Kalshi is a federally regulated exchange where users can trade directly on the outcomes of future events—prediction markets. Kalshi’s robust API and Aptlystar integration enable agents and workflows to programmatically access all aspects of the platform, supporting everything from research and analytics to automated trading and monitoring.
With Kalshi’s integration in Aptlystar, you can:
- Market & Event Data: Search, filter, and retrieve real-time and historical data for markets and events; fetch granular details on market status, series, event groupings, and more.
- Account & Balance Management: Access account balances, available funds, and monitor real-time open positions.
- Order & Trade Management: Place new orders, cancel existing ones, view open orders, retrieve a live orderbook, and access complete trade histories.
- Execution Analysis: Fetch recent trades, historical fills, and candlestick data for backtesting or market structure research.
- Monitoring: Check exchange-wide or series-level status, receive real-time updates about market changes or trading halts, and automate responses.
- Automation Ready: Build end-to-end automated agents and dashboards that consume, analyze, and trade on real-world event probabilities.
By using these unified tools and endpoints, you can seamlessly incorporate Kalshi’s prediction markets, live trading capabilities, and deep event data into your AI-powered applications, dashboards, and workflows—enabling sophisticated, automated decision-making tied to real-world outcomes.
Integrate Kalshi prediction markets into the workflow. Can get markets, market, events, event, balance, positions, orders, orderbook, trades, candlesticks, fills, series, exchange status, and place/cancel/amend trades.
Retrieve a list of prediction markets from Kalshi with all filtering options (V2 - full API response)
| Parameter | Type | Required | Description |
|---|
status | string | No | Filter by market status: "unopened", "open", "closed", or "settled" |
seriesTicker | string | No | Filter by series ticker (e.g., "KXBTC", "INX", "FED-RATE") |
eventTicker | string | No | Filter by event ticker (e.g., "KXBTC-24DEC31", "INX-25JAN03") |
minCreatedTs | number | No | Minimum created timestamp in Unix seconds (e.g., 1704067200) |
maxCreatedTs | number | No | Maximum created timestamp in Unix seconds (e.g., 1704153600) |
minUpdatedTs | number | No | Minimum updated timestamp in Unix seconds (e.g., 1704067200) |
minCloseTs | number | No | Minimum close timestamp in Unix seconds (e.g., 1704067200) |
maxCloseTs | number | No | Maximum close timestamp in Unix seconds (e.g., 1704153600) |
minSettledTs | number | No | Minimum settled timestamp in Unix seconds (e.g., 1704067200) |
maxSettledTs | number | No | Maximum settled timestamp in Unix seconds (e.g., 1704153600) |
tickers | string | No | Comma-separated list of tickers (e.g., "KXBTC-24DEC31,INX-25JAN03") |
mveFilter | string | No | MVE filter: "display" or "all" |
limit | string | No | Number of results to return (1-1000, default: 100) |
cursor | string | No | Pagination cursor from previous response for fetching next page |
| Parameter | Type | Description |
|---|
markets | array | Array of market objects with all API fields |
↳ ticker | string | Unique market ticker identifier |
↳ event_ticker | string | Parent event ticker |
↳ market_type | string | Market type (binary, etc.) |
↳ title | string | Market title/question |
↳ subtitle | string | Market subtitle |
↳ yes_sub_title | string | Yes outcome subtitle |
↳ no_sub_title | string | No outcome subtitle |
↳ open_time | string | Market open time (ISO 8601) |
↳ close_time | string | Market close time (ISO 8601) |
↳ expiration_time | string | Contract expiration time |
↳ status | string | Market status (open, closed, settled, etc.) |
↳ yes_bid | number | Current best yes bid price in cents |
↳ yes_ask | number | Current best yes ask price in cents |
↳ no_bid | number | Current best no bid price in cents |
↳ no_ask | number | Current best no ask price in cents |
↳ last_price | number | Last trade price in cents |
↳ previous_yes_bid | number | Previous yes bid |
↳ previous_yes_ask | number | Previous yes ask |
↳ previous_price | number | Previous last price |
↳ volume | number | Total volume (contracts traded) |
↳ volume_24h | number | 24-hour trading volume |
↳ liquidity | number | Market liquidity measure |
↳ open_interest | number | Open interest (outstanding contracts) |
