Polymarket

Live coverage of Polymarket via the ParlayAPI moneyline / spread / total / player-prop aggregator. Classification: Exchange / prediction market. Source key: polymarket.

Supported sports + markets (last 72h)

americanfootball_nfl (5 markets)

• futures_championship 1,577 rows
• polymarket_moneyline 1,368 rows
• futures_conference 373 rows
• polymarket_yesno 272 rows
• futures_mvp 179 rows

baseball_mlb (2 markets)

• polymarket_yesno 2,848 rows
• moneyline 325 rows

basketball_nba (3 markets)

• polymarket_yesno 1,488 rows
• futures_rookie_of_the_year 1,387 rows
• polymarket_moneyline 1,378 rows

basketball_wnba (1 markets)

• polymarket_yesno 143 rows

esports (1 markets)

• polymarket_yesno 80 rows

esports_cs2 (2 markets)

• polymarket_yesno 3,998 rows
• polymarket_moneyline 100 rows

esports_lol (1 markets)

• polymarket_yesno 214 rows

esports_valorant (1 markets)

• polymarket_yesno 29 rows

golf_other (1 markets)

• polymarket_yesno 78 rows

mma_mixed_martial_arts (1 markets)

• polymarket_yesno 8 rows

polymarket_active (2 markets)

• polymarket_moneyline 10,530 rows
• polymarket_yesno 10,528 rows

polymarket_politics (2 markets)

• polymarket_moneyline 7,614 rows
• polymarket_yesno 7,611 rows

polymarket_sports (1 markets)

• polymarket_yesno 11,496 rows

soccer_epl (2 markets)

• futures_championship 1,442 rows
• polymarket_moneyline 1,372 rows

soccer_other (1 markets)

• polymarket_yesno 3 rows

soccer_uefa_champs_league (1 markets)

• futures_championship 1,435 rows

How to query just this book

curl -s 'https://parlay-api.com/v1/sports/baseball_mlb/odds?regions=us&markets=h2h&bookmakers=polymarket' \
  -H "X-API-Key: $PARLAY_API_KEY"

How freshness is graded

We poll Polymarket on the Exchange / order book freshness tier, which means we expect a new observation within 10s under healthy operation. Observations between 10s and 30s are flagged "degraded". Between 30s and 120s we mark "breach" and page an operator. Beyond 120s the source is "stale" and we typically pause comparisons against it until it recovers.

These thresholds are measured on the book as a whole: they say how long we can go without any new price from Polymarket, and not how old the price on one particular game is. A source that walks its slate one event at a time refreshes any single market less often than the tier above. Measured on production 2026-07-31, Fliff wrote a price every 5.3s at the median book-wide while its median WNBA game went 169s between writes, both healthy. For the age of a specific price, read the last_update field on that row rather than this tier.

Full per-book threshold table at /v1/meta/per-book-sla. Live operator dashboard at /uptime. Historical hourly observation rate at /v1/historical/source-quality.csv?source=polymarket.

Related

← All sportsbooks · Cross-book coverage matrix · Operator uptime · Machine-readable parser coverage