4.712,
  "fairProbabilityA": 0.5,
  "fairProbabilityB": 0.5,
  "fairDecimalA": 2,
  "fairDecimalB": 2,
  "formula": "fair_i = (1/decimal_i) / Σ(1/decimal_j); margin = Σ(1/decimal_j) - 1"
}

Input schema

{
  "type": "object",
  "required": [
    "decimalA",
    "decimalB"
  ],
  "properties": {
    "decimalA": {
      "type": "number",
      "description": "Decimal odds side A (>1)",
      "examples": [
        1.91
      ]
    },
    "decimalB": {
      "type": "number",
      "description": "Decimal odds side B (>1)",
      "examples": [
        1.91
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}