↳ result | string | Settlement result (yes, no, null) |
↳ cap_strike | number | Cap strike for ranged markets |
↳ floor_strike | number | Floor strike for ranged markets |
↳ category | string | Market category |
cursor | string | Pagination cursor for fetching more results |
Retrieve details of a specific prediction market by ticker (V2 - full API response)
| Parameter | Type | Required | Description |
|---|
ticker | string | Yes | Market ticker identifier (e.g., "KXBTC-24DEC31", "INX-25JAN03-T4485.99") |
| Parameter | Type | Description |
|---|
market | object | Market object with all API fields |
↳ ticker | string | Market ticker |
↳ event_ticker | string | Event ticker |
↳ market_type | string | Market type |
↳ title | string | Market title |
↳ subtitle | string | Market subtitle |
↳ yes_sub_title | string | Yes outcome subtitle |
↳ no_sub_title | string | No outcome subtitle |
↳ open_time | string | Market open time |
↳ close_time | string | Market close time |
↳ expected_expiration_time | string | Expected expiration time |
↳ expiration_time | string | Expiration time |
↳ latest_expiration_time | string | Latest expiration time |
↳ settlement_timer_seconds | number | Settlement timer in seconds |
↳ status | string | Market status |
↳ response_price_units | string | Response price units |
↳ notional_value | number | Notional value |
↳ tick_size | number | Tick size |
↳ yes_bid | number | Current yes bid price |
↳ yes_ask | number | Current yes ask price |
↳ no_bid | number | Current no bid price |
↳ no_ask | number | Current no ask price |
↳ last_price | number | Last trade price |
↳ previous_yes_bid | number | Previous yes bid |
↳ previous_yes_ask | number | Previous yes ask |
↳ previous_price | number | Previous price |
↳ volume | number | Total volume |
↳ volume_24h | number | 24-hour volume |
↳ liquidity | number | Market liquidity |
↳ open_interest | number | Open interest |
↳ result | string | Market result |
↳ cap_strike | number | Cap strike |
↳ floor_strike | number | Floor strike |
↳ can_close_early | boolean | Can close early |
↳ expiration_value | string | Expiration value |
↳ category | string | Market category |
↳ risk_limit_cents | number | Risk limit in cents |
↳ strike_type | string | Strike type |
↳ rules_primary | string | Primary rules |
↳ rules_secondary | string | Secondary rules |
↳ settlement_source_url | string | Settlement source URL |
↳ custom_strike | object | Custom strike object |
↳ underlying | string | Underlying asset |
↳ settlement_value | number | Settlement value |
↳ cfd_contract_size | number | CFD contract size |
↳ yes_fee_fp | number | Yes fee (fixed-point) |
↳ no_fee_fp | number | No fee (fixed-point) |
↳ last_price_fp | number | Last price (fixed-point) |
↳ yes_bid_fp | number | Yes bid (fixed-point) |
↳ yes_ask_fp | number | Yes ask (fixed-point) |
↳ no_bid_fp | number | No bid (fixed-point) |
↳ no_ask_fp | number | No ask (fixed-point) |
Retrieve a list of events from Kalshi with optional filtering (V2 - exact API response)
| Parameter | Type | Required | Description |
|---|
status | string | No | Filter by event status: "open", "closed", or "settled" |
seriesTicker | string | No | Filter by series ticker (e.g., "KXBTC", "INX", "FED-RATE") |
withNestedMarkets | string | No | Include nested markets in response: "true" or "false" |
withMilestones | string | No | Include milestones in response: "true" or "false" |
minCloseTs | number | No | Minimum close timestamp in Unix seconds (e.g., 1704067200) |
limit | string | No | Number of results to return (1-200, default: 200) |
cursor | string | No | Pagination cursor from previous response for fetching next page |
| Parameter | Type | Description |
|---|
events | array | Array of event objects |
↳ event_ticker | string | Unique event ticker identifier |
↳ series_ticker | string | Parent series ticker |
↳ title | string | Event title |
↳ sub_title | string | Event subtitle |
↳ mutually_exclusive | boolean | Whether markets are mutually exclusive |
↳ category | string | Event category |
↳ strike_date | string | Strike/settlement date |
↳ status | string | Event status |
milestones | array | Array of milestone objects (if requested) |
↳ event_ticker | string | Event ticker |
↳ milestone_type | string | Milestone type |
↳ milestone_date | string | Milestone date |
↳ milestone_title | string | Milestone title |
