nansen-polymarket-insider-scan

Scan a resolved Polymarket market for wallets exhibiting suspicious trading patterns: fresh funding, single-market focus, extreme ROI, late entry at high prices.

By nansen-ai · 365 installs

npx skills add nansen-ai/nansen-cli --skill nansen-polymarket-insider-scan

Source repository · Upstream listing

PM Suspicious Wallet Scanner Answers: "Are there wallets with suspicious trading patterns in this Polymarket market?" For each winner, compute ROI = total pnl usd / net buy cost usd 100 (skip ROI flags if net buy cost usd <= 0), then score (0–13). Within each tier group, apply only the highest matching flag: Flag Pts Trigger NEW WALLET 3 First funded within 7 days of now YOUNG WALLET 1 First funded 8–28 days ago (skip if NEW WALLET fires) SINGLE MARKET 3 trades by address shows only 1 distinct market id FEW MARKETS 1 2–3 distinct market ids (skip if SINGLE MARKET fires) EXTREME ROI 3 ROI = 500% HIGH ROI 2 ROI 200–499% (skip if EXTREME ROI fires) LATE ENTRY 2 Any trade on this market at price = 0.80 LARGE POSITION 2 net buy cost usd = $10k KNOWN ENTITY 2 Has Nansen labels Flagged at score = 3. High risk at = 7. High confidence suspicious pattern: NEW WALLET + SINGLE MARKET + EXTREME ROI (score 9+). If owner address is invalid (e.g. "0x"), use the proxy address for profiler calls too. If historical balances returns no records with value usd 0, the wallet may predate the 365 day window — treat wallet age as unknown and skip NEW WALLET / YOUNG WALLET flags. Pause ~1.5s between wallets to avoid rate limits. Skip wallets that error and continue scanning.