Polymarket

§ 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

5901

Active

5006

Delisted

895

Events linked

73

Last ingest

13m ago

§ Top events by volume

• 2028 Democratic Presidential Nomination Winner US Elections $49.64M
• 2028 Democratic Presidential Nomination Winner US Elections $47.89M
• 2028 Democratic presidential nominee US Elections $45.14M
• 2028 Democratic presidential nominee US Elections $45.11M
• 2028 Democratic Presidential Nomination Winner US Elections $40.87M
• 2028 US Presidential Election Winner US Elections $40.68M
• 2028 Democratic Presidential Nomination Winner US Elections $40.12M
• 2028 Democratic Presidential Nomination Winner US Elections $39.77M
• 2028 Democratic presidential nominee US Elections $39.37M
• 2028 Republican presidential nominee US Elections $39.03M
• 2028 Democratic presidential nominee US Elections $38.65M
• 2028 Democratic presidential nominee US Elections $38.46M
• 2028 Democratic Presidential Nomination Winner US Elections $37.18M
• 2028 Democratic Presidential Nomination Winner US Elections $35.48M
• 2028 US Presidential Election Winner US Elections $32.68M
• 2028 US Presidential Election Winner US Elections $32.31M
• 2028 Republican presidential nominee US Elections $32.29M
• 2028 Republican presidential nominee US Elections $32.26M
• 2028 Democratic presidential nominee US Elections $31.06M
• 2028 Democratic presidential nominee US Elections $30.96M

§ 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 the highest temperature in Shenzhen be 25°C or higher on April 30? 2102411 · $34.6k vol · first seen 16m ago
• Spread: Celtics (-6.5) 2116790 · $14.2k vol · first seen 16m ago
• Counter-Strike: 9INE vs BET-M 33 - Map 1 Winner 2101280 · $18.4k vol · first seen 21m ago
• Bitcoin Up or Down - April 30, 6:00AM-6:15AM ET 2114291 · $24.6k vol · first seen 21m ago
• Set Handicap: Ruud (-1.5) vs Blockx (+1.5) 2117634 · $13.6k vol · first seen 21m ago
• Dota 2: DOGSENT vs MODUS - Game 1 Winner 2115869 · $15.1k vol · first seen 25m ago
• Spread: Celtics (-5.5) 2111582 · $582.7k vol · first seen 25m ago
• Bitcoin Up or Down - April 30, 5:55AM-6:00AM ET 2114286 · $55.3k vol · first seen 25m ago
• LoL: ThunderTalk Gaming vs LGD Gaming - Game 2 Winner 2053133 · $130.1k vol · first seen 27m ago
• T20 Series Bangladesh vs Sri Lanka, Women: Bangladesh vs Sri Lanka 2089271 · $17.8k vol · first seen 27m 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.