cursor | string | Pagination cursor for fetching more results |
Retrieve details of a specific event by ticker (V2 - exact API response)
| Parameter | Type | Required | Description |
|---|
eventTicker | string | Yes | Event ticker identifier (e.g., "KXBTC-24DEC31", "INX-25JAN03") |
withNestedMarkets | string | No | Include nested markets in response (true/false) |
| Parameter | Type | Description |
|---|
event | object | Event object with full details matching Kalshi API response |
↳ event_ticker | string | Event ticker |
↳ series_ticker | string | Series ticker |
↳ title | string | Event title |
↳ sub_title | string | Event subtitle |
↳ mutually_exclusive | boolean | Mutually exclusive markets |
↳ category | string | Event category |
↳ collateral_return_type | string | Collateral return type |
↳ strike_date | string | Strike date |
↳ strike_period | string | Strike period |
↳ available_on_brokers | boolean | Available on brokers |
↳ product_metadata | object | Product metadata |
↳ markets | array | Nested markets (if requested) |
Retrieve your account balance and portfolio value from Kalshi (V2 - exact API response)
| Parameter | Type | Required | Description |
|---|
keyId | string | Yes | Your Kalshi API Key ID |
privateKey | string | Yes | Your RSA Private Key (PEM format) |
| Parameter | Type | Description |
|---|
balance | number | Account balance in cents |
portfolio_value | number | Portfolio value in cents |
updated_ts | number | Unix timestamp of last update (milliseconds) |
Retrieve your open positions from Kalshi (V2 - exact API response)
| Parameter | Type | Required | Description |
|---|
keyId | string | Yes | Your Kalshi API Key ID |
privateKey | string | Yes | Your RSA Private Key (PEM format) |
ticker | string | No | Filter by market ticker (e.g., "KXBTC-24DEC31") |
eventTicker | string | No | Filter by event ticker, max 10 comma-separated (e.g., "KXBTC-24DEC31,INX-25JAN03") |
countFilter | string | No | Filter by count: "all", "positive", or "negative" (default: "all") |
subaccount | string | No | Subaccount identifier to get positions for |
limit | string | No | Number of results to return (1-1000, default: 100) |
cursor | string | No | Pagination cursor from previous response for fetching next page |
| Parameter | Type | Description |
|---|
market_positions | array | Array of market position objects |
↳ ticker | string | Market ticker |
↳ event_ticker | string | Event ticker |
↳ event_title | string | Event title |
↳ market_title | string | Market title |
↳ position | number | Net position (positive=yes, negative=no) |
↳ market_exposure | number | Maximum potential loss in cents |
↳ realized_pnl | number | Realized profit/loss in cents |
↳ total_traded | number | Total contracts traded |
↳ resting_orders_count | number | Number of resting orders |
↳ fees_paid | number | Total fees paid in cents |
event_positions | array | Array of event position objects |
↳ event_ticker | string | Event ticker |
↳ event_exposure | number | Event-level exposure in cents |
↳ realized_pnl | number | Realized P&L in cents |
↳ total_cost | number | Total cost basis in cents |
cursor | string | Pagination cursor for fetching more results |
Retrieve your orders from Kalshi with optional filtering (V2 with full API response)
| Parameter | Type | Required | Description |
|---|
keyId | string | Yes | Your Kalshi API Key ID |
privateKey | string | Yes | Your RSA Private Key (PEM format) |
ticker | string | No | Filter by market ticker (e.g., "KXBTC-24DEC31") |
eventTicker | string | No | Filter by event ticker, max 10 comma-separated (e.g., "KXBTC-24DEC31,INX-25JAN03") |
status | string | No | Filter by order status: "resting", "canceled", or "executed" |
minTs | string | No | Minimum timestamp filter (Unix timestamp, e.g., "1704067200") |
maxTs | string | No | Maximum timestamp filter (Unix timestamp, e.g., "1704153600") |
subaccount | string | No | Subaccount identifier to filter orders |
limit | string | No | Number of results to return (1-200, default: 100) |
cursor | string | No | Pagination cursor from previous response for fetching next page |
| Parameter | Type | Description |
|---|
orders | array | Array of order objects with full API response fields |
↳ order_id | string | Unique order identifier |
↳ user_id | string | User ID |
↳ client_order_id | string | Client-provided order ID |
↳ ticker | string | Market ticker |
↳ side | string | Order side (yes/no) |
