{"uid":"cap_Jv7XRFCE4pyOkR9VXCz8k","slug":"x402-prediction-market-divergence-27f37e76","name":"x402 Prediction Market Divergence","description":"Find prediction-market questions priced differently on Polymarket vs. Kalshi — a cross-platform divergence signal built from data no single-platform competitor has","url":"https://x402tap.com/api/prediction-arb","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{"q":{"type":"string","description":"Optional keyword filter on the matched question text"},"limit":{"type":"string","description":"Max matches to return, 1-25 (default 10)"},"minDivergencePct":{"type":"string","description":"Minimum probability-point divergence to include, 0-100 (default 5)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_fGOOsE6MgYkjynPl09pCy","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Finds prediction-market questions where Polymarket and Kalshi show meaningfully different implied probabilities, surfacing cross-platform arbitrage signals.","exampleAgentPrompt":"Can you find prediction market questions where Polymarket and Kalshi disagree by at least 10 percentage points — filter for anything related to 'election' and show me the top 15 results?","exampleUseCases":[{"title":"Political event arbitrage scanner","prompt":"Show me all prediction markets about the 2024 election where Polymarket and Kalshi differ by at least 8 percentage points — give me up to 20 results."},{"title":"Economic indicator cross-platform check","prompt":"Are there any prediction markets about inflation or interest rates where Polymarket and Kalshi are priced significantly differently right now? Show me results with at least a 5-point divergence."},{"title":"Sports or entertainment bet discrepancy","prompt":"Find prediction markets mentioning 'Oscar' or 'Super Bowl' where the two platforms disagree the most — just show me the top 5 biggest divergences."}],"resultDescription":"A list of matched prediction-market questions with their Polymarket and Kalshi implied probabilities, the calculated divergence in percentage points, and identifying metadata for each market — sorted by divergence or relevance.","failureModes":["No markets meet the minDivergencePct threshold — returns empty results list","Invalid query parameter type causes 400 error","Limit outside 1-25 range rejected with validation error","Upstream Polymarket or Kalshi data temporarily unavailable causing stale or partial results","Payment not confirmed resulting in 402 response blocking the request"],"whenToPreferThis":"Choose this endpoint when you need cross-platform prediction market divergence data that no single-platform API can provide — it uniquely combines Polymarket and Kalshi data to surface arbitrage signals. Prefer it over querying each platform separately when the goal is to find discrepancies rather than detail on a specific market.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:31:53.879Z","isFirstParty":false}