About PROPHET

Prediction market intelligence in your language

01 — About This Service

PROPHET is a multilingual media service delivering real-time data from the world's largest prediction markets, Polymarket and Kalshi. Our goal is to make collective intelligence accessible across language barriers. We provide information and analysis only — no trading functionality.

02 — Data Sources

POLYPolymarket

The world's largest crypto-based prediction market. Data fetched from the public Gamma API.

KALSKalshi

CFTC-regulated US prediction market. Sports = 84% of volume. Data from Trade API v2.

NEWSNewsAPI / NHK / CNA

Multilingual news fetched every 15 minutes. Claude AI matches news to prediction markets.

03 — Key Features

Probability ChartPh1

Line charts showing 7d/30d probability trends on each market detail page, fetched from Polymarket CLOB API.

BUZZ ScorePh2

Proprietary attention metric combining volume (35%), liquidity (25%), contention (25%), and Poly vs Kalshi divergence (15%). Hover the badge to see breakdown.

OGP Auto-generationPh3

Share a market on X and a visual card with probability, title, and volume is auto-generated via next/og on Edge.

Related MarketsPh4

Up to 3 related markets shown in the right rail. Claude AI determines semantic relevance and auto-labels groups.

News x Odds MatchingNEW

News from NHK, Bloomberg, Reuters fetched every 15min. Claude AI auto-links to prediction markets.

Multilingual (JA / ZH / EN)

Market titles and AI articles auto-translated via DeepL and Claude API across 3 languages.

Watchlist

Bookmark markets with the heart button. Saved in your browser, no login required.

Movers

Markets with the biggest probability changes in the last 24 hours. Updated hourly.

Web Push Notifications

Get browser notifications when watched markets move ±5%. No login required.

Prophet Rankings

Top traders ranked by profit and win rate. Filter by all-time, monthly, or weekly.

Countdown

Live countdown timers for closing markets, grouped by today, this week, and upcoming.

04 — Market Selection Logic

Top markets are ranked by BUZZ Score, a proprietary metric combining data from both platforms.

BUZZ Score Formula

24h Volume (Poly + Kalshi)x 35%

Liquidity (Poly + Kalshi)x 25%

Contention (closer to 50% = higher)x 25%

Divergence bonus (Poly vs Kalshi gap)x 15%

Max 100. Polymarket 40 + Kalshi 10 = top 50 displayed

05 — Update Frequency

Market dataEvery 15 min

News matchingEvery 15 min

AI articlesEvery 10min (3 articles)

FX ratesHourly

Movers snapshotHourly

Hit archiveManual (12 items)

Push checkHourly

06 — Disclaimer

This service displays data from Polymarket and Kalshi for informational purposes only. We do not facilitate or encourage trading. Please comply with local laws and platform terms before participating in prediction markets. Probabilities shown do not guarantee future outcomes.

07 — About the Developer

PROPHET is a prediction market media service designed, developed, and operated by an independent developer.

Development began in 2025 with the goal of bringing prediction market intelligence to Japanese-speaking audiences.

DeveloperKenta Kido

LocationTokyo, Japan

Contactcontact@prophetmarkets.ai