Parlay / accumulator odds API

Combines independent parlay legs into total decimal/American odds and hit probability, computes payout and profit on a stake, and (with true leg probabilities) the parlay EV exposing compounded vig. Answers 'What are the combined odds of my parlay?', 'What is the payout on a 3-leg accumulator?'.

Price$0.04per request

MethodPOST

Route/v1/sports/parlay-odds

StatusLive

MIME typeapplication/json

Rate limit120/minute

Cache0s public

sportsbettingparlayaccumulatormulticombined-oddspayoutprobabilityacca

API URLhttps://x402.hexl.dev/v1/sports/parlay-odds

Integration docs

Example request

{
  "legs": [
    2,
    1.5,
    3
  ],
  "stake": 10
}

Example response

{
  "legs": [
    2,
    1.5,
    3
  ],
  "numLegs": 3,
  "combinedDecimal": 9,
  "combinedAmerican": 800,
  "impliedProbability": 0.11111111,
  "stake": 10,
  "payout": 90,
  "profit": 80,
  "formula": "combined = Πdecimal_i; implied = Π(1/decimal_i)"
}

Input schema

{
  "type": "object",
  "required": [
    "legs"
  ],
  "properties": {
    "legs": {
      "type": "array",
      "items": {
        "type": "number"
      },
      "description": "Decimal odds per leg (>=2 legs)",
      "examples": [
        [
          2,
          1.5,
          3
        ]
      ]
    },
    "stake": {
      "type": "number",
      "examples": [
        10
      ]
    },
    "trueProbabilities": {
      "type": "array",
      "items": {
        "type": "number"
      },
      "examples": [
        [
          0.5,
          0.6,
          0.35
        ]
      ]
    }
  }
}

Output schema

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