Polymarket Wallet P&L Analyzer

Docs & recipes: pricing math, use-case playbooks and copy-paste API/MCP snippets · practical guide

A Polymarket wallet analyzer: paste any wallet address and get a reconstructed trading record built purely from the public trade tape — realized trader P&L, win rate over resolved markets, a per-market breakdown, category mix, average entry price, and how often the wallet plays both sides of the same market.

Built for copy trading vetting: found a wallet moving size on a whale tracker or a leaderboard? Run it through this analyzer before you even think about copying it — is the P&L real, is the win rate built on resolved markets, and is the "trader" actually a hedger you should never follow?

What makes this analysis trustworthy

Most "profit leaderboards" hide their method. This Actor is explicit about its accounting — and about its blind spots:

• Net-position accounting — BUYs and SELLs are aggregated per market and per outcome token; resolved markets settle remaining net shares at $1 (winner) / $0 (loser) using public on-chain resolutions.
• Negative-risk mint detection — wallets that acquire outcome shares through the neg-risk adapter show up on the tape as selling shares they never bought. Naively counting those sells fabricates profit. Markets where sell volume exceeds buy volume by 1.5× are flagged excluded_mint and kept out of realized P&L.
• Honest coverage flags — the public tape caps pagination depth (~3,000 trades per query). If a wallet out-trades the cap, the report says so (coverage_capped: true) and states exactly which time span the stats cover, instead of silently pretending it's the full window.
• Open positions never inflate P&L — unresolved markets are reported separately with net shares and cost basis; realized P&L and win rate count only resolved markets.

Output

One summary row (also stored as the run's OUTPUT record):

{
  "record_type": "summary",
  "wallet": "0xd3bc202269d0bbd1a158264be8f7e1e0f9e45bd2",
  "window_days": 30,
  "trades_analyzed": 481,
  "markets_traded": 37,
  "realized_pnl_usd": 12840.55,
  "resolved_markets": 29,
  "wins": 19,
  "win_rate": 0.6552,
  "open_markets": 6,
  "mint_excluded_markets": 2,
  "two_sided_share": 0.081,
  "avg_entry_price": 0.6421,
  "category_mix": {"Crypto": 0.71, "Politics": 0.22, "Sports": 0.07},
  "coverage_capped": false,
  "earliest_trade_covered_utc": "2026-07-05T11:02:44+00:00"
}

Plus one flat market row per market traded:

Field	Meaning
status	resolved, open, or excluded_mint
buy_usd / sell_usd	Gross flow in the window
avg_entry_price	Share-weighted average buy price
net_shares	Position remaining at resolution (or now, if open)
realized_pnl_usd	Settled P&L (resolved markets only)
win	Whether the market ended profitable
two_sided	Wallet bought 2+ outcomes of this market (hedging/making)

Input

Field	Default	Description
wallet	— (required)	0x… Polymarket proxy wallet address
days	30	Analysis window
include_open_positions	true	Also output unresolved-market rows

Use cases

Copy-trading due diligence

Is that "hot" wallet actually profitable over resolved markets, or is its P&L a minting artifact? Is it a hedger/market-maker you shouldn't follow? The two_sided flags answer that directly.

Leaderboard verification

Independently reconstruct claimed profits from public data instead of trusting a screenshot.

Research at scale

Feed a list of wallets from a whale-trades run, one Actor call each, and rank by realized P&L and win rate.

Using from Claude / AI agents (MCP)

Add Apify's MCP server (https://mcp.apify.com) to Claude, Cursor, or any MCP-capable client and your agent can vet a trader with real numbers mid-conversation:

{
  "tool": "polymarket-wallet-pnl",
  "input": { "wallet": "0xd3bc202269d0bbd1a158264be8f7e1e0f9e45bd2", "days": 30 }
}

"Is wallet 0xd3bc… worth copying?" — one call returns realized P&L, win rate, hedging share, and the coverage caveats an honest answer needs.

Data source and fair use

Only Polymarket's public, unauthenticated APIs are used (trade tape + market resolutions). No keys, no login. Addresses analyzed are already public on polymarket.com. Results are estimates reconstructed from public fills; deposits/withdrawals, rewards, and off-tape transfers are out of scope by design.

Pricing

Pay per event: one flat fee per wallet analyzed. No surprises — the price is the same whether the wallet has 5 trades or 3,000.