↳ action | string | Order action (buy/sell) |
↳ type | string | Order type (limit/market) |
↳ status | string | Order status (resting, canceled, executed) |
↳ yes_price | number | Yes price in cents |
↳ no_price | number | No price in cents |
↳ fill_count | number | Number of contracts filled |
↳ remaining_count | number | Remaining contracts to fill |
↳ initial_count | number | Initial order size |
↳ taker_fees | number | Taker fees paid in cents |
↳ maker_fees | number | Maker fees paid in cents |
↳ created_time | string | Order creation time (ISO 8601) |
↳ expiration_time | string | Order expiration time |
↳ last_update_time | string | Last order update time |
cursor | string | Pagination cursor for fetching more results |
Retrieve details of a specific order by ID from Kalshi (V2 with full API response)
| Parameter | Type | Required | Description |
|---|
keyId | string | Yes | Your Kalshi API Key ID |
privateKey | string | Yes | Your RSA Private Key (PEM format) |
orderId | string | Yes | Order ID to retrieve (e.g., "abc123-def456-ghi789") |
| Parameter | Type | Description |
|---|
order | object | Order object with full API response fields |
↳ order_id | string | Order ID |
↳ user_id | string | User ID |
↳ client_order_id | string | Client order ID |
↳ ticker | string | Market ticker |
↳ side | string | Order side (yes/no) |
↳ action | string | Action (buy/sell) |
↳ type | string | Order type (limit/market) |
↳ status | string | Order status (resting/canceled/executed) |
↳ yes_price | number | Yes price in cents |
↳ no_price | number | No price in cents |
↳ yes_price_dollars | string | Yes price in dollars |
↳ no_price_dollars | string | No price in dollars |
↳ fill_count | number | Filled contract count |
↳ fill_count_fp | string | Filled count (fixed-point) |
↳ remaining_count | number | Remaining contracts |
↳ remaining_count_fp | string | Remaining count (fixed-point) |
↳ initial_count | number | Initial contract count |
↳ initial_count_fp | string | Initial count (fixed-point) |
↳ taker_fees | number | Taker fees in cents |
↳ maker_fees | number | Maker fees in cents |
↳ taker_fees_dollars | string | Taker fees in dollars |
↳ maker_fees_dollars | string | Maker fees in dollars |
↳ taker_fill_cost | number | Taker fill cost in cents |
↳ maker_fill_cost | number | Maker fill cost in cents |
↳ taker_fill_cost_dollars | string | Taker fill cost in dollars |
↳ maker_fill_cost_dollars | string | Maker fill cost in dollars |
↳ queue_position | number | Queue position (deprecated) |
↳ expiration_time | string | Order expiration time |
↳ created_time | string | Order creation time |
↳ last_update_time | string | Last update time |
↳ self_trade_prevention_type | string | Self-trade prevention type |
↳ order_group_id | string | Order group ID |
↳ cancel_order_on_pause | boolean | Cancel on market pause |
Retrieve the orderbook (yes and no bids) for a specific market (V2 - includes depth and fp fields)
| Parameter | Type | Required | Description |
|---|
ticker | string | Yes | Market ticker identifier (e.g., "KXBTC-24DEC31", "INX-25JAN03-T4485.99") |
depth | number | No | Number of price levels to return (e.g., 10, 20). Default: all levels |
| Parameter | Type | Description |
|---|
orderbook | object | Orderbook with yes/no bids (legacy integer counts) |
↳ yes | array | Yes side bids as tuples [price_cents, count] |
↳ no | array | No side bids as tuples [price_cents, count] |
↳ yes_dollars | array | Yes side bids as tuples [dollars_string, count] |
↳ no_dollars | array | No side bids as tuples [dollars_string, count] |
orderbook_fp | object | Orderbook with fixed-point counts (preferred) |
↳ yes_dollars | array | Yes side bids as tuples [dollars_string, fp_count_string] |
↳ no_dollars | array | No side bids as tuples [dollars_string, fp_count_string] |
Retrieve recent trades with additional filtering options (V2 - includes trade_id and count_fp)
| Parameter | Type | Required | Description |
|---|
ticker | string | No | Filter by market ticker (e.g., "KXBTC-24DEC31") |
minTs | number | No | Minimum timestamp in Unix seconds (e.g., 1704067200) |
maxTs | number | No | Maximum timestamp in Unix seconds (e.g., 1704153600) |
limit | string | No | Number of results to return (1-1000, default: 100) |
cursor | string | No | Pagination cursor from previous response for fetching next page |
| Parameter | Type | Description |
|---|
trades | array | Array of trade objects with trade_id and count_fp |
