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 (4 markets)

• polymarket_yesno 132 rows
• futures_championship 121 rows
• polymarket_moneyline 114 rows
• futures_conference 12 rows

baseball_mlb (4 markets)

• polymarket_yesno 123 rows
• polymarket_moneyline 107 rows
• moneyline 25 rows
• futures_championship 22 rows

basketball_nba (3 markets)

• polymarket_yesno 112 rows
• polymarket_moneyline 20 rows
• futures_rookie_of_the_year 20 rows

esports (1 markets)

• polymarket_yesno 32 rows

esports_lol (1 markets)

• polymarket_yesno 71 rows

mma_mixed_martial_arts (1 markets)

• polymarket_yesno 20 rows

polymarket_active (2 markets)

• polymarket_moneyline 1,204 rows
• polymarket_yesno 1,204 rows

polymarket_politics (2 markets)

• polymarket_yesno 822 rows
• polymarket_moneyline 822 rows

polymarket_sports (1 markets)

• polymarket_yesno 1,352 rows

soccer_epl (2 markets)

• futures_championship 112 rows
• polymarket_yesno 5 rows

soccer_uefa_champs_league (1 markets)

• futures_championship 20 rows

tennis_other (1 markets)

• polymarket_yesno 117 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