Cross-venue arbitrage
Arbitrage
Cross-venue arbitrage
Find fee-adjusted Kalshi ↔ Polymarket arbitrage opportunities.
GET
Cross-venue arbitrage
Cross-exchange BTC interval arbitrage scanner (Kalshi ↔ Polymarket). Returns a
JSON array sorted by
net_cents descending.
Pairs active windows on matching interval_code values (5m, 15m, 1h, 24h,
1w) and returns fee-adjusted edges where buying YES on one venue and NO on the
other costs less than $1.
Scope is BTC interval and matched binary markets. opinion is always null.
Request
Query parameters
Minimum net profit after fees, in cents.
5m, 15m, 1h, 24h, or 1w. Omit for all supported intervals.When
true, attach top ask levels per leg under orderbook.Drop pairs when either snapshot is older than this.
Max start/end time skew when pairing windows.
Max opportunities returned (1–100).
Response
Returns a JSON array of opportunity objects.Matched event identifier.
Interval for the window when applicable.
Venue to buy YES (
kalshi or polymarket).Venue to buy NO.
Gross edge in cents before fees.
Estimated taker fees in cents.
Net edge after fees in cents.
Return on capital for the paired legs.