The Polymarket arbitrage agent
& Kalshi arbitrage agent —
prediction market arbitrage
detected, net of fees.
arbitrage-agent matches the same outcome across Kalshi and Polymarket and shows you the spreads that are open right now, net of fees — both legs ready to place from a step-by-step guide. Automated execution is in final testing. No strategies to tune.
Access is open — subscribe in a minute and start getting signals
Starter $19/month early-bird until 27 Oct 2026 (UTC), then $29/month
Live feed of cross-platform spreads, net of fees · step-by-step guide for both legs · dry-run P&L · 7 days of history. Starter has no Telegram or email alerts.
Net edges are typically well under 1% per position. Your capital stays committed until the market resolves. See the live numbers.
NON-CUSTODIAL BY DESIGN — YOUR CAPITAL NEVER LEAVES THE VENUES
Three things
every other agent misses.
Prediction-market arbitrage is deceptively hard. The spreads are real, the math is trivial, and the execution is where most systems bleed out. This is what we built instead.
Same outcome, different English.
"Fed cuts by 25bps in May" on Kalshi is "Will the Fed cut rates at the May FOMC?" on Polymarket. Text-match doesn't work. OpenAI embeddings + a custom reranker link thousands of titles across venues — and every pair is validated before it goes live.
Price-driven, not poll-driven.
A live order-book feed on Polymarket, a continuous poll on Kalshi. On every price change, only the affected pairs are re-evaluated — not the whole book. That's how thousands of markets stay covered without missing a beat.
Both legs, or neither.
The execution engine fires Kalshi and Polymarket orders in parallel with a circuit breaker — if one leg fails, the other unwinds automatically. It's in final testing on our own capital and rolls out to Operator subscribers soon; until then, every signal shows you both legs to place in one screen.
From market tick
to actionable signal — in four steps.
You deposit capital on both venues and set your threshold. Steps 1–3 happen automatically, forever; step 4 is yours today — and automated soon.
Ingest
Polymarket prices stream in as they move; Kalshi is polled continuously. Markets filtered by volume, time-to-close, liquidity depth.
Match
Embedding-based pairing identifies the same real-world outcome across venues, despite wildly different phrasing.
Evaluate
Reactive engine computes net-of-fees spread and ROI on every price tick. Operator adds Kelly sizing within your bankroll caps.
Execute
Open the step-by-step guide — both legs, exact prices. Operator adds Telegram/email alerts. Automated parallel execution with circuit breaker: in final testing, coming to Operator first.
Two exchanges.
One P&L curve.
Tune it like
an instrument.
Every parameter — spread floor, Kelly fraction, exposure caps, market filters, fee lookups — is live-editable in the terminal or via API. Defaults are sane; expert knobs are there when you want them.
Pay a flat fee. Keep the spread.
Capital stays on-venue. We charge a monthly platform fee and nothing on P&L — the upside is yours.
See every spread arbitrage-agent detects, with a step-by-step guide to book it yourself. No keys required.
- Live opportunity feed
- Step-by-step execution guides
- Dry-run P&L tracking
- Maker/taker execution sequencing
- Mark-to-market on open positions
- 7 days of history
- Web terminal
Refer a friend — both save $3/mo
Your personal referral code is in your account once you subscribe. If you joined the waitlist, you already have it by email.
The full engine. Alerts on every spread — and first access to automated execution when it ships.
- Everything in Starter
- Telegram alerts · email digest
- Kelly sizing & risk caps
- Directional divergence signals
- Auto-execution — first access (in testing)
- Unlimited trade history & CSV
- Priority support
Refer a friend — both save $3/mo
Your personal referral code is in your account once you subscribe. If you joined the waitlist, you already have it by email.
Stop watching spreads.
Start booking them.
Signals start at $29/mo. Operator (Telegram/email alerts and first access to automated execution) is coming soon. Cancel any day — your capital stays on-venue, never with us.
Frequently Asked Questions
Everything you need to know about the Polymarket & Kalshi arbitrage agent.