# Prediction Market Movers — Polymarket & Kalshi Catalyst Feed (`tactful_anvil/prediction-market-movers`) Actor

The biggest odds swings, volume spikes and closing-soon catalysts across Polymarket AND Kalshi in one ranked feed — each with a 0-100 catalyst score and signals. HTTP-only public APIs, no keys, no login. You pay only for ranked mover rows.

- **URL**: https://apify.com/tactful\_anvil/prediction-market-movers.md
- **Developed by:** [Mr Zack](https://apify.com/tactful_anvil) (community)
- **Categories:**
- **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

from $9.60 / 1,000 mover rows

This Actor is paid per event. You are not charged for the Apify platform usage, but only a fixed price for specific events.

Learn more: https://docs.apify.com/actors/running/actors-in-store.md#pay-per-event

## What's an Apify Actor?

Actors are web data automations that power AI and operations. They run on the Apify platform to scrape websites, process data, connect APIs, and automate workflows.
In Batch mode, an Actor accepts a well-defined JSON input, performs an action which can take anything from a few seconds to a few hours,
and optionally produces a well-defined JSON output, datasets with results, or files in key-value store.
In Standby mode, an Actor provides a web server which can be used as a website, API, or an MCP server.
Actors are written with capital "A".

## How to integrate an Actor?

If asked about integration, you help developers integrate Actors into their projects.
You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready.
The best way to integrate Actors is as follows.

- **AI agents and MCP clients** — the [Apify MCP server](https://docs.apify.com/integrations/mcp.md) at `https://mcp.apify.com` (remote, streamable HTTP, OAuth on first use).
- **Agentic workflows and local Actor development** — [Agent Skills](https://apify.com/.well-known/agent-skills/index.json) with the [Apify CLI](https://docs.apify.com/cli/docs.md): `npm install -g apify-cli`, then `apify login`.
- **JavaScript/TypeScript projects** — the official [JS/TS client](https://docs.apify.com/api/client/js/docs.md): `npm install apify-client`.
- **Python projects** — the official [Python client](https://docs.apify.com/api/client/python/docs.md): `pip install apify-client`.
- **Any other language** — the [REST API](https://docs.apify.com/api/v2.md).

For usage examples, see the [API](#api) section below.

For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt).

# README

## Prediction Market Movers — Biggest Odds Swings on Polymarket & Kalshi

**Find the markets where something is happening — before everyone else does.** One run scans the top markets on **both Polymarket and Kalshi** and returns a single ranked feed of the biggest catalysts: 24-hour odds swings, volume spikes, fast 1-hour movers and markets closing within 48 hours — each with a 0-100 **catalyst score**.

No API keys, no wallet, no proxies. Pure fast HTTP against both platforms' public APIs.

### Who is this for?

- **Prediction market traders** — a daily (or hourly) shortlist of where the action is: what moved 10+ points, what's spiking in volume, what resolves tonight.
- **News desks & newsletter writers** — "what do markets suddenly believe?" ranked and structured. Big odds swings *are* the story.
- **Quants & AI agents** — a clean cross-platform catalyst signal to trigger deeper analysis, alerts or research pipelines.
- **Kalshi ↔ Polymarket arbitrageurs** — movers create temporary mispricings; catch them as they form.

### What you get (per row)

| Field | Description |
|---|---|
| `rank`, `catalystScore` | Position in the ranked feed + 0-100 combined activity score |
| `signals` | `BIG_SWING`, `VOLUME_SPIKE`, `CLOSING_SOON`, `FAST_MOVER_1H`, `LIVE_EVENT` |
| `platform`, `marketId`, `title`, `category`, `url` | Which market, on which platform, with direct link |
| `yesPrice`, `impliedProbabilityPct` | Current Yes price / implied probability |
| `priceChange24h`, `priceChange1h` | Odds movement over 24h and 1h (1h: Polymarket) |
| `volume24hUsd`, `volumeTotalUsd`, `liquidityUsd`, `openInterest` | Money flowing through the market |
| `spread`, `bestBid`, `bestAsk` | Execution quality right now |
| `closeTime`, `hoursToClose` | When it resolves |
| `scrapedAt` | Snapshot timestamp |

**Catalyst score** = 45% odds swing (24h) + 35% dollar volume (24h) + 10% closing-within-48h + 10% 1-hour momentum. Sort by raw price move or raw volume instead if you prefer.

### Pricing — pay only for the shortlist

Pay-per-event: **$0.0096 per mover row** ($9.60 per 1,000) + $0.001 per run start. Scanning hundreds of markets is free — you pay only for the ranked rows that pass your filters (default: top 100). Junk zero-volume markets, filtered-out markets and failed fetches are **never charged**. A default daily run costs about **$0.97**.

### Example input

```json
{
  "platforms": ["polymarket", "kalshi"],
  "minVolume24hUsd": 5000,
  "minAbsPriceChange24h": "0.05",
  "maxRows": 50,
  "sortBy": "catalystScore"
}
```

→ "the 50 biggest catalysts across both platforms, at least a 5-point swing, at least $5k traded today."

