# Polymarket vs Kalshi arbitrage scanner (matched markets)

**Use case:** 

Matches the same real-world event across Polymarket and Kalshi and reports the price gap: both prices, spread, implied arbitrage after fees, volume and links. Scan hundreds of pairs in one run. Public market data, not investment advice. Pay per result, HTTP-only.

## Input

```json
{
  "minPolyVolumeUsd": 5000,
  "maxPairs": 500
}
```

## Output

```json
{
  "question": {
    "label": "Polymarket question",
    "format": "string"
  },
  "netEdgePct": {
    "label": "Net edge %",
    "format": "number"
  },
  "grossEdgePct": {
    "label": "Gross edge %",
    "format": "number"
  },
  "direction": {
    "label": "Arb direction",
    "format": "string"
  },
  "polyYesAsk": {
    "label": "Poly YES ask",
    "format": "number"
  },
  "kalshiYesAsk": {
    "label": "Kalshi YES ask",
    "format": "number"
  },
  "matchScore": {
    "label": "Match score",
    "format": "number"
  },
  "isArb": {
    "label": "Verified arb?",
    "format": "boolean"
  },
  "polyUrl": {
    "label": "Polymarket URL",
    "format": "string"
  },
  "kalshiUrl": {
    "label": "Kalshi URL",
    "format": "string"
  }
}
```

## About this Actor

This example demonstrates how to use [Polymarket Kalshi Arbitrage Scanner | Matched Markets & Edge](https://apify.com/tactful_anvil/polymarket-kalshi-arbitrage-scanner.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/tactful_anvil/polymarket-kalshi-arbitrage-scanner.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/tactful_anvil/polymarket-kalshi-arbitrage-scanner.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`).