# Compare Polymarket and Kalshi odds for the same event

**Use case:** 

Search open prediction markets on Polymarket and Kalshi and match the same event across both venues to see price differences. Returns probability, volume and links. Change the search query and minimum volume.

## Input

```json
{
  "query": "bitcoin",
  "venues": [
    "polymarket",
    "kalshi"
  ],
  "status": "open",
  "category": "",
  "minVolume": 0,
  "maxResults": 10,
  "matchAcrossVenues": true,
  "minPriceMovePts": 5
}
```

## Output

```json
{
  "venue": {
    "label": "Venue",
    "format": "text"
  },
  "question": {
    "label": "Question",
    "format": "text"
  },
  "yesPrice": {
    "label": "YES price (0-1)",
    "format": "number"
  },
  "impliedProbabilityPct": {
    "label": "Implied probability %",
    "format": "number"
  },
  "volume": {
    "label": "Volume (USD)",
    "format": "number"
  },
  "closeTime": {
    "label": "Close time",
    "format": "date"
  },
  "status": {
    "label": "Status",
    "format": "text"
  },
  "category": {
    "label": "Category",
    "format": "text"
  },
  "priceGapPts": {
    "label": "Price gap (points)",
    "format": "number"
  },
  "matchedVenue": {
    "label": "Matched venue",
    "format": "text"
  },
  "changeType": {
    "label": "Change type (monitor)",
    "format": "text"
  },
  "url": {
    "label": "URL",
    "format": "link"
  }
}
```

## How it works

### 1. Sign up on Apify or log in

The Prediction Markets API - Kalshi & Polymarket Odds, MCP Actor is ready to run with the inputs already set for "Compare Polymarket and Kalshi odds for the same event". [Sign up or log in](https://console.apify.com/create-task-from-example/aQlN7PkUzi0M3tqfW) and you'll land in Apify Console with a copy of this exact task.

### 2. Start the "Compare Polymarket and Kalshi odds for the same event" task

The Prediction Markets API - Kalshi & Polymarket Odds, MCP Actor will start running based on the input automatically. You can also change all the input fields, like search text, venues, and more, to match your specific use case.

### 3. Receive the "Compare Polymarket and Kalshi odds for the same event" output

Monitor the progress in real time. You will be notified as soon as your dataset is complete and ready for review. Each result includes data such as venue, question, YES price (0-1), and more.

### 4. Integrate into your workflow

The final output is delivered in JSON, CSV, or Excel format, ready to be plugged into your workflow. You can also [run the "Compare Polymarket and Kalshi odds for the same event" task via API](https://apify.com/martin10291/prediction-markets-kalshi-polymarket.md).

## FAQ

### What can I change in the input?

Everything shown on this page: query, venues, status, matchAcrossVenues, maxResults. Replace the sample values with your own and run it.

### Can I run it on a schedule?

Yes. Add this task to an Apify Schedule to repeat it daily or weekly, and export results as JSON, CSV or Excel or call it through the API.

### How much does a run cost?

The Actor is pay per result. Apify shows the exact price on the Actor page before you run it, and the Free plan includes monthly credits to try it.

## About this Actor

This example demonstrates how to use [Prediction Markets API - Kalshi & Polymarket Odds, MCP](https://apify.com/martin10291/prediction-markets-kalshi-polymarket.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/martin10291/prediction-markets-kalshi-polymarket.md) to learn more, explore other use cases, and run it yourself.


## How to integrate an Actor?

This Task's input is already configured above. Use it as-is rather than inventing a new one.

Do not guess an integration path. Every one of them is in the agent quickstart at https://apify.com/agents.md: the Apify MCP server, Agent Skills with the Apify CLI, the JavaScript and Python clients, the REST API, and the account-free path for an agent with no human to sign in. It also carries the rule on stating cost before the first paid run.

For full API examples (JavaScript, Python, CLI, MCP, OpenAPI), see this Task's Actor page: https://apify.com/martin10291/prediction-markets-kalshi-polymarket.md

Each client library has reference documentation the quickstart does not restate: [JavaScript/TypeScript](https://docs.apify.com/api/client/js/docs.md) (`npm install apify-client`) and [Python](https://docs.apify.com/api/client/python/docs.md) (`pip install apify-client`).