About Strategy Scanner

Prediction market traders are entirely public. Every fill, split, merge and redemption is a transaction on Polygon. What was missing was a way to read a wallet — because the obvious approach gives an answer that is not merely imprecise but often backwards.

Polymarket's positions endpoint returns only what a wallet still holds or can still redeem. Redeem a winner and the row is deleted; losers sit there forever as resolved rows worth nothing. Summing it keeps the losses and throws away the wins. Measured on a top leaderboard wallet, that sum read −$663,368 for a wallet genuinely up about $3.6 million.

Getting that right is most of what this tool does. The method is written out in full in the guide, not hidden behind a marketing claim about accuracy.

One rule governs the interface:

• Never present a number as more certain than its source. Figures that cover a wallet's whole life are shown plainly. Figures derived from a bounded window of recent activity are labelled “Recent”, and the window is stated on screen.
• Exclude what cannot be verified, and say so. Markets whose history falls outside the window, or whose value moved through a neg-risk conversion, are listed but not counted — and the page reports how many were counted out of how many were touched.
• Ship nothing misleading, even if it looks impressive. A deposits-and-withdrawals view and a copy-trade simulator were both built, both worked, and both were pulled: one returned an undercount because public nodes had pruned the blocks it needed, the other needed a complete fill history to mean anything. They return when they can be done properly.
• Make every figure checkable. Trade rows link to Polygonscan. Nothing here asks to be taken on trust.

Everything is public. No private feeds, no scraped accounts, no wallet connections.

• Polymarket public APIs — positions, activity, portfolio value and the lifetime PnL series.
• Public Polygon RPC — live stablecoin balances, read straight from the token contracts.
• Polygonscan — where every trade row links, so any figure can be confirmed independently.

Polymarket's API is an index of Polygon's own event log, so this is chain data, arriving faster than a self-hosted indexer could manage.

Strategy Scanner is not affiliated with, endorsed by, or connected to Polymarket, Polygon, or any exchange or market maker. It is an independent reader of public data.

It is free to use, with no account and no paywall. Running costs are covered by advertising; if and when ads appear, they will be clearly distinguishable from the data, and no advertiser has any influence over what the numbers say.

Corrections, bug reports and feature requests are all welcome — particularly a wallet where a figure looks wrong, which is the most useful thing anyone can send. Reach us at hello@codewithzaheer.com or through the contact page.

Strategy Scanner reports what public data shows about past activity. It does not recommend trades, predict outcomes or evaluate anyone as an investment. Past performance does not predict future results, and mirroring a large trader at a small size behaves very differently from the original. Prediction markets can lose you money, and may be restricted where you live.