The unofficial Polymarket integrations desk.

Fixed-scope Polymarket & Kalshi integrations · for odds screeners, bet trackers, terminals & embeds

Polymarket is hiring integrations engineers. We do the same work from your side of the API — fixed scope, priced up front, live in weeks.

Your team shipped Kalshi. Polymarket is the half they're stuck on.

Kalshi is a familiar fintech surface — REST, WebSocket, FIX. Polymarket is a crypto system: a central-limit order book settling on Polygon, ERC-1155 conditional tokens, proxy wallets, USDC on-chain. My production trading system runs signal → order on book in 92ms through the same CLOB, CTF settlement, and custody paths your integration needs.

Prediction markets did roughly $45B in volume in June 2026 across Kalshi and Polymarket, and Kalshi's World Cup volume alone ran several times the projected legal U.S. sportsbook handle for the tournament. Your users already trade these venues, whether or not your product covers them.

What we ship

• Fee-exact odds feeds. CLOB WebSocket depth normalized to American odds, with Kalshi contract fees and Polymarket spread and gas priced in — not mid-price approximations.
• Position & settlement tracking. Read a user's Polymarket positions from the chain and the CLOB, map market resolutions, and feed your P/L, CLV, and portfolio analytics — data you can't get through account-linking.
• EV / arb math for thin books. Depth-aware sizing, per-venue fee models, and settlement-rule checks between venues.
• Embed & execution rails. Polymarket builder-code integration with your own fee on routed notional, plus gasless relayer flows and guarded custody paths.

The economics

Polymarket's builder program lets your product charge its own fee on every order it routes, so the integration can pay for itself in routed volume. We can also structure part of the engagement as revenue share instead of fees.

How it starts

A prepaid five-day integration audit: we go through your product, your data layer, and the venue surfaces you're missing, and hand you a written build plan with a fixed quote — $2,500, refunded if it surfaces nothing worth building. Most engagements start there; the audit document doubles as your team's onboarding if you build it in-house instead.