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Kalshi

Kalshi milestone API

Milestone endpoints

Documentation Provider Profile APIs.io OpenAPI GitHub

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

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

This API exposes 2 operations across 2 paths, and defines 3 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.

2 operations 2 paths 3 schemas 2 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 milestone 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 2

Across 2 paths, the API surfaces 2 operations — 2 GET. Each is listed below with its method, path, parameters, and response codes.

milestone 2

Milestone endpoints

GET
/milestones/{milestone_id}
Get Milestone
GetMilestone 1 param → 200400401404500
GET
/milestones
Get Milestones
GetMilestones 9 params → 200400401500

Schemas 3

The contract defines 3 schemas that model the data the API accepts and returns. The most detailed are Milestone (13 properties), GetMilestonesResponse (2 properties), GetMilestoneResponse (1 property). Each schema is shown below with its type and property counts.

Milestone
object
13 properties 10 required
GetMilestoneResponse
object
1 property 1 required
GetMilestonesResponse
object
2 properties 1 required

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

kalshi-milestone-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 exchange 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
#Milestone
← Back to K APIs
API Details
ID
kalshi:kalshi-milestone-api
Base URL
https://api.elections.kalshi.com/trade-api/v2
Docs
https://docs.kalshi.com/api-reference
Provider
Kalshi
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