### Schedule it (recommended)

Catalysts die fast. Click **Schedule** in Apify Console — `@hourly` during market hours or `@daily` for a morning briefing. Wire the dataset to Slack/Discord/email via Integrations, or export JSON/CSV.

### Use with AI agents & MCP

Works out of the box with the [Apify MCP server](https://mcp.apify.com): let your agent ask *"which prediction markets moved the most today and why might that be?"* — the `signals` array and stable schema are built for automated reasoning. API: `https://api.apify.com/v2/acts/tactful_anvil~prediction-market-movers/runs`.

### Related Actors

- [Polymarket Top Traders Scraper — Whale Positions & Copy Feed](https://apify.com/tactful_anvil/polymarket-top-traders-scraper) — see what the most profitable whales hold in the markets that are moving.
- [Polymarket + Kalshi Arbitrage Scanner](https://apify.com/tactful_anvil/polymarket-kalshi-arbitrage-scanner) — fee-adjusted risk-free spreads between the two platforms.
- [Kalshi Weather Markets Scraper](https://apify.com/tactful_anvil/kalshi-weather-markets-scraper) — every Kalshi weather market with live odds.

### Legal & fair use

Reads only public, unauthenticated JSON APIs (Polymarket Gamma API, Kalshi trade API v2) with polite pacing. Market data, not financial advice — verify prices on-platform before trading.

# Actor input Schema

## `platforms` (type: `array`):

Which prediction markets to scan.

## `topMarketsPerPlatform` (type: `integer`):

How many top-volume markets to scan per platform before ranking (max 500). Scanning is free — you only pay for output rows.

## `minVolume24hUsd` (type: `integer`):

Skip markets that traded less than this in the last 24h. Skipped markets are never charged.

## `minAbsPriceChange24h` (type: `string`):

Only output markets whose odds moved at least this much in 24h (e.g. 0.05 = 5 points). 0 = no filter.

## `maxRows` (type: `integer`):

Cap on ranked output rows (max 500).

## `sortBy` (type: `string`):

catalystScore = combined swing + volume + closing-soon + momentum signal (recommended).

## `keyword` (type: `string`):

Only markets whose title contains this text, e.g. 'fed', 'bitcoin', 'election'.

## Actor input object example

```json
{
  "platforms": [
    "polymarket",
    "kalshi"
  ],
  "topMarketsPerPlatform": 200,
  "minVolume24hUsd": 1000,
  "minAbsPriceChange24h": "0",
  "maxRows": 100,
  "sortBy": "catalystScore",
  "keyword": ""
}
```

# Actor output Schema

## `movers` (type: `string`):

No description

# API

You can run this Actor programmatically using our API. Below are code examples in JavaScript, Python, and CLI, as well as the OpenAPI specification and MCP server setup.

## JavaScript example

```javascript
import { ApifyClient } from 'apify-client';

// Initialize the ApifyClient with your Apify API token
// Replace the '<YOUR_API_TOKEN>' with your token
const client = new ApifyClient({
    token: '<YOUR_API_TOKEN>',
});

// Prepare Actor input
const input = {};

// Run the Actor and wait for it to finish
const run = await client.actor("tactful_anvil/prediction-market-movers").call(input);

// Fetch and print Actor results from the run's dataset (if any)
console.log('Results from dataset');
console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`);
const { items } = await client.dataset(run.defaultDatasetId).listItems();
items.forEach((item) => {
    console.dir(item);
});

// 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs

```

## Python example

```python
from apify_client import ApifyClient

# Initialize the ApifyClient with your Apify API token
# Replace '<YOUR_API_TOKEN>' with your token.
client = ApifyClient("<YOUR_API_TOKEN>")

# Prepare the Actor input
run_input = {}

# Run the Actor and wait for it to finish
run = client.actor("tactful_anvil/prediction-market-movers").call(run_input=run_input)

# Fetch and print Actor results from the run's dataset (if there are any)
print(f"💾 Check your data here: https://console.apify.com/storage/datasets/{run.default_dataset_id}")
for item in client.dataset(run.default_dataset_id).iterate_items():
    print(item)

# 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/python/docs/quick-start

```

## CLI example

```bash
echo '{}' |
apify call tactful_anvil/prediction-market-movers --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "type": "http",
            "url": "https://mcp.apify.com/?tools=fetch-actor-details,tactful_anvil/prediction-market-movers"
        }
    }
}

```

The hosted server signs you in with OAuth on first connect, so no API token belongs in this config. Clients without OAuth support can send an `Authorization: Bearer <APIFY_API_TOKEN>` header instead, using a token from API & Integrations in Apify Console (https://console.apify.com/settings/integrations).

## OpenAPI specification

Download the OpenAPI definition: https://api.apify.com/v2/actors/JDDyRVmRAiwiX4Jq2/builds/8E1uuV0tgp8BVPKJT/openapi.json