Kalshi communications API
Request-for-quote (RFQ) endpoints
Kalshi communications API is one of 21 APIs that Kalshi publishes on the APIs.io network, described by a machine-readable OpenAPI specification.
Tagged areas include communications. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.
This API exposes 11 operations across 7 paths, and defines 18 schemas. It is described by OpenAPI 3.0.0, 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.
Metadata
The identity and technical contract details declared by the specification.
Authentication & Security 3
Kalshi communications 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 IDkalshiAccessSignature— RSA-PSS signature of the requestkalshiAccessTimestamp— Request timestamp in milliseconds
Paths & Operations 11
Across 7 paths, the API surfaces 11 operations — 2 DELETE, 5 GET, 2 POST, 2 PUT. Each is listed below with its method, path, parameters, and response codes.
Request-for-quote (RFQ) endpoints
Schemas 18
The contract defines 18 schemas that model the data the API accepts and returns. The most detailed are Quote (28 properties), RFQ (15 properties), CreateRFQRequest (9 properties), CreateQuoteRequest (6 properties). Each schema is shown below with its type and property counts.
Specification
The full machine-readable OpenAPI contract behind this narrative.
Source
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Other APIs Kalshi publishes across the network.