↳ ticker | string | Market ticker |
↳ yes_price | number | Trade price for yes in cents |
↳ no_price | number | Trade price for no in cents |
↳ count | number | Number of contracts traded |
↳ taker_side | string | Taker side (yes/no) |
↳ created_time | string | Trade time (ISO 8601) |
cursor | string | Pagination cursor for fetching more results |
Retrieve OHLC candlestick data for a specific market (V2 - full API response)
| Parameter | Type | Required | Description |
|---|
seriesTicker | string | Yes | Series ticker identifier (e.g., "KXBTC", "INX", "FED-RATE") |
ticker | string | Yes | Market ticker identifier (e.g., "KXBTC-24DEC31", "INX-25JAN03-T4485.99") |
startTs | number | Yes | Start timestamp in Unix seconds (e.g., 1704067200) |
endTs | number | Yes | End timestamp in Unix seconds (e.g., 1704153600) |
periodInterval | number | Yes | Period interval: 1 (1 minute), 60 (1 hour), or 1440 (1 day) |
| Parameter | Type | Description |
|---|
ticker | string | Market ticker |
candlesticks | array | Array of OHLC candlestick data with nested bid/ask/price objects |
Retrieve OHLC candlestick data aggregated across all markets in an event (V2 - full API response)
| Parameter | Type | Required | Description |
|---|
seriesTicker | string | Yes | Series ticker identifier (e.g., "KXBTC", "INX", "FED-RATE") |
eventTicker | string | Yes | Event ticker identifier (e.g., "KXBTC-24DEC31", "INX-25JAN03") |
startTs | number | Yes | Start timestamp in Unix seconds (e.g., 1704067200) |
endTs | number | Yes | End timestamp in Unix seconds (e.g., 1704153600) |
periodInterval | number | Yes | Period interval: 1 (1 minute), 60 (1 hour), or 1440 (1 day) |
| Parameter | Type | Description |
|---|
market_tickers | array | Market tickers included in the aggregated candlesticks |
adjusted_end_ts | number | Adjusted end timestamp used for the candlestick range (Unix seconds) |
market_candlesticks | array | Array of event-level aggregated OHLC candlestick data with nested bid/ask/price |
Retrieve your portfolio's fills/trades from Kalshi (V2 - exact API response)
| Parameter | Type | Required | Description |
|---|
keyId | string | Yes | Your Kalshi API Key ID |
privateKey | string | Yes | Your RSA Private Key (PEM format) |
ticker | string | No | Filter by market ticker (e.g., "KXBTC-24DEC31") |
orderId | string | No | Filter by order ID (e.g., "abc123-def456-ghi789") |
minTs | number | No | Minimum timestamp in Unix milliseconds (e.g., 1704067200000) |
maxTs | number | No | Maximum timestamp in Unix milliseconds (e.g., 1704153600000) |
subaccount | string | No | Subaccount identifier to get fills for |
limit | string | No | Number of results to return (1-200, default: 100) |
cursor | string | No | Pagination cursor from previous response for fetching next page |
| Parameter | Type | Description |
|---|
fills | array | Array of fill/trade objects with all API fields |
↳ trade_id | string | Unique trade identifier |
↳ order_id | string | Associated order ID |
↳ ticker | string | Market ticker |
↳ side | string | Trade side (yes/no) |
↳ action | string | Trade action (buy/sell) |
↳ count | number | Number of contracts |
↳ yes_price | number | Yes price in cents |
↳ no_price | number | No price in cents |
↳ is_taker | boolean | Whether this was a taker trade |
↳ created_time | string | Trade execution time (ISO 8601) |
cursor | string | Pagination cursor for fetching more results |
Retrieve your portfolio settlement history from Kalshi (V2 - exact API response)
| Parameter | Type | Required | Description |
|---|
keyId | string | Yes | Your Kalshi API Key ID |
privateKey | string | Yes | Your RSA Private Key (PEM format) |
ticker | string | No | Filter by market ticker (e.g., "KXBTC-24DEC31") |
eventTicker | string | No | Filter by event ticker (e.g., "KXBTC-24DEC31") |
minTs | number | No | Minimum settled timestamp in Unix seconds (e.g., 1704067200) |
maxTs | number | No | Maximum settled timestamp in Unix seconds (e.g., 1704153600) |
subaccount | string | No | Subaccount number (0 for primary, 1-63 for subaccounts) |
limit | string | No | Number of results to return (1-1000, default: 100) |
cursor | string | No | Pagination cursor from previous response for fetching next page |
| Parameter | Type | Description |
|---|
settlements | array | Array of settlement objects with all API fields |
↳ ticker | string | Market ticker |
↳ event_ticker | string | Event ticker |
