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API Documentation

For agents: Kalshi API documentation with OpenAPI and AsyncAPI specs, REST and WebSocket endpoints, demo environment, and authenticated request quick start.

kalshi apirest apiwebsocketprediction marketsopenapiauthentication

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-23T00:47:06.161Z. Cached copy · Source on kalshi.com

# API Documentation

- [Introduction](https://docs.kalshi.com/welcome/index.md): Welcome to the Kalshi API documentation
- [API Environments and Endpoints](https://docs.kalshi.com/getting_started/api_environments.md): REST and WebSocket base URLs for production and demo
- [Quick Start: Market Data](https://docs.kalshi.com/getting_started/quick_start_market_data.md): Learn how to access real-time market data without authentication
- [Quick Start: Authenticated Requests](https://docs.kalshi.com/getting_started/quick_start_authenticated_requests.md): Three simple steps to make your first authenticated API request to Kalshi
- [Quick Start: Create your first order](https://docs.kalshi.com/getting_started/quick_start_create_order.md): Learn how to find markets, place orders, check status, and cancel orders on Kalshi
- [Quick Start: WebSockets](https://docs.kalshi.com/getting_started/quick_start_websockets.md): Learn how to establish and maintain a WebSocket connection to stream real-time market data
- [Kalshi SDKs](https://docs.kalshi.com/sdks/overview.md): Official Python and TypeScript SDKs for the Kalshi API
- [Making Your First Request](https://docs.kalshi.com/getting_started/making_your_first_request.md): Start trading with Kalshi API in under 5 minutes
- [Test In The Demo Environment](https://docs.kalshi.com/getting_started/demo_env.md): Set up and test with Kalshi's demo environment
- [API Keys](https://docs.kalshi.com/getting_started/api_keys.md): API Key usage
- [Rate Limits and Tiers](https://docs.kalshi.com/getting_started/rate_limits.md): Token costs, tier budgets, and burst capacity for the Kalshi API
- [Understanding Pagination](https://docs.kalshi.com/getting_started/pagination.md): Learn how to navigate through large datasets using cursor-based pagination
- [Orderbook Responses](https://docs.kalshi.com/getting_started/orderbook_responses.md): Understanding Kalshi orderbook structure and binary prediction market mechanics
- [Order direction (outcome_side and book_side)](https://docs.kalshi.com/getting_started/order_direction.md): How direction is expressed on Order, Fill, and Trade responses, and how to migrate from the legacy action/side fields.
- [Order Groups](https://docs.kalshi.com/getting_started/order_groups.md): Automatic order cancellation based on rolling contract limits
- [Subaccounts](https://docs.kalshi.com/getting_started/subaccounts.md): Isolate balances and positions within a single Direct account
- [Sub-users vs. Subaccounts](https://docs.kalshi.com/getting_started/sub_users_vs_subaccounts.md): Sub-users add people to an account; subaccounts split its funds
- [Fixed-Point Representation](https://docs.kalshi.com/getting_started/fixed_point_migration.md): Fixed-point prices, price level structures, and fractional contract quantities.
- [Fee Rounding](https://docs.kalshi.com/getting_started/fee_rounding.md): How trade fees and balances are rounded.
- [Historical Data](https://docs.kalshi.com/getting_started/historical_data.
…

Related sites

Other listed sites in APIs and SDKs. See the whole category →

Machine-readable: GET /v1/resolve?q=kalshi.com · GET /v1/domain/kalshi.com · this page as Accept: application/json or text/markdown · MCP lookup_domain

Automatically discovered from public files. Inclusion does not imply endorsement or publisher participation.

Claim my listing on Agent Web Map for kalshi.com:
1. POST https://agentwebmap.com/v1/sites/kalshi.com/claims and keep claim_id and claim_secret private.
2. Publish the proof: add the line "AgentWebMap ownership: <token>" (token from step 1) to https://kalshi.com/llms.txt, or use the DNS, meta-tag or well-known method the response describes.
3. POST https://agentwebmap.com/v1/sites/kalshi.com/verify with {"claim_id": "...", "claim_secret": "..."}.
4. Save the api_key from the answer; it manages the listing (PATCH https://agentwebmap.com/v1/sites/kalshi.com).
MCP equivalent: tools begin_ownership_claim, then verify_domain, at https://agentwebmap.com/mcp. Docs: https://agentwebmap.com/docs#verify

Corrections or removal requests: contact the directory.