Odds API for Positive EV Betting

Positive EV betting API with no-vig fairOdds and every AU book's price side by side, so you can surface +EV bets without building your own devig pipeline.

SockOdds ships no-vig fairOdds alongside every bookmaker's posted price on Base and above, so a positive EV tool can compare each Australian book's odds to a true-probability benchmark out of the box. A single event object returns 21 Australian books, the Betfair Exchange, Pinnacle and the prediction markets, plus fairOdds, fairSpread and fairOverUnder, with no devig pipeline to build or maintain.

Why use SockOdds to find +EV bets

  • No-vig fair odds ship with every market. Each oddID carries fairOdds, fairSpread and fairOverUnder, and fairOddsAvailable says whether enough sharp data existed to compute them.
  • Every book's price sits side by side in byBookmaker. 21 Australian books plus Betfair Exchange, Kalshi, Polymarket, ProphetX. You scan for the one book pricing a side cheaper than fair.
  • Player props, team props and alt lines are first-class. +EV is easiest to find in less-efficient markets, and they carry the same fields.
  • Line movement is one retained event away. Finished events stay in the feed; snapshot the prices you flag and measure them against the last price seen before kick-off.
  • Honest flags. A price with available: false or on a stale event is never a real edge; the feed tells you.

How a +EV bet finder works with our data

In a +EV finder the comparison loop is trivial; the fair-value benchmark behind it is the hard part. SockOdds derives it from the exchange and sharp-book consensus and returns it as fairOdds (see how consensus odds are calculated).

Compare each book's price to fairOdds

Convert fairOdds to an implied probability, then each byBookmaker entry (use decimal: probability = 1/decimal). When a book's implied probability is lower than fair, that price pays more than it should — a positive-EV bet.

Cover props and alt lines, not just mains

Head-to-head on big games is efficient; the edge lives in props and alternate lines, which carry the same fields.

Track the closing price

Store the price you flagged, refetch the event after kick-off (finished events are retained), and compare against the last lastUpdatedAt price. Opening and closing snapshots are not stored by the feed yet, so snapshot yourself.

Example request

curl "https://api.sockodds.com/v2/events/?leagueID=EPL&oddsAvailable=true&oddID=points-home-game-ml3way-home&limit=1" \
  -H "x-api-key: YOUR_API_KEY"

Here fairOdds and each book's price are side by side; a book whose implied probability sits below the fair one is +EV:

{
  "data": [
    {
      "eventID": "epl_2026-09-13_arsenal_vs_chelsea",
      "odds": {
        "points-home-game-ml3way-home": {
          "oddID": "points-home-game-ml3way-home",
          "fairOdds": "-148",
          "bookOdds": "-155",
          "byBookmaker": {
            "pinnacle": {
              "odds": "-150",
              "decimal": 1.67,
              "available": true
            },
            "sportsbet": {
              "odds": "-135",
              "decimal": 1.74,
              "available": true
            }
          }
        }
      }
    }
  ]
}

Fair −148 implies a true probability near 59.7%; Sportsbet at 1.74 implies 57.5%. Because the book's implied probability is lower than fair, the Sportsbet price is +EV.

SockOdds vs building your own devig pipeline

CapabilitySockOddsbuilding your own devig pipeline
No-vig fair oddsfairOdds/fairSpread/fairOverUnder per marketChoose and tune a devig method yourself
Bookmaker coverage21 AU books + Pinnacle, Betfair Exchange, prediction marketsOnly the books you maintain scrapers for
Player props & alt linesSame shape as main marketsA separate parsing job per market type
Update speed~2 minutesBounded by your polling and scraper reliability
Closing pricesRetained events; snapshot yourselfSnapshot and store every line yourself
MaintenanceVendor absorbs source changesYou own every scraper break
ControlFixed consensus methodologyFull control over sources and weighting

Frequently asked questions

What is a positive EV betting API?

A feed that gives you both each bookmaker's posted price and a true-probability benchmark, so software can flag bets where a book pays more than the outcome is worth.

How do you calculate no-vig / fair odds?

From the exchange and sharp-book consensus where those price the market, with the margin removed; fairOddsAvailable says when that was possible.

How do I find +EV bets from the data?

Convert fairOdds to a probability, convert each book's decimal to 1/decimal, flag any book whose implied probability is lower than fair.

Which sportsbooks are included?

21 Australian books plus Betfair Exchange, Kalshi, Polymarket, ProphetX.

How fresh is the odds data?

Every ~2 minutes on every plan.

Can I track closing-line value (CLV)?

Snapshot the prices you flag; finished events are retained so you can refetch the last price. Open/close snapshots are not stored by the feed yet.

Related use cases

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