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Kalshi

Kalshi exchange API

Exchange status and information endpoints

Documentation Provider Profile APIs.io OpenAPI GitHub

Kalshi exchange API is one of 21 APIs that Kalshi publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Exchange. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

This API exposes 5 operations across 5 paths, and defines 12 schemas. It is described by OpenAPI 3.2.0, at version 3.19.0.

Requests are made against 4 base URLs: https://external-api.kalshi.com/trade-api/v2, https://api.elections.kalshi.com/trade-api/v2, https://external-api.demo.kalshi.co/trade-api/v2, https://demo-api.kalshi.co/trade-api/v2.

5 operations 5 paths 12 schemas 5 GET

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
3.19.0
Base URL
https://api.elections.kalshi.com/trade-api/v2
Authentication
API Key, API Key, API Key
Resource Areas
1

Authentication & Security 3

Kalshi exchange API declares 3 security schemes for authenticating requests. An API key is passed in the header as KALSHI-ACCESS-KEY (kalshiAccessKey). An API key is passed in the header as KALSHI-ACCESS-SIGNATURE (kalshiAccessSignature). An API key is passed in the header as KALSHI-ACCESS-TIMESTAMP (kalshiAccessTimestamp).

  • kalshiAccessKey — Your API key ID
  • kalshiAccessSignature — RSA-PSS signature of the request
  • kalshiAccessTimestamp — Request timestamp in milliseconds

Paths & Operations 5

Across 5 paths, the API surfaces 5 operations — 5 GET. Each is listed below with its method, path, parameters, and response codes.

exchange 5

Exchange status and information endpoints

GET
/exchange/status
Get Exchange Status
GetExchangeStatus → 200500503504
GET
/exchange/announcements
Get Exchange Announcements
GetExchangeAnnouncements → 200500
GET
/series/fee_changes
Get Series Fee Changes
GetSeriesFeeChanges 2 params → 200400500
GET
/exchange/schedule
Get Exchange Schedule
GetExchangeSchedule → 200500
GET
/exchange/user_data_timestamp
Get User Data Timestamp
GetUserDataTimestamp → 200500

Schemas 12

The contract defines 12 schemas that model the data the API accepts and returns. The most detailed are WeeklySchedule (9 properties), SeriesFeeChange (5 properties), ErrorResponse (4 properties), Announcement (4 properties). Each schema is shown below with its type and property counts.

Schedule
object
2 properties 2 required
GetSeriesFeeChangesResponse
object
1 property 1 required
DailySchedule
object
2 properties 2 required
GetExchangeScheduleResponse
object
1 property 1 required
SeriesFeeChange
object
5 properties 5 required
MaintenanceWindow
object
2 properties 2 required
GetUserDataTimestampResponse
object
1 property 1 required
WeeklySchedule
object
9 properties 9 required
Announcement
object
4 properties 4 required
ErrorResponse
object
4 properties
GetExchangeAnnouncementsResponse
object
1 property 1 required
ExchangeStatus
object
3 properties 2 required

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

kalshi-exchange-api-openapi.yml Raw ↑

Other APIs Kalshi publishes across the network.

Kalshi Trade API (Demo)
AE Profile APIs.io
Kalshi WebSocket Streaming API
AE Profile APIs.io
Kalshi AsyncAPI Specification
AE Profile APIs.io
Kalshi Python Starter Kit
AE Profile APIs.io
Kalshi account API
AE Profile APIs.io
Kalshi api-keys API
AE Profile APIs.io
Kalshi communications API
AE Profile APIs.io
Kalshi events API
AE Profile APIs.io
Kalshi fcm API
AE Profile APIs.io
Kalshi historical API
AE Profile APIs.io
Kalshi incentive-programs API
AE Profile APIs.io
Kalshi live-data API
AE Profile APIs.io
#Exchange
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API Details
ID
kalshi:kalshi-exchange-api
Base URL
https://api.elections.kalshi.com/trade-api/v2
Docs
https://docs.kalshi.com/api-reference
Provider
Kalshi
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