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Kalshi WebSocket Streaming API

Real-time streaming feed for market data, order book updates, fills, and portfolio events on Kalshi. Documented as an AsyncAPI spec alongside the OpenAPI REST surface.

Kalshi WebSocket Streaming API is one of 21 APIs that Kalshi publishes on the APIs.io network, described by an AsyncAPI event-driven specification.

Tagged areas include WebSocket, Streaming, and Market Data. The published artifact set on APIs.io includes API documentation and an AsyncAPI specification.

Requests are made against the base URL wss://api.elections.kalshi.com/trade-api/ws/v2.

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI
Base URL
wss://api.elections.kalshi.com/trade-api/ws/v2

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

asyncapi.yaml Raw ↑

Other APIs Kalshi publishes across the network.

Kalshi Trade API (Demo)
Kalshi AsyncAPI Specification
Kalshi Python Starter Kit
Kalshi account API
Kalshi api-keys API
Kalshi communications API
Kalshi events API
Kalshi exchange API
Kalshi fcm API
Kalshi historical API
Kalshi incentive-programs API
Kalshi live-data API