--- url: "https://predictiontoolkit.com/tools/kalshi/" publisher: "PredictionToolkit" dateModified: "2026-11-03" --- [← Prediction platforms]() Platform # Kalshi: Event Contracts, Order Books and Exchange API Kalshi is an event exchange with topic discovery, related-outcome groups, price charts and account tools. Web, mobile and developer interfaces provide ways to research contracts and manage supported orders; exact rules and access eligibility remain contract- and account-specific. [**4.0**/ 5Editorial rating]() [Editorial assessment]() [Open Kalshi]() kalshi.com **Available on:** Web · API · Mobile app **Pricing:** [See plans and costs ↓]() [Screenshots]() [Explore alternatives]() **Availability: public** [Prediction platforms]() [Data APIs]() +1 more [Parlays]() ## Screenshots and interface Product preview1 / 2 Public market discovery and chart context. ## What is Kalshi? Read the resolution source, threshold, observation window and payout timeline before interpreting an event price. An order book shows resting liquidity, but the headline probability may differ from the price available for your full size. Manage working orders and positions separately, including any unfilled remainder. A limit order that matches immediately is a taker; maker treatment and fees depend on the series. Designated series can charge maker fees when resting orders fill. The event-contract fee schedule should be kept separate from Kalshi's perpetual-futures margin and fee rules, and a broker route can add broker charges. ### Who it is for - Trading event contracts directly through an exchange. - Researching weather or economic-release contracts. - Developing market-data and account integrations through an API. ## Markets and platform rules - **Topic discovery** Filter a broad market catalog by subject. - **Related market groups** Compare thresholds and related event outcomes. - **Price and probability charts** Review how a market's displayed values have changed over time. - **Order-book depth** Inspect available prices and resting liquidity before choosing size. - **Limit-order management** Choose a price and manage orders that remain working. - **Portfolio views** Distinguish positions, balances and order history. - **Combos** Access supported contracts spanning multiple events. - **Developer API** Build documented market-data and account workflows. - **Incentive programs** Inspect the liquidity programs that apply to particular markets. ## Market participation workflows ### Research a release Read the contract's named source, threshold, observation window and payout timeline. ### Work an order Inspect depth, set price and size, and monitor any remainder that has not filled. ### Compare across venues Match contract rules and include the fees for the specific series before calculating a price gap. ## Pricing and total cost Separate exchange event-contract charges from funding and broker costs. The schedule lists no membership or settlement fee and free ACH deposits and withdrawals; other payment rails or a broker may change the total. For execution, use M × 0.07 × C × P × (1−P) for general taker fees and, on designated series, M × 0.0175 × C × P × (1−P) for maker fees, applying the schedule's rounding. Other resting orders have a zero maker multiplier. ## Access and participation 1. Find the exact event contract. 2. Read its rules and settlement source. 3. Complete the account's eligibility and verification requirements. 4. Choose a supported funding method. 5. Inspect depth and fee information beside the order. 6. Manage open orders separately from positions. ## Useful links ### What to check - A headline probability may differ from the price available for the full order size. - Perpetual futures have separate margin and fee rules. - Orders through a broker can incur additional broker charges. - A resting limit order is not universally maker-fee-free; the series and fill status matter. - Maker fees vary by series, and a limit order that matches immediately is a taker. A closer look ## Ratings & reviews Editorial rating **4.0**/ 5 0 user reviews PredictionToolkit editorial ### Our take on Kalshi Kalshi's books and published resolution rules let a researcher examine what a contract represents, with developer interfaces for further analysis. Moving from research to trading still requires matching the contract and account route to eligibility and fees: maker charges depend on the series, and an immediately matching limit order is a taker. **Assessment criteria:** Task usefulness, documented scope, setup clarity, and access and cost transparency. **Assessment date:** 2026-10-05 **Documentation reviewed:** 2026-10-02 Documentation-based assessment. [How we rate]() ### User reviews 0 The main score switches to user ratings after 5 published reviews. **Be the first to share your experience** A specific example helps the next person choose the right tool. ## Related tools [Browse category]() ![Duel Duck public duel cards on its Solana venue]() ![Duel Duck logo]()[Duel Duck]() Platform**3.5**Editorial A separate Solana prediction venue for community-created yes/no duels and embeddable event questions. - Access Web Also in Related Prediction Market Platforms. ![Wethr product overview]() ![Wethr logo]()[Wethr]() Data feed**3.5**Editorial Weather-market research combining station observations, forecast-model comparisons, bias tools, alerts and tiered APIs. - Access Web · API Research weather inputs for the relevant event contracts. ![Parity product overview]() ![Parity logo]()[Parity]() Trading terminal**3.0**Editorial Compare prices and visible book sizes while keeping Polymarket, Kalshi and Polymarket US distinct. - Access Web Compare order books across different venues. ## Guides and workflows - [Kalshi API access]() ## Frequently asked questions about Kalshi ### Are all resting orders fee-free? No. Designated series charge maker fees when the resting order fills. ### Is there a settlement fee? The event-contract fee schedule lists none. ### Can developers access the exchange? Yes. The exchange provides a documented API. ### Does canceling an unfilled resting order incur a maker fee? The reviewed help page says it does not. In this profile