↳ market_result | string | Settlement outcome (yes, no, scalar) |
↳ yes_count_fp | string | Yes contracts owned (fixed-point) |
↳ yes_total_cost_dollars | string | Yes cost basis in dollars |
↳ no_count_fp | string | No contracts owned (fixed-point) |
↳ no_total_cost_dollars | string | No cost basis in dollars |
↳ revenue | number | Payout in cents |
↳ settled_time | string | Settlement timestamp (ISO 8601) |
↳ fee_cost | string | Fees in fixed-point dollars |
↳ value | number | Single yes contract payout in cents |
cursor | string | Pagination cursor for fetching more results |
Retrieve details of a specific market series by ticker (V2 - exact API response)
| Parameter | Type | Required | Description |
|---|
seriesTicker | string | Yes | Series ticker identifier (e.g., "KXBTC", "INX", "FED-RATE") |
includeVolume | string | No | Include volume data in response (true/false) |
| Parameter | Type | Description |
|---|
series | object | Series object with full details matching Kalshi API response |
↳ ticker | string | Series ticker |
↳ title | string | Series title |
↳ frequency | string | Event frequency |
↳ category | string | Series category |
↳ tags | array | Series tags |
↳ settlement_sources | array | Settlement sources |
↳ contract_url | string | Contract URL |
↳ contract_terms_url | string | Contract terms URL |
↳ fee_type | string | Fee type |
↳ fee_multiplier | number | Fee multiplier |
↳ additional_prohibitions | array | Additional prohibitions |
↳ product_metadata | object | Product metadata |
↳ volume | number | Series volume |
↳ volume_fp | number | Volume (fixed-point) |
Retrieve a list of market series from Kalshi with optional filtering (V2 - exact API response)
| Parameter | Type | Required | Description |
|---|
category | string | No | Filter by category (e.g., "Economics", "Politics", "Crypto") |
tags | string | No | Filter by comma-separated tags |
includeProductMetadata | string | No | Include product metadata in response (true/false) |
includeVolume | string | No | Include volume data in response (true/false) |
minUpdatedTs | number | No | Minimum updated timestamp in Unix seconds (e.g., 1704067200) |
| Parameter | Type | Description |
|---|
series | array | Array of series objects with all API fields |
↳ ticker | string | Unique series ticker |
↳ title | string | Series title |
↳ frequency | string | Event frequency (daily, weekly, etc.) |
↳ category | string | Series category |
↳ tags | array | Series tags |
↳ contract_url | string | Contract rules URL |
Retrieve the current status of the Kalshi exchange (V2 - exact API response)
| Parameter | Type | Required | Description |
|---|
| Parameter | Type | Description |
|---|
exchange_active | boolean | Whether the exchange is active |
trading_active | boolean | Whether trading is active |
exchange_estimated_resume_time | string | Estimated time when exchange will resume (if inactive) |
Retrieve the Kalshi exchange trading schedule and maintenance windows (V2 - exact API response)
| Parameter | Type | Required | Description |
|---|
| Parameter | Type | Description |
|---|
schedule | object | Exchange schedule (all times in ET) |
↳ standard_hours | array | Weekly schedules with per-day open/close trading sessions |
↳ maintenance_windows | array | Scheduled maintenance windows with start_datetime and end_datetime |
Retrieve exchange-wide announcements from Kalshi (V2 - exact API response)
| Parameter | Type | Required | Description |
|---|
| Parameter | Type | Description |
|---|
announcements | array | Array of exchange announcement objects |
↳ type | string | Announcement severity (info, warning, error) |
↳ message | string | Announcement message |
↳ delivery_time | string | Delivery time (ISO 8601) |
↳ status | string | Announcement status (active, inactive) |
Create a new order on a Kalshi prediction market (V2 with full API response)
| Parameter | Type | Required | Description |
|---|
keyId | string | Yes | Your Kalshi API Key ID |
privateKey | string | Yes | Your RSA Private Key (PEM format) |
ticker | string | Yes | Market ticker identifier (e.g., "KXBTC-24DEC31", "INX-25JAN03-T4485.99") |
side | string | Yes | Side of the order: "yes" or "no" |
action | string | Yes | Action type: "buy" or "sell" |
count | string | No | Number of contracts to trade (e.g., "10", "100"). Provide count or countFp |
type | string | No | Order type: "limit" or "market" (default: "limit") |
