$ man polymarket-kalshi-arbitrage
/polymarket-kalshi-arbitrage(1)
PRICE / CALL
$0.02
USDC · base mainnet · scheme: exact
METHOD
POST
CLUSTER
edgefinanceCATEGORY
uncategorized
STATUS
● live
NAME
polymarket-kalshi-arbitrage — polymarket × kalshi arbitrage scanner / cross-venue prediction market spread / event price arbitrage detector / polymarket vs kalshi comp…
SYNOPSIS
POST https://x402.org/v1/polymarket-kalshi-arbitrage
Content-Type: application/json
X-PAYMENT: <signed-transferWithAuthorization>
{ ... }↳ first call →
402 Payment Required. Sign USDCtransferWithAuthorization, retry with theX-PAYMENT header.DESCRIPTION
Polymarket × Kalshi arbitrage scanner / cross-venue prediction market spread / event price arbitrage detector / Polymarket vs Kalshi comparison. 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.
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.org/v1/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 once claude mcp add x402 --command "npx x402-deployer-mcp" # then ask Claude Code: # "use the polymarket-kalshi-arbitrage tool to ..."
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
ADJACENT — other endpoints in edgefinance
| endpoint | description | price |
|---|---|---|
| bls-occupational-stats | BLS Public Data API — wages, employment levels, growth by series ID. | $0.02 |
| earnings-calendar | Earnings calendar derived from SEC 8-K Item 2.02, 10-Q, 10-K, NT 10-Q, NT 10-K filings. | $0.03 |
| earnings-call-transcribe | Earnings call transcriber. | $0.03 |
| earnings-transcript | Earnings call transcript generator. | $0.03 |
| fda-calendar | FDA Advisory Committee meeting calendar. | $0.03 |
| trademark-search | Trademark search / USPTO trademark lookup / TSDR / federal trademark database. | $0.03 |
| uspto-trademark-search | USPTO trademark status / TSDR lookup. | $0.03 |
| insider-form-4 | SEC Form 4 (insider transactions) normalizer. | $0.01 |
SEE ALSO