agentutility(7)$ man polymarket-kalshi-arbitrage
/polymarket-kalshi-arbitrage
PRICE / CALL
$0.02
USDC · base mainnet · scheme: exact
METHOD
POST
CLUSTER
edgefinanceCATEGORY
uncategorized
STATUS
● live
NAME
polymarket-kalshi-arbitrage — scans for arbitrage between polymarket and kalshi prediction markets
SYNOPSIS
POST https://x402.agentutility.ai/polymarket-kalshi-arbitrage
Content-Type: application/json
X-PAYMENT: <signed-transferWithAuthorization>
{ ... }↳ first call →
402 Payment Required. Sign USDCtransferWithAuthorization, retry with theX-PAYMENT header.DESCRIPTION
Scans for arbitrage between Polymarket and Kalshi prediction markets. Pulls active markets from both venues, fuzzy-matches by title (Jaccard token overlap), and reports pairs whose implied YES probabilities diverge beyond a configurable threshold. Output is data-only: spread metrics, no trade execution. Useful for cross-market sentiment timing and signal triangulation. Use it as a cross-venue spread scanner, event price arbitrage detector, or Polymarket vs Kalshi comparison.
INPUT — request schema
| property | type | description | req? |
|---|---|---|---|
| min_spread | number | Minimum |p_poly - p_kalshi| spread to report. 0-1. Default 0.05. | optional |
| min_match_score | number | Minimum Jaccard token overlap to treat two titles as the same event. 0-1. Default 0.4. | optional |
| scan_limit | number | Max markets to pull from each venue. 10-500. Default 100. | optional |
| category | string | Optional Polymarket category filter (substring). | optional |
OUTPUT — response shape
| field | type | description |
|---|---|---|
| pairs | string | Array of matched Polymarket/Kalshi market pairs with titles, YES probabilities, spread, and venue links. |
| pair_count | string | Number of cross-venue market pairs whose implied YES probability spread exceeded the threshold. |
| attribution | string | Source credit string naming Polymarket and Kalshi as the upstream prediction market data providers. |
EXAMPLES — two ways to call
EXAMPLE 1 · curl
curl -X POST https://x402.agentutility.ai/polymarket-kalshi-arbitrage \
-H 'Content-Type: application/json' \
-d '{ }'first response =
402 Payment Required with payment requirements; sign + retry with X-PAYMENT.EXAMPLE 2 · mcp
# Install the MCP package for this endpoint's cluster npx -y @agentutility/mcp-<cluster> # Required: EVM private key with USDC on Base export X402_PRIVATE_KEY=0x... # Then call the polymarket-kalshi-arbitrage tool from your MCP-aware agent.
MCP server handles payment automatically — your coding agent just calls the tool by name.
METADATA
- tags
- edge-financeprediction-marketsarbitragepolymarketkalshispread-scannercross-venuemarket-arbitrage
- methods
- POST
- cluster
- edgefinance
- price
- $0.02 USDC per call
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SEE ALSO