Sports Odds Delta Feed — line movement, not line dumps

Every odds actor on this store hands you the whole board every run. You pay for the same 1,200 rows a hundred times a day and diff them yourself.

This one returns only the lines that moved. Poll it every minute, pay for the movement, and get previous → current already computed.

What you get per row

{
  "event_key": "basketball:nba:401909907",
  "event": "OKC @ CLE",
  "market": "moneyline",
  "selection": "home",
  "point": null,
  "book": "draftkings",
  "decimal_price": 1.578,
  "american_price": -173,
  "implied_prob": 0.633714,
  "previous_decimal_price": 1.62,
  "price_change": -0.042,
  "price_change_pct": -2.59,
  "kickoff_utc": "2026-11-03T00:00Z",
  "captured_at": "2026-11-03T13:40:50+00:00"
}

Markets: moneyline, spread, total. Both decimal and American prices, plus implied probability, so you do not re-derive them.

Two modes

Mode	Use it for	Cost
latest	First call, or a full resync	Every row returned
deltas	Polling — the normal case	Only rows that moved

deltas needs a sinceRun. Run once in latest, read the run_id from the run summary, then poll deltas with that id.

Input

{
  "mode": "deltas",
  "sport": "basketball",
  "league": "nba",
  "maxEvents": 12,
  "sinceRun": 1
}

• sport / league are ESPN paths: basketball/nba, americanfootball/nfl, baseball/mlb, icehockey/nhl, soccer/esp.1 for LaLiga.
• maxEvents caps upstream work (default 12).
• limit caps returned rows — it caps your bill, so set it while testing.
• market filters latest to moneyline, spread or total.

Pricing

Charged per returned row (odds_row event). A 12-event NBA board is roughly 200–300 rows; a delta poll on a quiet board is usually zero to a few dozen, and a run that returns nothing is free.

Who this is for

• Line-movement trackers that need history without storing the world.
• Agents and LLM tools that poll on a schedule and only want the diff.
• Closing-line-value work — capture the last price before kickoff by polling deltas.

Honest limitations

• US books only via the live source (ESPN's public feed, which surfaces DraftKings). European books — Winamax, William Hill ES, Bet365 ES — come through the ingest source, where you supply a normalised JSON file from your own scraper. That path is documented and tested; it is not zero-config.
• Pre-match prices, not live in-play. is_live is on the row and always false from the current public source.
• Upstream is best-effort. A book that fails to answer is skipped, never invented; the run summary tells you what was fetched.

Keywords

sports odds, betting odds, line movement, closing line value, NBA odds, NFL odds, odds API, odds scraper, implied probability, sportsbook, arbitrage detection, delta feed