A Kalshi trading bot for automated event contracts.
A Kalshi trading bot automates Yes/No event-contract orders through Kalshi's official API. This one streams the order book, scores signals, mirrors ranked traders, and runs every order through a risk gate before it reaches the exchange — using your own API key, on your own regulated account.
What runs inside the Kalshi trading engine.
Six modules sit between Kalshi's API and your strategy. The feed decodes every order-book change; the signal layer scores it; the risk gate vetoes anything outside policy — all before a single order reaches the matching engine.
FEED
Subscribes to Kalshi's WebSocket order book and trade feed. Decodes every Yes/No tick across the series you track, with REST polling fallback if the socket drops.
SIGNAL
Scores each market from momentum, spread, and resolution proximity. You choose the strategy — signal-driven, leaderboard mirror, or a fixed rules set — and the threshold that triggers an order.
RISK GATE
Per-trade hard cap, daily-loss circuit breaker, exposure ceiling per series, and a liquidity floor — every one evaluated before submission, never after a bad fill.
SIZER
Translates your bankroll and contract price into a contract count. Caps stake per market so a single event resolving No cannot blow the account.
EXECUTOR
Places limit orders over Kalshi's REST API with optional take-profit and stop brackets. Re-prices toward the book to lift fill rate without crossing the spread blindly.
LEDGER
Logs every signal, order, fill, and settlement with timestamps. The audit trail reconciles against Kalshi's own fills so your P&L is verifiable, not estimated.
From API key to first automated order in about two minutes.
The bot never holds your money. You paste a read-and-trade Kalshi API key, set policy, and arm it. Every step is reversible, and you can revoke the key from your Kalshi account at any moment.
Mirror ranked Kalshi traders, sized to your own bankroll.
Pick traders from a ranking calibrated against resolved Kalshi markets — win rate, realized profit, sample size, and category focus, not self-reported claims. The reasoning behind ranking forecasters is grounded in the academic prediction-market literature.
| Rank | Trader | Focus | Win | Realized | 7D | Trades | Action |
|---|---|---|---|---|---|---|---|
| 01 | forecaster_01 | ECONOMICS | 71.4% | +$48,210 | 612 | [mirror] | |
| 02 | quant_macro | FINANCIALS | 64.9% | +$39,880 | 1,204 | [mirror] | |
| 03 | weather_edge | WEATHER | 77.2% | +$31,540 | 904 | [mirror] | |
| 04 | rates_desk | ECONOMICS | 62.1% | +$27,910 | 743 | [mirror] | |
| 05 | poll_signal | POLITICS | 58.6% | +$24,330 | 1,389 | [mirror] | |
| 06 | vol_harvest | FINANCIALS | 66.8% | +$21,470 | 587 | [mirror] | |
| 07 | climate_line | CLIMATE | 69.3% | +$18,240 | 478 | [mirror] | |
| 08 | event_scout | SPORTS | 61.0% | +$15,090 | 1,012 | [mirror] |
Ranking shown is an illustrative sample of leaderboard structure. Past performance does not predict future results.
Three plans. All API-key only. All cancellable.
Every tier connects through your own Kalshi account with a trade-scoped API key. The bot can place and cancel orders — it can never withdraw your funds.
For new automated traders running a single careful strategy.
- ▸ Mirror up to 3 traders
- ▸ Per-trade hard cap
- ▸ Daily-loss circuit breaker
- ▸ Email + chat support
For traders running multiple series with active exposure control.
- ▸ Mirror up to 15 traders
- ▸ Liquidity-floor filtering
- ▸ Stop + take-profit brackets
- ▸ Priority support, full analytics
For teams running institutional rules across many Kalshi series.
- ▸ Unlimited mirrored traders
- ▸ Custom risk-policy engine
- ▸ Webhook + API integration
- ▸ Dedicated solutions engineer
Kalshi bot Q&A.
Straight answers about how a Kalshi trading bot works, what it can and cannot touch, and where the real limits are. The Kalshi API documentation is the authoritative source.
What is a Kalshi trading bot?
Software that places and manages Yes/No event-contract orders on the Kalshi exchange through Kalshi's official API. It reacts to price signals or mirrors selected traders and submits orders against your own Kalshi account, with risk limits checked before every order.
Does the bot have access to my Kalshi funds?
No. It connects with a read-and-trade Kalshi API key you generate and can revoke at any time. It can place and cancel orders but cannot withdraw money. Your funds stay inside your regulated Kalshi account.
Is Kalshi automated trading legal in the US?
Kalshi is a CFTC-regulated designated contract market and publishes a public API meant for programmatic trading. Using a bot to trade your own account through that API is permitted within Kalshi's API terms, which you are responsible for following.
How fast does the bot react?
It streams order-book and trade updates over Kalshi's WebSocket feed and submits orders over REST. Detection-to-submission typically completes in well under a second; final fill time still depends on Kalshi's matching engine and market liquidity.
What does a Kalshi trading bot cost?
Three monthly plans: Scout $59, Operator $149, and Desk $349. Every tier is non-custodial API-key access and can be cancelled at any time.
Can I copy or mirror other Kalshi traders?
Yes. You can mirror a ranked list of public traders, sized to your own bankroll, with a per-trade cap, liquidity floor, and category filter so one event cannot dominate your exposure.
Which Kalshi markets can the bot trade?
Any Yes/No market Kalshi lists — economics, financials, politics, weather, and climate series among them. You set category filters and a liquidity floor so the bot only acts in markets deep enough for your size.
What are the practical risks?
Event contracts can resolve fully against you, returning zero on staked capital. Markets carry liquidity risk and resolution risk, and an automated strategy can lose quickly. Per-trade caps and daily-loss limits are a baseline, not a guarantee. Nothing here is financial advice.
$ kbot init --your-key
About two minutes from this page to your first automated Kalshi order. Your strategy, your risk policy, your API key — running on your own regulated account, never a custodial deposit.