Kalshi Odds API

Access Kalshi betting odds through the SockOdds API. Structured JSON data including head to head, lines, totals, player props and more — bookmakerID=kalshi.

Why choose our Kalshi exchange API?

Our Kalshi API provides clean, structured Kalshi odds data for developers and betting platforms, eliminating the need for scraping or unstable data feeds. US-regulated prediction market; sports contracts priced alongside the books.

Kalshi Odds API Overview

The SockOdds Kalshi odds API provides fast, accurate data and odds from Kalshi across 10 leagues: NFL, MLS, MLB, La Liga, Premier League, Serie A, Bundesliga, Ligue 1, ATP, WTA. 253 events are priced by Kalshi right now.

With a single, unified API solution, developers can retrieve pre-match Kalshi odds, including:

• Head to head / moneylines (2-way and 3-way markets)
• Lines, spreads and handicaps
• Totals (over/under)
• Alternative lines
• Player props and game props
• Period-specific markets (quarters, halves, innings, sets, rounds)

All data is provided in structured JSON via REST endpoints, refreshed every ~2 minutes.

Kalshi API Features & Market Types

Main markets

• Head to head — 2-way and 3-way lines
• Line / handicap — spreads with the price
• Totals — over/under lines for points, goals, runs and more
• Period markets — halves, quarters, innings, sets, rounds where priced

Player props & alternate lines

Kalshi prices at match and team level in the feed today; alternate lines and team props where offered.

Pre-match data

• Pre-game odds — current odds before game time, with decimal alongside the American string
• Availability — a suspended selection is listed with available: false, never dropped silently
• Line movement tracking — every price carries lastUpdatedAt, and finished events are retained

Deeplinks & settlement data

• Deeplinks — not yet carried for Kalshi
• Results — event results and scoringSupported flags where the source grades the market

Kalshi coverage by league

Kalshi Odds API Technical Specifications

API Architecture

• REST API — Simple HTTP endpoints with JSON responses, identical to the SportsGameOdds v2 paths
• Polling, not push — the feed refreshes every ~2 minutes; /v2/stream/events is reserved and answers 501 rather than pretending
• Rate limits — per-key, per-minute meters that bind under concurrency; plans sized to your usage
• Authentication — secure API key access via the x-api-key header or apiKey query parameter

Data Update Speed

• Odds updates — every ~2 minutes across every bookmaker lane
• Event status — status flags and info.stale tell you exactly how current a price is

Developer Resources

• Interactive documentation — live examples, copy-paste snippets and an AI (vibe coding) context
• SDKs & libraries — the SportsGameOdds SDKs for TypeScript, Python, Ruby, Go and Java work unchanged with the base URL pointed here
• Postman collection — pre-built requests ready to run
• Support — email support on every plan, priority on paid plans

Kalshi market coverage by category

Use Cases for Kalshi API Data

• Arbitrage & +EV tools — compare Kalshi odds across every Australian bookmaker to uncover arbitrage opportunities and positive expected value angles.
• Odds comparison platforms — display Kalshi odds from every book side by side for comprehensive line shopping.
• Pricing models & trading — use Kalshi market data as inputs for proprietary pricing algorithms and betting strategies.
• Sports analytics & research — examine Kalshi line movements and betting-market patterns, and build predictive models on retained events.
• Betting automation — build systems that monitor Kalshi lines across bookmakers and trigger actions when your target odds appear.
• Sportsbook & fantasy apps — power your Kalshi product with reliable odds, status and bet-slip deeplinks.

Kalshi Odds API Documentation

Our interactive documentation covers everything you need to integrate Kalshi odds into your project:

• Full endpoint reference with parameters and response schemas
• Live request and response examples
• Code snippets in Python, JavaScript, Ruby, Go and Java
• Authentication setup and API key management
• Rate limiting and the notice field
• Error handling and troubleshooting

View documentation