# Polymarket Whale Tracker - Live Trades, $0.00225/Trade (`gio21/polymarket-whale-tracker-scraper`) Actor

Track large trades on Polymarket, filtered by minimum USD size, market and side. Wallet, size, price, outcome, market title, tx hash. Filtered trades cost nothing. $0.00225/trade.

- **URL**: https://apify.com/gio21/polymarket-whale-tracker-scraper.md
- **Developed by:** [Gio](https://apify.com/gio21) (community)
- **Categories:** Other, AI, Automation
- **Features:** Limited permissions
- **Stats:** 87 total users, 3 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

$2.25 / 1,000 trade scrapeds

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?

An Actor is a serverless cloud program that runs on the Apify platform. It has two run modes.
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.

Apify vocabulary and the platform model are defined once, in the agent quickstart at https://apify.com/agents.md.

## 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.

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 examples already wired to this Actor's own input schema, see the [API](#api) section below.

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`).

# README

## Polymarket Whale Tracker - Live Trades, $0.00225/Trade

Track large trades on [Polymarket](https://polymarket.com), the biggest crypto prediction market, filtered directly at the source by minimum USD size so you only pay for trades that actually qualify as whale activity, not the entire firehose of small retail fills.

### Why use this scraper

Polymarket does not surface a "whale feed" anywhere on its own site. Every trade, from a $2 bet to a $500,000 position, shows up mixed together in the same activity stream, and no official tool lets you filter that stream by size before you have to sift through it yourself. Traders and researchers who want to follow smart money end up either watching the site manually or writing their own integration against Polymarket's data API.

This actor does the filtering server-side: you set a minimum USD size and, optionally, a market slug and trade side, and only trades that clear your threshold come back, priced per trade. You pay for signal, not noise, and you never get billed for the small retail fills you would have had to scroll past manually.

### Overview

Given a minimum trade size and optional market and side filters, the actor returns one row per qualifying trade, each with the wallet address, trader's public pseudonym, side, size in both shares and USD, execution price, market title and outcome, and a link to the on-chain transaction. Filtered-out trades (below your USD threshold) are never billed. A typical run completes in seconds since it reads Polymarket's own data feed directly with no page rendering involved.

### Supported inputs

- **Minimum trade size** - `minSizeUsd` sets the USD floor a trade must clear to be returned and billed; Polymarket whales typically trade $5,000 to $100,000+.
- **Market filter** - `marketSlug` matches by substring against Polymarket's event slug, for example `"presidential"` or `"eth"`, to focus on one market or topic.
- **Side filter** - `side` narrows to `BUY` only, `SELL` only, or `ANY` (default) for both.
- **Result cap** - `maxItems` caps how many trades a single run returns and bills.

Filters can be combined, for example only BUY trades of $10,000 or more on markets whose slug contains "eth".

### Use cases

- **Smart-money signal building** - feed whale BUY/SELL activity on a market into a trading or sentiment model to see where large capital is positioning ahead of an event.
- **Election and macro-event monitoring** - track whale entries and exits on political or macroeconomic markets in the run-up to a resolution date.
- **Trading dashboards and alerts** - schedule the actor and push new qualifying trades into a dashboard or notification channel in near real time.
- **On-chain research** - use the returned `wallet` and `transactionHash` fields to cross-reference a trader's broader on-chain activity outside Polymarket itself.
- **Copy-trading research** - track a known high-conviction wallet's `BUY` and `SELL` activity over time to study its track record before deciding whether to follow its positioning on future markets.

### How it works

The actor reads Polymarket's own public trade data feed and applies the USD-size, market-slug and side filters you set before returning results, so filtering happens at the source instead of after you have already paid for every trade. Because it is reading a structured trade feed rather than rendering the Polymarket website, a batch of qualifying trades comes back in seconds.

