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GET
/
arbitrage
/
current
/
difference
Price spreads
curl --request GET \
  --url https://api.oddpool.com/arbitrage/current/difference
Find where venues disagree on the same outcome’s price. A large spread signals potential mispricing.
Example: “Will the Fed cut rates?” — YES is 42c on Kalshi but 39c on Polymarket. If you think the true price is closer to 42c, Polymarket is offering a discount.
Unlike arbitrage, price spreads are not risk-free. They highlight venue disagreement, which can signal a trading edge.

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Parameters

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minutes
integer
default:"10000"
Lookback window in minutes.

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Example

curl -H "X-API-Key: your_api_key" \
  "https://api.oddpool.com/arbitrage/current/difference?minutes=10"

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Response

Each row also includes full kalshi, polymarket, and opinion venue blocks (with prices, volume, and execution-ready identifiers like market_ticker, condition_id, and yes_token_id / no_token_id) — see the Cross-venue arbitrage reference for the full venue-block shape. 
[
  {
    "event_id": 42,
    "event_title": "Fed rate decision March",
    "kalshi_event_ticker": "KXFEDDECISION-26MAR",
    "polymarket_event_slug": "fed-rate-march",
    "opinion_market_id": null,
    "market_type": "binary",
    "outcome_key": "yes",
    "label": "25bps cut",
    "timestamp": "2026-03-11T14:30:00",
    "resolution_time": "2026-03-19T18:00:00",
    "kalshi": { "market_ticker": "KXFEDDECISION-26MAR-C25", "yes_ask": 0.42, "no_ask": 0.60, "...": "..." },
    "polymarket": { "condition_id": "0xde04...", "yes_token_id": "307678...", "no_token_id": "403029...", "yes_ask": 0.39, "no_ask": 0.63, "...": "..." },
    "opinion": { "child_market_id": null, "yes_token_id": null, "no_token_id": null, "...": "..." },
    "side": "YES",
    "side1": "Kalshi",
    "side2": "Polymarket",
    "side1_price": 0.42,
    "side2_price": 0.39,
    "diff": 0.03
  }
]