Polymarket Top Traders Scraper — Whale Positions & Copy-Trading Feed

See exactly what the most profitable Polymarket traders are holding right now. This Actor pulls the official Polymarket leaderboard (top PnL or top volume, daily to all-time) and then fetches every live position of those whales: market, side (Yes/No), entry price vs. current price, position size, live dollar PnL and % return.

One run = a ranked copy-trading feed. No wallet, no login, no proxies — pure fast HTTP.

Who is this for?

• Copy traders — stop guessing. Follow the 25 most profitable wallets of the month and see the exact markets and sides they're betting on today, sorted by position size.
• Prediction-market analysts & newsletter writers — "what does smart money believe?" as a clean dataset: whale consensus per market, entry vs. current odds.
• Quant / AI-agent builders — a structured smart-money signal you can pull on a schedule and feed straight into your models or agents.
• Journalists & researchers — track how top traders position around elections, sports, crypto and macro events.

What you get (per row)

Field	Description
rank, wallet, traderName, traderUrl	Leaderboard rank + wallet + display name + profile link
windowPnlUsd, windowVolumeUsd, window, rankType	Trader's profit and volume in the chosen window (e.g. last 30 days)
marketTitle, marketSlug, marketUrl, eventSlug	The market they're in, with direct link
outcome, oppositeOutcome	Which side the whale is holding (Yes/No)
sizeShares, avgPrice, curPrice	Position size, their entry price and the current price
initialValueUsd, currentValueUsd	What they paid vs. what it's worth now
cashPnlUsd, percentPnl, realizedPnlUsd	Live unrealized PnL in $ and %, plus realized PnL
redeemable, negativeRisk, endDate	Market state + resolution date
scrapedAt	Snapshot timestamp

Modes:

• Leaderboard mode (default): top N traders by PnL or volume — 24h, 7d, 30d or all-time.
• Watchlist mode: pass your own wallets list and monitor those specific traders — your private copy-trading watchlist.
• Summary mode (maxPositionsPerTrader: 0): one compact row per trader (open positions count, total open value, unrealized PnL).
• Monitor mode (onlyNew: true): remembers what it has seen and only outputs (and charges) new positions — perfect for "alert me when a whale opens a new bet".

Pricing — pay only for what you get

Pay-per-event: $0.008 per position row ($8 per 1,000) + $0.001 per run start. Fair-play guarantee: traders with no qualifying positions, failed lookups, filtered-out positions and monitor-mode duplicates are never charged. Default settings (25 traders × max 25 positions) cost at most ~$5 per full snapshot, typically far less.

Example input

{
  "window": "1m",
  "rankType": "pnl",
  "topTraders": 25,
  "maxPositionsPerTrader": 25,
  "minPositionValueUsd": 1000,
  "onlyNew": false
}

Schedule it (recommended)

Whale positions move daily. In Apify Console click Schedule on this Actor and pick e.g. @daily. Combine with onlyNew: true and you get a feed of fresh whale entries only — wire it to Slack/email/Zapier via Integrations, or export JSON/CSV/Excel from the dataset.

Use with AI agents & MCP

This Actor works out of the box with the Apify MCP server — let your AI agent (Claude, GPT, LangChain, CrewAI, n8n…) ask things like "what are the top Polymarket whales buying today?" and act on the answer. The output schema is stable and agent-friendly: call it via API at https://api.apify.com/v2/acts/tactful_anvil~polymarket-top-traders-scraper/runs, then read the default dataset items.

Related Actors

• Polymarket + Kalshi Arbitrage Scanner — risk-free price discrepancies across both platforms.
• Kalshi Weather Markets Scraper — every Kalshi weather market with live odds.

Legal & fair use

This Actor reads only publicly available data from Polymarket's public API — the same data shown on public profile and leaderboard pages. No login, no scraping behind authentication. Respectful request rates. For research and information purposes; not financial advice — prediction markets involve risk, and past whale performance does not guarantee future results.