### Input configuration

Default whale threshold, all markets, both sides:

```json
{
  "minSizeUsd": 5000,
  "side": "ANY",
  "maxItems": 100
}
```

Large BUY-only trades on a specific market:

```json
{
  "minSizeUsd": 10000,
  "marketSlug": "presidential",
  "side": "BUY",
  "maxItems": 50
}
```

Very large trades across all markets, small batch:

```json
{
  "minSizeUsd": 50000,
  "side": "ANY",
  "maxItems": 20
}
```

### Output sample

Real output from a production run against Polymarket:

```json
[
  {
    "timestamp": 1790017824,
    "timestamp_iso": "2026-09-21T19:10:24.000Z",
    "side": "BUY",
    "sizeShares": 1483.74,
    "price": 0.81,
    "sizeUsd": 1201.83,
    "outcome": "Yes",
    "outcomeIndex": 0,
    "title": "Will CA Aldosivi win on 2026-09-21?",
    "slug": "arg-ald-cat-2026-09-21-ald",
    "eventSlug": "arg-ald-cat-2026-09-21",
    "wallet": "0x821dab0565ebf5b327f51db06223fdcfe01acf16",
    "traderName": "Flaznorp",
    "traderPseudonym": "Brisk-Clockwork-Behalf",
    "transactionHash": "0x0f9222bef15c1d5b4a1c60318ab84794a479e3daf039fcfea17607c4d80ea6e1",
    "url": "https://polygonscan.com/tx/0x0f9222bef15c1d5b4a1c60318ab84794a479e3daf039fcfea17607c4d80ea6e1",
    "scrapedAt": "2026-09-21T19:13:05.943Z"
  }
]
```

### Key output fields

| Field | Type | Description |
|-------|------|--------------|
| `timestamp_iso` | string (ISO date) | When the trade executed |
| `side` | string | `BUY` or `SELL` |
| `sizeShares` | number | Trade size in outcome shares |
| `price` | number | Execution price (0 to 1, implied probability) |
| `sizeUsd` | number | Trade size in USD, the field the `minSizeUsd` filter checks against |
| `outcome` | string | Outcome traded, e.g. "Yes" or "No" |
| `title` | string | Market question/title |
| `slug` | string | Market slug |
| `eventSlug` | string | Parent event slug, useful for grouping related markets |
| `wallet` | string | Trader's wallet address |
| `traderName` / `traderPseudonym` | string | Trader's display name and public pseudonym on Polymarket |
| `transactionHash` | string | On-chain transaction hash |
| `url` | string | Link to the transaction on Polygonscan |
| `scrapedAt` | string (ISO date) | When this actor fetched the record |

### Pricing

Pay-per-result pricing, no subscription:

| Event | Price |
|-------|-------|
| Trade scraped | $0.00225 per trade |
| Minimum charge per run | $0.05 |

Trades below your `minSizeUsd` threshold are filtered out before billing, so you never pay for noise. 1,000 qualifying trades costs $2.25.

### What makes this richer than the competition

Compared to two of the more-used Polymarket scrapers on the Store:

- **scrapemint/polymarket-market-monitor** tracks markets by category (odds and volume at the market level) but does not return individual trade-level records, so it cannot answer "which specific wallets just made a large bet."
- **scrapemint/polymarket-scraper** covers order book and price data but does not expose a server-side USD-size filter for whale trades, so isolating large trades means pulling the full trade stream and filtering it yourself after paying for it.

This actor filters by USD size, market and side before billing, and returns the wallet, transaction hash and trader pseudonym alongside the trade itself, so you get the on-chain trail in the same row as the trade data.

### Notes & limitations

- `traderName` and `traderPseudonym` reflect whatever public display name Polymarket has for that wallet; many wallets have no name set and both fields may be blank.
- The actor tracks trade activity, not open positions; a wallet's current holdings are not part of this actor's output.
- Coverage matches Polymarket's own public trade feed; a market that has just launched may have too few trades to show meaningful whale activity yet.
- `sizeUsd` reflects the value at execution price and share count; it is not adjusted after the fact if the market's price later moves.
- This actor does not execute trades or interact with any wallet; it only reads Polymarket's public trade data.

