{
"count": 5,
"items": [
{
"venue": "polymarket",
"marketId": "665374",
"eventId": "73130",
"eventTitle": "Will the U.S. invade Iran before 2027?",
"question": "Will the U.S. invade Iran before 2027?",
"outcomes": [
"Yes",
"No"
],
"yesPrice": 0.075,
"noPrice": 0.925,
"volume": 79865019.0853,
"volume24h": 235945.3295,
"liquidity": 318190.7688,
"openInterest": null,
"closeTime": "2027-01-01T04:59:00Z",
"status": "open",
"category": "Military Strikes",
"url": "https://polymarket.com/event/will-the-us-invade-iran-before-2027",
"impliedProbabilityPct": 7.5,
"fetchedAt": "2026-11-12T06:22:37Z"
},
{
"venue": "polymarket",
"marketId": "561251",
"eventId": "31552",
"eventTitle": "Presidential Election Winner 2028",
"question": "Will LeBron James win the 2028 US Presidential Election?",
"outcomes": [
"Yes",
"No"
],
"yesPrice": 0.0005,
"noPrice": 0.9995,
"volume": 55187134.9687,
"volume24h": 366.44,
"liquidity": 2177922.8367,
"openInterest": null,
"closeTime": "2028-11-08T04:59:00Z",
"status": "open",
"category": "President",
"url": "https://polymarket.com/event/presidential-election-winner-2028",
"impliedProbabilityPct": 0.05,
"fetchedAt": "2026-11-12T06:22:37Z"
},
{
"venue": "polymarket",
"marketId": "559687",
"eventId": "30829",
"eventTitle": "Democratic Presidential Nominee 2028",
"question": "Will Oprah Winfrey win the 2028 Democratic presidential nomination?",
"outcomes": [
"Yes",
"No"
],
"yesPrice": 0.0005,
"noPrice": 0.9995,
"volume": 54667909.1858,
"volume24h": 312,
"liquidity": 2736274.107,
"openInterest": null,
"closeTime": "2028-11-08T04:59:00Z",
"status": "open",
"category": "United States",
"url": "https://polymarket.com/event/democratic-presidential-nominee-2028",
"impliedProbabilityPct": 0.05,
"fetchedAt": "2026-11-12T06:22:37Z"
},
{
"venue": "polymarket",
"marketId": "559679",
"eventId": "30829",
"eventTitle": "Democratic Presidential Nominee 2028",
"question": "Will Bernie Sanders win the 2028 Democratic presidential nomination?",
"outcomes": [
"Yes",
"No"
],
"yesPrice": 0.0025,
"noPrice": 0.9975,
"volume": 52983452.2956,
"volume24h": 4410.063,
"liquidity": 224784.2866,
"openInterest": null,
"closeTime": "2028-11-08T04:59:00Z",
"status": "open",
"category": "United States",
"url": "https://polymarket.com/event/democratic-presidential-nominee-2028",
"matchedVenue": "kalshi",
"matchedMarketId": "KXPRESNOMD-28-BS",
"matchedQuestion": "Will Bernie Sanders be the Democratic Presidential nominee in 2028?",
"matchedYesPrice": 0.005,
"matchedUrl": "https://kalshi.com/markets/kxpresnomd-28",
"matchScore": 0.857,
"priceGapPts": 0.25,
"impliedProbabilityPct": 0.25,
"fetchedAt": "2026-11-12T06:22:37Z"
},
{
"venue": "polymarket",
"marketId": "559684",
"eventId": "30829",
"eventTitle": "Democratic Presidential Nominee 2028",
"question": "Will Chelsea Clinton win the 2028 Democratic presidential nomination?",
"outcomes": [
"Yes",
"No"
],
"yesPrice": 0.0075,
"noPrice": 0.9925,
"volume": 51133396.1102,
"volume24h": 257.4,
"liquidity": 177824.5623,
"openInterest": null,
"closeTime": "2028-11-08T04:59:00Z",
"status": "open",
"category": "United States",
"url": "https://polymarket.com/event/democratic-presidential-nominee-2028",
"impliedProbabilityPct": 0.75,
"fetchedAt": "2026-11-12T06:22:37Z"
}
]
}
curl --location --request GET 'https://zylalabs.com/api/14857/kalshi+markets+api/38673/prediction+markets+api?minVolume=OptionalminPriceMovePts=5&matchAcrossVenues=true&minPriceMovePts=5&maxResults=5&matchAcrossVenues=true&minPriceMovePts=5&minVolume=OptionalmatchAcrossVenues=true&maxResults=5&venues=polymarket,kalshi&maxResults=5&status=open&minVolume=Optionalstatus=open&venues=polymarket,kalshi&status=open&venues=polymarket,kalshi' --header 'Authorization: Bearer YOUR_API_KEY'
After signing up, every developer is assigned a personal API access key, a unique combination of letters and digits provided to access to our API endpoint. To authenticate with the Kalshi Markets API simply include your bearer token in the Authorization header.
| Header | Description |
|---|---|
Authorization
|
Required
Should be Bearer access_key. See "Your API Access Key" above when you are subscribed.
|
No long-term commitment. Upgrade, downgrade, or cancel anytime.
