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: 148556
Active: 11437
Delisted: 137119
Events linked: 162
Last ingest: 3s 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

Set Handicap: Mertens (-1.5) vs Bartunkova (+1.5) 2557726 · $1.9k vol · first seen 30m ago
Dogecoin Up or Down - June 18, 1:15AM-1:30AM ET 2577108 · $0 vol · first seen 32m ago
Bitcoin Up or Down - June 18, 1:15AM-1:30AM ET 2577097 · $0 vol · first seen 32m ago
Bitcoin Up or Down - June 18, 1:25AM-1:30AM ET 2577121 · $5 vol · first seen 32m ago
BNB Up or Down - June 18, 1:25AM-1:30AM ET 2577117 · $0 vol · first seen 32m ago
Dogecoin Up or Down - June 18, 1:20AM-1:25AM ET 2577112 · $0 vol · first seen 32m ago
Bitcoin Up or Down - June 18, 1:20AM-1:25AM ET 2577113 · $0 vol · first seen 32m ago
Ethereum Up or Down - June 18, 1:20AM-1:25AM ET 2577110 · $0 vol · first seen 32m ago
XRP Up or Down - June 18, 1:20AM-1:25AM ET 2577111 · $0 vol · first seen 32m ago
BNB Up or Down - June 18, 1:20AM-1:25AM ET 2577116 · $0 vol · first seen 32m 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.