Pricing

Pay per usage

Prediction Market Arbitrage Feed

Live cross-venue prediction-market arbitrage: the same event priced on Polymarket, Kalshi/Robinhood and PredictIt side by side, with a real arbitrage flagged the moment combined cost drops under $1.

Pricing

Pay per usage

Rating

0.0

(0)

Developer

StartupHub

Actor stats

Bookmarked

Total users

Monthly active users

6 days ago

Last modified

Input

Field	Type	Default	Description
`arbsOnly`	boolean	`false`	When on, return only events with a live arbitrage right now (combined cost under $1). Off returns the full matched-events board.

No API key required.

Output

One dataset item per matched event:

{
  "event": "Will X happen by 2026?",
  "resolves": "2026-12-31",
  "is_arbitrage": true,
  "combined_cost": 0.96,
  "profit_per_dollar": 0.04,
  "roi_pct": 4.2,
  "arb_opened_at": "2026-06-14T15:00:00Z",
  "legs": {
    "yes": { "venue": "polymarket", "venue_label": "Polymarket", "price": 0.55, "url": "https://..." },
    "no":  { "venue": "kalshi", "venue_label": "Kalshi / Robinhood", "price": 0.41, "url": "https://..." }
  },
  "powered_by": "StartupHub.ai"
}

The board refreshes every 30 minutes. A SUMMARY record holds the matched-event and live-arbitrage counts.

Notes

Informational only, not financial advice. Verify each market's exact resolution criteria, fees, and withdrawal terms before trading. Live arbitrages are often fleeting.

Want to poll it directly, or call it from an agent? The same data is a JSON API at https://www.startuphub.ai/api/v1/arbitrage and an MCP tool (get_arbitrage) on the StartupHub.ai MCP server.

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