Polymarket

CFTC-registered DCM via QCX acquisition (Nov 2025); US retail access restored via intermediated brokerages

Country: United States
Taker fee: 200 bps
Typical gas: $0.15

§ Notes

USDC-settled on Polygon. Largest volume of any prediction-market venue on top events. Gamma API is public: general rate limit 4000 req/10s, /events 500/10s, /markets 300/10s, /public-search 350/10s (Cloudflare-enforced). Ingest via /events preferred — it indexes markets + tags + sports categories. In Feb 2026 Polymarket acquired Dome (unified prediction-market API YC startup), consolidating the cross-venue aggregation space.

§ Coverage

Markets ingested: 152581
Active: 14570
Delisted: 138011
Events linked: 163
Last ingest: 1d ago

§ Top events by volume

§ Schema health

Storm runs a canary against every venue that compares live API responses against the last-known schema shape. Drift, missing fields, and unexpected null-rates raise alarms routed to the operator queue.

§ Recent markets

Will 100 or more ships transit the Strait of Hormuz between June 15-June 21? 2525956 · $1.8k vol · first seen 1d ago
Portugal vs. Uzbekistan: O/U 3.5 2324012 · $1.8k vol · first seen 1d ago
Toronto Blue Jays vs. Boston Red Sox: O/U 11.5 2571693 · $1.8k vol · first seen 1d ago
Will the announcers say "Golden Boot" during the Canada vs Qatar FIFA World Cup Match? 2586307 · $1.8k vol · first seen 1d ago
Spread: England (-2.5) 2323996 · $1.8k vol · first seen 1d ago
Ghana vs. Panama: 2nd Half O/U 1.5 2497094 · $1.8k vol · first seen 1d ago
ITF Taipei: Thasaporn Naklo vs Yuki Naito 2583423 · $1.9k vol · first seen 1d ago
Will the highest temperature in Beijing be 33°C on June 19? 2575438 · $1.9k vol · first seen 1d ago
Atlanta Dream vs. Indiana Fever 2440665 · $1.9k vol · first seen 1d ago
Will the highest temperature in Ankara be 24°C on June 19? 2576915 · $1.9k vol · first seen 1d ago

§ Ingest cadence and policy

Storm ingests from this venue on the standard pull cadence (default hourly for the daemon; on-demand via storm markets pull polymarket). The ingester stores the raw payload alongside the normalized fields, so schema changes can be replayed without re-fetching.

Policy note: USDC-settled on Polygon. Largest volume of any prediction-market venue on top events. Gamma API is public: general rate limit 4000 req/10s, /events 500/10s, /markets 300/10s, /public-search 350/10s (Cloudflare-enforced). Ingest via /events preferred — it indexes markets + tags + sports categories. In Feb 2026 Polymarket acquired Dome (unified prediction-market API YC startup), consolidating the cross-venue aggregation space.