yesPrice | string | No | Yes price in cents (1-99) |
noPrice | string | No | No price in cents (1-99) |
yesPriceDollars | string | No | Yes price in dollars (e.g., "0.56") |
noPriceDollars | string | No | No price in dollars (e.g., "0.56") |
clientOrderId | string | No | Custom order identifier |
expirationTs | string | No | Unix timestamp for order expiration |
timeInForce | string | No | Time in force: 'fill_or_kill', 'good_till_canceled', 'immediate_or_cancel' |
buyMaxCost | string | No | Maximum cost in cents (auto-enables fill_or_kill) |
postOnly | string | No | Set to 'true' for maker-only orders |
reduceOnly | string | No | Set to 'true' for position reduction only |
selfTradePreventionType | string | No | Self-trade prevention: 'taker_at_cross' or 'maker' |
orderGroupId | string | No | Associated order group ID |
countFp | string | No | Count in fixed-point for fractional contracts |
cancelOrderOnPause | string | No | Set to 'true' to cancel order on market pause |
subaccount | string | No | Subaccount to use for the order |
| Parameter | Type | Description |
|---|
order | object | The created order object with full API response fields |
↳ order_id | string | Order ID |
↳ user_id | string | User ID |
↳ client_order_id | string | Client order ID |
↳ ticker | string | Market ticker |
↳ side | string | Order side (yes/no) |
↳ action | string | Action (buy/sell) |
↳ type | string | Order type (limit/market) |
↳ status | string | Order status (resting/canceled/executed) |
↳ yes_price | number | Yes price in cents |
↳ no_price | number | No price in cents |
↳ yes_price_dollars | string | Yes price in dollars |
↳ no_price_dollars | string | No price in dollars |
↳ fill_count | number | Filled contract count |
↳ fill_count_fp | string | Filled count (fixed-point) |
↳ remaining_count | number | Remaining contracts |
↳ remaining_count_fp | string | Remaining count (fixed-point) |
↳ initial_count | number | Initial contract count |
↳ initial_count_fp | string | Initial count (fixed-point) |
↳ taker_fees | number | Taker fees in cents |
↳ maker_fees | number | Maker fees in cents |
↳ taker_fees_dollars | string | Taker fees in dollars |
↳ maker_fees_dollars | string | Maker fees in dollars |
↳ taker_fill_cost | number | Taker fill cost in cents |
↳ maker_fill_cost | number | Maker fill cost in cents |
↳ taker_fill_cost_dollars | string | Taker fill cost in dollars |
↳ maker_fill_cost_dollars | string | Maker fill cost in dollars |
↳ queue_position | number | Queue position (deprecated) |
↳ expiration_time | string | Order expiration time |
↳ created_time | string | Order creation time |
↳ last_update_time | string | Last update time |
↳ self_trade_prevention_type | string | Self-trade prevention type |
↳ order_group_id | string | Order group ID |
↳ cancel_order_on_pause | boolean | Cancel on market pause |
Cancel an existing order on Kalshi (V2 with full API response)
| Parameter | Type | Required | Description |
|---|
keyId | string | Yes | Your Kalshi API Key ID |
privateKey | string | Yes | Your RSA Private Key (PEM format) |
orderId | string | Yes | Order ID to cancel (e.g., "abc123-def456-ghi789") |
| Parameter | Type | Description |
|---|
order | object | The canceled order object with full API response fields |
↳ order_id | string | Order ID |
↳ user_id | string | User ID |
↳ client_order_id | string | Client order ID |
↳ ticker | string | Market ticker |
↳ side | string | Order side (yes/no) |
↳ action | string | Action (buy/sell) |
↳ type | string | Order type (limit/market) |
↳ status | string | Order status (resting/canceled/executed) |
↳ yes_price | number | Yes price in cents |
↳ no_price | number | No price in cents |
↳ yes_price_dollars | string | Yes price in dollars |
↳ no_price_dollars | string | No price in dollars |
↳ fill_count | number | Filled contract count |
↳ fill_count_fp | string | Filled count (fixed-point) |
↳ remaining_count | number | Remaining contracts |
↳ remaining_count_fp | string | Remaining count (fixed-point) |
↳ initial_count | number | Initial contract count |
↳ initial_count_fp | string | Initial count (fixed-point) |
↳ taker_fees | number | Taker fees in cents |
↳ maker_fees | number | Maker fees in cents |
↳ taker_fees_dollars | string | Taker fees in dollars |
↳ maker_fees_dollars | string | Maker fees in dollars |
↳ taker_fill_cost | number | Taker fill cost in cents |
↳ maker_fill_cost | number | Maker fill cost in cents |
