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BlockRun.AI Polymarket/Kalshi Matching Markets
x402
BlockRun.AI Polymarket/Kalshi Matching Markets is a paid API for AI agents from blockrun.ai, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Find equivalent or corresponding prediction markets that exist on both Polymarket and Kalshi for the same underlying event
Price / call$0.005
Success—
StatusUnknown
How this service works
14M+ on-chain transactions. The routing & payment layer for AI. One endpoint routes to every frontier model — payment built in, settled in USDC on Base & Solana. One install for OpenClaw, Claude Code, or Franklin Agent.
Output
Returns matched market pairs showing equivalent prediction markets available on both Polymarket and Kalshi for the same underlying event, including identifiers and relevant metadata for each matched pair
Example use cases
Example prompt
“Can you find me the equivalent markets on both Polymarket and Kalshi for the 2024 US presidential election winner — I want to compare odds across both platforms?”
Technical details
Endpoint
GEThttps://blockrun.ai/api/v1/pm/matching-marketsWhen to prefer
Use this endpoint when you need to cross-reference prediction markets across both Polymarket and Kalshi simultaneously — ideal for arbitrage detection, odds comparison, or liquidity analysis between the two leading prediction market platforms. Prefer this over manually querying each platform's API separately.
Side effects
- No matching market found on one or both platforms for the queried event
- Query too vague to uniquely identify a market
- Market exists on one platform but not the other
- Rate limit or payment failure (402 payment required)
- Empty result set for niche or obscure event topics
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | object | |
| output | object |
Tags
x402
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