Open Kalshi event contracts with YES and NO prices, volume, open interest and close time, searchable by keyword, as JSON.
Read prediction-market odds from the official public APIs of Polymarket and Kalshi in one flat schema. One row per market: question, YES/NO price, implied probability, volume, 24h volume, liquidity, open interest (Kalshi), close time, status.
Up to 100 results per request. Set it with the maxResults parameter.
Every request collects live data from the public source. Identical requests may be served from a cache for up to 6 hours.
List parameters accept several values separated by commas, for example: london,paris.
The endpoint accepts these query parameters, all optional: query, venues, status, category, minVolume, maxResults, matchAcrossVenues, minPriceMovePts. Query: Words to search for in market and event titles, for example bitcoin, election, fed rates. Leave empty to get the top markets by volume. Venues: Which prediction markets to read. Both are official public APIs without login. Several values: comma separated. Status: Open = markets that can still be traded, closed = finished or settled markets, all = both. Category: Optional. Keep only markets whose category or tag contains this text, for example Politics, Crypto, Economics, Sports. Leave empty for all categories.
The Prediction Markets API returns data on event contracts, including market questions, YES/NO prices, implied probabilities, trading volume, liquidity, open interest, close times, and market status, all structured in a JSON format.
Key fields include eventId, eventTitle, outcomes (Yes/No), yesPrice, noPrice, volume, liquidity, openInterest, closeTime, status, and category, providing comprehensive insights into each market.
The response data is organized in a JSON structure with a "count" of results and an "items" array containing individual market details. Each market entry includes various fields for easy access to specific information.
The API provides information on prediction markets, including event titles, outcomes, pricing, trading volume, liquidity, and market status, covering a wide range of topics like politics, economics, and sports.
Users can customize requests using optional parameters such as query (search terms), venues (specific markets), status (open/closed), category (specific topics), and volume thresholds, allowing tailored data retrieval.
"yesPrice" and "noPrice" indicate the market's current odds for each outcome. "volume" reflects total trading activity, while "openInterest" shows the total number of outstanding contracts. "closeTime" indicates when the market will settle.
Typical use cases include market analysis, trend forecasting, and decision-making in various sectors such as finance, politics, and sports, enabling users to gauge public sentiment and market dynamics.
Data accuracy is maintained by sourcing information directly from the official public APIs of Kalshi and Polymarket, ensuring that users receive reliable and up-to-date market data for their analyses.
To obtain your API key, first sign in to your account and navigate to the API you want to use. From the API's Pricing section, choose a plan and complete the subscription process. Once subscribed, return to the API page and you will see your API Access Key displayed at the top of the documentation page. You can use this key to authenticate your requests.
You can’t switch APIs during the free trial. If you subscribe to a different API, your trial will end and the new subscription will start as a paid plan.
The free trial lasts for 7 days and allows you to make up to 50 API requests.
No, the free trial is available only once, so we recommend using it on the API that interests you the most. Most of our APIs offer a free trial, but some may not include this option.
Yes. If the API offers a free trial, you will see a "Free 7-Day Trial" option in its Pricing section. The trial lasts for 7 days and allows up to 50 API requests, enabling you to evaluate the API before subscribing to a paid plan.
Zyla API Hub is like a big store for APIs, where you can find thousands of them all in one place. We also offer dedicated support and real-time monitoring of all APIs. Once you sign up, you can pick and choose which APIs you want to use. Just remember, each API needs its own subscription. But if you subscribe to multiple ones, you'll use the same key for all of them, making things easier for you.
You can monitor your API usage through the response headers included with every request:
x-zyla-api-calls-monthly-used: Shows the total number of API requests you have used during the current billing period.
x-zyla-api-calls-monthly-remaining: Shows the number of API requests you have remaining for the current billing period.
Yes, you can cancel your subscription at any time. Simply go to the Pricing section of the API you're subscribed to and click the "Unsubscribe" button.
Please note that upgrades, downgrades, and cancellations take effect immediately. Once your subscription is canceled, access to the service will end immediately, regardless of any remaining API calls in your quota.
Please have a look at our Refund Policy: https://zylalabs.com/terms#refund