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Polymarket vs Kalshi Cross-Platform Prediction Market Gap Finder
x402
Polymarket vs Kalshi Cross-Platform Prediction Market Gap Finder is a paid API for AI agents from clinkagent.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-02).
Returns the biggest probability disagreements between Polymarket and Kalshi on the same prediction market question, including prices, gap sizes, volumes, close dates, and match confidence.
Price / call$0.02
Success—
StatusUnknown
How this service works
Prediction market cross-platform gaps - biggest disagreements between Polymarket and Kalshi on the SAME question: both questions and probabilities, the gap in points, volumes, close dates, urls, match_confidence. Arbitrage research, sanity-checking a price against a second venue, event-risk divergence. From a background snapshot rebuilt every 30 min. ?limit=1-50&min_gap=<pts, default 0>&q=<optional topic>. Check both resolve on the same terms.
Output
A ranked list of matched prediction market questions appearing on both Polymarket and Kalshi, ordered by probability gap. Each entry includes: the question text from both platforms, their respective probabilities, the gap in percentage points, trading volumes, market close dates, direct URLs to each market, and a match confidence score indicating how reliably the two questions refer to the same event.
Example use cases
Arbitrage opportunity scanner
“Find me up to 20 prediction market questions where Polymarket and Kalshi disagree by at least 8 percentage points — I want to spot arbitrage opportunities.”
Price sanity check against second venue
“I'm looking at a Polymarket question on the Fed rate cut — can you pull the cross-platform comparison to see if Kalshi prices it differently and by how much?”
Event risk divergence on a specific topic
“Show me the top 5 biggest gaps between Polymarket and Kalshi on anything related to crypto regulation, so I can see where the two markets diverge most on that topic.”
Technical details
Endpoint
GEThttps://clinkagent.com/pm/gaps?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to compare the same prediction market event across Polymarket and Kalshi simultaneously, especially for arbitrage research, cross-venue price validation, or identifying where the two platforms diverge most in their implied probabilities. Prefer this over querying each platform separately when you want pre-matched, gap-ranked results in a single call. Not suitable for real-time execution — prices are from a snapshot refreshed every 30 minutes.
Side effects
- limit parameter out of range (must be 1-50) returns error or empty result
- min_gap set too high returns empty result set with no matches
- q keyword too niche yields no matched questions
- snapshot may be up to 30 minutes stale — real-time prices may differ
- two questions matched with low confidence may not actually resolve on the same terms
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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