↳ taker_fill_cost_dollars | string | Taker fill cost in dollars |
↳ maker_fill_cost_dollars | string | Maker fill cost in dollars |
↳ queue_position | number | Queue position (deprecated) |
↳ expiration_time | string | Order expiration time |
↳ created_time | string | Order creation time |
↳ last_update_time | string | Last update time |
↳ self_trade_prevention_type | string | Self-trade prevention type |
↳ order_group_id | string | Order group ID |
↳ cancel_order_on_pause | boolean | Cancel on market pause |
reduced_by | number | Number of contracts canceled |
reduced_by_fp | string | Number of contracts canceled in fixed-point format |
Modify the price or quantity of an existing order on Kalshi (V2 with full API response)
| Parameter | Type | Required | Description |
|---|
keyId | string | Yes | Your Kalshi API Key ID |
privateKey | string | Yes | Your RSA Private Key (PEM format) |
orderId | string | Yes | Order ID to amend (e.g., "abc123-def456-ghi789") |
ticker | string | Yes | Market ticker identifier (e.g., "KXBTC-24DEC31", "INX-25JAN03-T4485.99") |
side | string | Yes | Side of the order: "yes" or "no" |
action | string | Yes | Action type: "buy" or "sell" |
clientOrderId | string | No | Original client-specified order ID |
updatedClientOrderId | string | No | New client-specified order ID after amendment |
count | string | No | Updated quantity for the order (e.g., "10", "100") |
yesPrice | string | No | Updated yes price in cents (1-99) |
noPrice | string | No | Updated no price in cents (1-99) |
yesPriceDollars | string | No | Updated yes price in dollars (e.g., "0.56") |
noPriceDollars | string | No | Updated no price in dollars (e.g., "0.56") |
countFp | string | No | Count in fixed-point for fractional contracts |
| Parameter | Type | Description |
|---|
old_order | object | The original order object before amendment |
↳ order_id | string | Order ID |
↳ user_id | string | User ID |
↳ ticker | string | Market ticker |
↳ event_ticker | string | Event ticker |
↳ status | string | Order status |
↳ side | string | Order side (yes/no) |
↳ type | string | Order type (limit/market) |
↳ yes_price | number | Yes price in cents |
↳ no_price | number | No price in cents |
↳ action | string | Action (buy/sell) |
↳ count | number | Number of contracts |
↳ remaining_count | number | Remaining contracts |
↳ created_time | string | Order creation time |
↳ expiration_time | string | Order expiration time |
↳ order_group_id | string | Order group ID |
↳ client_order_id | string | Client order ID |
↳ place_count | number | Place count |
↳ decrease_count | number | Decrease count |
↳ queue_position | number | Queue position |
↳ maker_fill_count | number | Maker fill count |
↳ taker_fill_count | number | Taker fill count |
↳ maker_fees | number | Maker fees |
↳ taker_fees | number | Taker fees |
↳ last_update_time | string | Last update time |
↳ take_profit_order_id | string | Take profit order ID |
↳ stop_loss_order_id | string | Stop loss order ID |
↳ amend_count | number | Amend count |
↳ amend_taker_fill_count | number | Amend taker fill count |
order | object | The amended order object with full API response fields |
↳ order_id | string | Order ID |
↳ user_id | string | User ID |
↳ ticker | string | Market ticker |
↳ event_ticker | string | Event ticker |
↳ status | string | Order status |
↳ side | string | Order side (yes/no) |
↳ type | string | Order type (limit/market) |
↳ yes_price | number | Yes price in cents |
↳ no_price | number | No price in cents |
↳ action | string | Action (buy/sell) |
↳ count | number | Number of contracts |
↳ remaining_count | number | Remaining contracts |
↳ created_time | string | Order creation time |
↳ expiration_time | string | Order expiration time |
↳ order_group_id | string | Order group ID |
↳ client_order_id | string | Client order ID |
↳ place_count | number | Place count |
↳ decrease_count | number | Decrease count |
↳ queue_position | number | Queue position |
↳ maker_fill_count | number | Maker fill count |
↳ taker_fill_count | number | Taker fill count |
↳ maker_fees | number | Maker fees |
↳ taker_fees | number | Taker fees |
↳ last_update_time | string | Last update time |
↳ take_profit_order_id | string | Take profit order ID |
↳ stop_loss_order_id | string | Stop loss order ID |
↳ amend_count | number | Amend count |
↳ amend_taker_fill_count | number | Amend taker fill count |
