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Documentation Index

Fetch the complete documentation index at: https://docs.kalshi.com/llms.txt

Use this file to discover all available pages before exploring further.

Welcome to Kalshi’s API Documentation

This documentation covers the Kalshi Exchange API for real-time market data and trade execution

By continuing to use or access Kalshi’s API, you are agreeing to be bound to our Developer Agreement

The APIs

Predictions APIs

Event-contract markets — REST, WebSocket, and FIX.

Perps APIs

Perpetual futures (margin) — REST, WebSocket, and FIX.

Get started

Making Your First Request

Make your first API call and start trading on Kalshi.

Demo Environment

Build and test safely against the demo environment.

API Keys

Generate and manage your API credentials.

Reference

Rate Limits

Token budgets, tiers, and bursting.

Changelog

Stay updated with the latest API changes.

Glossary

Key terms and concepts used across the exchange.

Specifications

Download the raw spec files for code generation or building your own client:New to prediction markets? Visit Kalshi Academy.