Compare Kalshi vs Polymarket election odds
Same election questions paired across both venues.
{
"platforms": [
"kalshi",
"polymarket"
],
"mode": "compare",
"query": "election",
"maxMarkets": 100
}Prediction markets
Prediction Markets API: Kalshi and Polymarket odds side by side
Read Kalshi and Polymarket in one schema: implied probability, yes and no price, best bid and ask, 24h move, volume, liquidity and close date for every market. Compare mode pairs the same question across both venues, and history and order-book modes add depth — no API key.
★ 5.0 rating · 1 reviews20 users97.3% successful runs (30 days)
What data you get
platform | Kalshi or Polymarket |
probability | Implied probability of yes |
yesPrice / noPrice | Yes and no prices |
bestBid / bestAsk | Best bid and ask |
move24h | Price change over 24 hours |
volume / liquidity | Traded volume and resting liquidity |
closeDate | When the market closes |
priceHistory | Price points over time |
orderBook | Price levels per side |
How it works
- Open the scraper on Apify and sign up (free).
- Enter routes, dates and options in the form.
- Click Start and download results as JSON, CSV or Excel, or call the API.
Pricing
$1.50 per 1,000 rows
Pay per event: you are charged for each result row returned. There is no separate run or search fee.
Apify gives $5 free credits every month — enough to test this scraper at no cost.
Example tasks
Ready-made inputs. Copy one into the scraper form or send it through the API.
Economics prediction markets on Kalshi and Polymarket
Liquid economics contracts from both venues by 24h volume.
{
"platforms": [
"kalshi",
"polymarket"
],
"mode": "markets",
"category": "Economics",
"minVolume": 1000,
"sortBy": "volume24h",
"maxMarkets": 100
}Most liquid bitcoin markets on Polymarket
Bitcoin markets sorted by liquidity.
{
"platforms": [
"polymarket"
],
"mode": "search",
"query": "bitcoin",
"sortBy": "liquidity",
"maxMarkets": 50
}Two-week price history for a Kalshi market
Price points for one ticker over 14 days.
{
"platforms": [
"kalshi"
],
"mode": "history",
"marketIds": [
"KXOAIANTH-40-OAI"
],
"historyDays": 14
}Use cases
- Arbitrage hunters: spot price gaps on the same question between Kalshi and Polymarket.
- Analysts: track election, economic and sports odds across the whole prediction market.
- Media and research teams: cite crowd-implied probabilities with one consistent dataset.
- Developers: power odds widgets, alerts and AI agents with one API instead of two.
FAQ
Which platforms are covered?
Kalshi and Polymarket. Keep both or pick one with the platforms setting.
What does compare mode do?
It pairs questions that appear on both venues so you can see their prices next to each other.
Do I need an API key or wallet?
No. The actor reads public market data without login, wallet or API key.
Is it legal to scrape Kalshi and Polymarket?
The actor collects publicly visible market data. Make sure your use complies with local law and each platform's terms, and avoid collecting personal data.
How do I get the data into my app?
Use the Apify API, Python or JavaScript clients, or integrations with Make, n8n, Zapier and Google Sheets.