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predict.memoryapi.org Mispricing Detector
x402
predict.memoryapi.org Mispricing Detector is a paid API for AI agents from predict.memoryapi.org, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Identifies prediction market contracts where the real-world outcome is already determined but the market price has not yet corrected
Price / call$0.01
Success—
StatusUnknown
How this service works
Detect prediction market outcome mispricings — find markets where real-world outcome is already determined but market price is wrong
Output
A list of prediction market contracts where the outcome is believed to already be determined, including the market name, platform, current price, estimated correct probability, and the magnitude of the mispricing — helping traders identify actionable opportunities.
Example use cases
Example prompt
“Can you scan prediction markets right now for any contracts where the real-world outcome is already determined but the market price hasn't caught up yet — I'm looking for mispricings I can trade on Polymarket or Kalshi?”
Technical details
Endpoint
GEThttps://predict.memoryapi.org/x402/predict/mispricingWhen to prefer
Use this endpoint when you want to find prediction market contracts where the outcome is already determined in the real world but the market price has not yet reflected that reality — ideal for traders seeking low-risk arbitrage. Prefer this over general arbitrage endpoints (which compare prices across platforms) when the edge comes from outcome knowledge rather than cross-platform price differences.
Side effects
- No mispricings found — market returns empty list if all tracked markets are efficiently priced
- Stale data — mispricing may have already been corrected by the time the agent acts
- Payment failure — x402 payment of $0.01 USDC not completed, returns 402
- Rate limiting or upstream API unavailability from Polymarket or Kalshi data sources
- Incorrect mispricing signal if real-world outcome source is lagged or incorrect
Input
{
"q": "bitcoin",
"tag": "crypto",
"limit": 10
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | — |
Output
{
"source": "Polymarket + Open-Meteo weather verification",
"success": true,
"disclaimer": "Not financial advice. Verify independently before trading.",
"all_checked": [
{
"date": "2026-06-03",
"is_past": false,
"outcome": false,
"question": "Will the highest temperature in Tokyo be 26°C or higher on June 3?",
"threshold": 26,
"actual_temp": 20,
"market_prob": 0
},
{
"date": "2026-06-03",
"is_past": false,
"outcome": false,
"question": "Will the highest temperature in Paris be 26°C on June 3?",
"threshold": 26,
"actual_temp": 22.2,
"market_prob": 0
},
{
"date": "2026-06-03",
"is_past": false,
"outcome": false,
"question": "Will the highest temperature in Guangzhou be 29°C or below on June 3?",
"threshold": 29,
"actual_temp": 35.7,
"market_prob": 0
},
{
"date": "2026-06-03",
"is_past": false,
"outcome": false,
"question": "Will the highest temperature in Guangzhou be 30°C on June 3?",
"threshold": 30,
"actual_temp": 35.7,
"market_prob": 0
},
{
"date": "2026-06-03",
"is_past": false,
"outcome": false,
"question": "Will the highest temperature in New York City be between 68-69°F on June 3?",
"threshold": 69,
"actual_temp": 78.08,
"market_prob": 0
},
{
"date": "2026-05-31",
"is_past": true,
"outcome": false,
"question": "Will the highest temperature in Chicago be between 52-53°F on May 31?",
"threshold": 53,
"actual_temp": 66.74000000000001,
"market_prob": 0.001
},
{
"date": "2026-06-01",
"is_past": false,
"outcome": false,
"question": "Will the highest temperature in Guangzhou be 33°C on June 1?",
"threshold": 33,
"actual_temp": 33.7,
"market_prob": 0.25
},
{
"date": "2026-06-02",
"is_past": false,
"outcome": false,
"question": "Will the highest temperature in Tokyo be 26°C on June 2?",
"threshold": 26,
"actual_temp": 23.4,
"market_prob": 0.15
}
],
"opportunities": [
{
"type": "surebet",
"action": "BUY YES at $0.001 AND BUY NO at $0.840 — guaranteed $0.159 profit per $0.841 invested",
"edge_pct": 15.9,
"no_price": 0.84,
"platform": "Polymarket",
"question": "Will CDOriente Petrolero vs. Club Blooming end in a draw?",
"yes_price": 0.001,
"price_diff": 0.16,
"volume_usd": 994.883919,
"example_100": "Invest $84.10: Buy $0.10 YES + $84.00 NO → one side pays $100 → profit $15.90",
"sum_probability": 0.84,
"guaranteed_profit_pct": 15.9
}
],
"markets_checked": 8,
"opportunities_found": 1
}Tags
x402
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