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x402 Prediction Market Divergence
x402
x402 Prediction Market Divergence is a paid API for AI agents from x402tap.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Finds prediction-market questions where Polymarket and Kalshi show meaningfully different implied probabilities, surfacing cross-platform arbitrage signals.
Price / call$0.005
Success—
StatusUnknown
How this service works
Find prediction-market questions priced differently on Polymarket vs. Kalshi — a cross-platform divergence signal built from data no single-platform competitor has
Output
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.
Example use cases
Political event arbitrage scanner
“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.”
Economic indicator cross-platform check
“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.”
Sports or entertainment bet discrepancy
“Find prediction markets mentioning 'Oscar' or 'Super Bowl' where the two platforms disagree the most — just show me the top 5 biggest divergences.”
Technical details
Endpoint
GEThttps://x402tap.com/api/prediction-arbWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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