# Compare Kalshi and Polymarket odds on Bitcoin markets

**Use case:** 

List open Kalshi and Polymarket markets about a topic with current odds and volume. Each row has the market question, venue, yes and no price, volume and close date, matched across both venues when they ask the same question.

## Input

```json
{
  "query": "bitcoin",
  "venues": [
    "polymarket",
    "kalshi"
  ],
  "status": "open",
  "category": "",
  "minVolume": 0,
  "maxResults": 20,
  "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 Kalshi and Polymarket odds on Bitcoin markets". [Sign up or log in](https://console.apify.com/create-task-from-example/2lmw2w5ogE2dioMoR) and you'll land in Apify Console with a copy of this exact task.

### 2. Start the "Compare Kalshi and Polymarket odds on Bitcoin markets" 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 Kalshi and Polymarket odds on Bitcoin markets" 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 Kalshi and Polymarket odds on Bitcoin markets" task via API](https://apify.com/martin10291/prediction-markets-kalshi-polymarket.md).

## FAQ

### How much does a run cost?

You pay per result: $0.001 per result on the Free plan (about $1.00 per 1,000). Paid Apify plans get lower tiered prices.

### What can I change in the input?

Edit query, venues, status, category, minVolume and maxResults. A monitorId plus minPriceMovePts reports only big odds moves.

### Can I run it on a schedule?

Yes. Add this task to an Apify Schedule (for example daily) and read the dataset after each run. This task has no only-new switch, so each run returns the full result for your input.

## 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`).