A single large position is often split into several smaller trades by the trader or by Polymarket's own order matching, so a wallet building a big position may show up as multiple rows close together in time rather than one. Grouping by `wallet` and a time window downstream gives a more accurate picture of total position size than looking at any single row in isolation.

### FAQ

**What counts as a "whale" trade?**
Whatever you set `minSizeUsd` to. Polymarket whales typically trade $5,000 to $100,000+, but you can set any floor.

**Do I pay for trades below my threshold?**
No. Trades below `minSizeUsd` are filtered out server-side before billing; you only pay for trades that qualify.

**Can I track one specific market only?**
Yes, set `marketSlug` to a substring of the event slug you want, for example `"presidential"` or `"eth"`.

**Can I follow a specific wallet?**
Not directly as an input filter today; use `wallet` in the output to filter downstream for a specific address across runs.

**How current is the data?**
Every run reads Polymarket's live trade feed at execution time.

**Can I run this on a schedule for alerts?**
Yes, schedule the actor and push new qualifying trades (deduplicated on `transactionHash`) into your own alerting or dashboard system.

**Does the actor tell me if a whale is right or wrong?**
No, it returns the trade itself, not a win/loss outcome. Resolving whether a position paid off requires tracking the market to resolution separately.

### For AI Agents & LLM Apps

This actor is available over the [Apify MCP server](https://mcp.apify.com) for direct use inside Claude, ChatGPT and other MCP-compatible agents, or via the Apify API for a synchronous call that returns dataset items in one request:

```bash
curl "https://api.apify.com/v2/acts/gio21~polymarket-whale-tracker-scraper/run-sync-get-dataset-items?token=$APIFY_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"minSizeUsd": 10000, "side": "ANY", "maxItems": 20}'
```

The response is a JSON array of trade objects, ready to feed into an agent's context or a trading-signal pipeline without any extra parsing step.

### Disclaimer

Polymarket is a trademark of its respective owner. This actor is an independent tool that reads Polymarket's public trade data; it is not affiliated with, endorsed by, or sponsored by Polymarket.

### SEO Keywords

Polymarket scraper, Polymarket API, Polymarket whale tracker, Polymarket trades API, prediction market scraper, Polymarket smart money, Polymarket on-chain data, crypto prediction market API, Polymarket trade data, Polymarket large trades.

# Actor input Schema

## `minSizeUsd` (type: `integer`):

Only return trades >= this USD amount. Whales typically trade $5,000–$100,000+.

## `marketSlug` (type: `string`):

Filter by Polymarket event slug (substring match, e.g. 'presidential', 'eth'). Empty = all markets.

## `side` (type: `string`):

Filter by side. ANY = both BUY and SELL.

## `maxItems` (type: `integer`):

Max trades to return. $0.005 per trade.

## Actor input object example

```json
{
  "minSizeUsd": 5000,
  "marketSlug": "",
  "side": "ANY",
  "maxItems": 25
}
```

# Actor output Schema

## `results` (type: `string`):

Dataset items

# 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 = {
    "minSizeUsd": 5000,
    "maxItems": 25
};

// Run the Actor and wait for it to finish
const run = await client.actor("gio21/polymarket-whale-tracker-scraper").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 = {
    "minSizeUsd": 5000,
    "maxItems": 25,
}

# Run the Actor and wait for it to finish
run = client.actor("gio21/polymarket-whale-tracker-scraper").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 '{
  "minSizeUsd": 5000,
  "maxItems": 25
}' |
apify call gio21/polymarket-whale-tracker-scraper --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "type": "http",
            "url": "https://mcp.apify.com/?tools=fetch-actor-details,gio21/polymarket-whale-tracker-scraper"
        }
    }
}
```

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/pPeaqTNM8KCBa8C51/builds/tGi8a3eKrNVQ2J9Yr/openapi.json