Kramma
04

Performance audit

Am I good, and am I safe, answered for any Polymarket wallet from public data. No account, no API key, nothing to install.

Scoring a forecast requires knowing what someone believed before the outcome, which is why every other tool asks traders to log a probability against each position and then wait dozens of trades to learn anything. That step is unnecessary here. Every fill on Polymarket settles on Polygon with a price and a timestamp attached, so the record already exists: the price paid is the probability revealed.

Brier score
0.1965
across 12 resolved positions · lower is better
Skill vs own base rate
+21%
beating a trader who only knew how often they win
Calibration error
17.0pp
average gap between price paid and what happened
Win rate
50%
6 of 12 paid out

Am I good

Each row is a band of entry prices. Paid is the average price actually paid, which is the probability the wallet revealed by buying. Happened is how often those positions paid out. A well-calibrated trader has the two columns tracking each other.

Entry bandPositionsPaidHappenedGap
10–25%316%33%+17pp
25–40%232%0%−32pp
40–60%552%60%+8pp
60–75%169%100%+31pp
75–90%181%100%+19pp

A positive gap means the wallet was under-confident in that band, it won more often than the price it paid implied. Negative means over-confident.

Am I safe

Open exposure
$158.3K
6 open positions
Largest position
49%
share of open capital in one contract
Half the book
2
positions hold half the exposure
Unrealised
−$5.8K
against $158.3K of open value

The resolved record

Every settled position, rebuilt from on-chain fills. Realised $85.6K across 12 positions, with $2.1K of entry fees paid.

MarketPaidResultSizeP&L
Arizona Diamondbacks vs. San Francisco Giants — San Francisco Giants0.4286won54,935$31.4K
Colorado Rockies vs. Washington Nationals — Washington Nationals0.6895won95,000$29.5K
49ers vs. Raiders — Raiders0.5000lost39,131−$19.6K
Valorant: LOUD vs FURIA Esports - Map 1 Winner — FURIA Esports0.3487lost526−$184
Counter-Strike: Team Falcons vs Lynn Vision (BO3) - BLAST Open Porto Group B — Team Falcons0.8072won105,918$20.4K
Counter-Strike: Natus Vincere vs M80 - Map 1 Winner — Natus Vincere0.5500won21,407$9.6K
Dota 2: TEAM VISION vs Team Spirit (BO5) - The International Playoffs — TEAM VISION0.5700lost6,561−$3.7K
Dota 2: Team Yandex vs Team Spirit - Game 2 Winner — Team Spirit0.5700won16,827$7.2K
Eagles vs. Patriots — Patriots0.1799won20,000$16.4K
Dota 2: TEAM VISION vs Team Yandex (BO3) - The International Playoffs — Team Yandex0.3000lost17,893−$5.4K
Will the Fed increase interest rates by 25 bps after the July 2026 meeting? — Yes0.1841lost543−$100
Will Claude Fable 5 be restored for US customers by July 10? — No0.1300lost317−$41

Swipe the table sideways to see every column.

Polymarket only. Kalshi is a regulated exchange with a private database, its per-account endpoints require the account holder's own credentials, so there is no equivalent public record to read. Method →