Bet Better Open Model API

A free, open, read-only JSON feed of our sports model's win probabilities and fair odds across nine sports. No API key, no sign-up, no rate limit worth worrying about.

No key required CC BY 4.0 CORS enabled HTTPS 9 sports

Quick start

Append ?format=json to any picks page on the site. That is the whole API.

curl "https://betbetter.world/afl/picks.aspx?format=json"

What the model publishes

Every entry is our model's own estimate for one selection: how likely we think it is to happen, and what odds would make that a fair price.

Example response

{
  "site": "Bet Better",
  "sport": "AFL",
  "type": "picks",
  "updatedUtc": "2026-07-26T04:10:00.0000000Z",
  "licence": "CC BY 4.0 — free to use with attribution to Bet Better (https://betbetter.world)",
  "attribution": "Bet Better — https://betbetter.world",
  "docs": "https://betbetter.world/api/",
  "disclaimer": "Model estimates for research. Not a guarantee. 18+. Please gamble responsibly.",
  "count": 1,
  "picks": [
    {
      "game": "Geelong Cats @ Collingwood Magpies",
      "gameTimeUtc": "2026-07-29T23:30:00.0000000Z",
      "market": "Head to Head",
      "selection": "Geelong Cats",
      "line": null,
      "modelProbabilityPct": 54.9,
      "fairOdds": 1.95,
      "confidence": "LEAN",
      "verdict": "As of Jul 26, 2026, Bet Better's model rates Geelong Cats a 54.9% chance to land, which is fair value at odds of 1.95. Confidence: LEAN."
    }
  ]
}

Endpoints

Three feed shapes exist for each league. best-bets returns game lines only, prop-bets returns player props only, and picks returns both, ranked. Add ?format=json to any of them.

What this API deliberately does not include

Licence and attribution

Published under CC BY 4.0. You may use, transform and redistribute it, including commercially, provided you credit the source. A link back to betbetter.world is the simplest way to do that.

Caching and fair use

• Responses are cacheable for 15 minutes; underlying model output refreshes several times a day.
• No authentication and no hard rate limit. Please cache rather than polling in a tight loop.
• Fixtures already started are excluded, so a feed is empty out of season. That is expected, not an error.
• On a data error the feed returns a valid document with an error field rather than a 500.

Open data

We also publish a free dataset of 206,722 AFL player-match records from 2000 to 2023, with weather, attendance and advanced tracking statistics, under the same CC BY 4.0 licence. It contains no odds data.

Model context

Probabilities come from per-sport models retrained on historical results. They are estimates, not predictions of certainty — a 70% selection is meant to lose roughly three times in ten. Read how the model works or check the published results record before relying on any of it.