{ "openapi": "3.0.1", "info": { "title": "Polymarket Weather Markets API — Daily Temperature Odds", "description": "Live odds for every Polymarket daily high and low temperature market in 51 cities, bracket by bracket: bid/ask, implied probability, volume, the exact settlement station (ICAO), unit and results, plus the running METAR high/low at that station. No login, no API key. 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Case, accents and extra spaces are ignored. Use \"all\" for every city (51 as of Sep 2026, about 2,800-3,200 live brackets, about $2.90-3.30 per run). Unknown names are skipped with a free notice row listing valid cities. Default: NYC.", "default": [ "NYC" ], "items": { "type": "string" } }, "metric": { "title": "Metric", "enum": [ "both", "high", "low" ], "type": "string", "description": "high = 'Highest temperature in on ?' markets, low = 'Lowest temperature ...' markets, both = both.", "default": "both" }, "mode": { "title": "Mode", "enum": [ "live", "settled", "both" ], "type": "string", "description": "live = markets still open (usually today plus 1-2 days ahead) with the live order book. settled = closed markets with the winning bracket, for the lookback window or dateFrom/dateTo (about 1,100 brackets per day for all cities). both = live then settled.", "default": "live" }, "lookbackDays": { "title": "Lookback days (settled mode)", "type": "integer", "description": "Settled/both mode only, when dateFrom/dateTo are empty: how many days back from today to pull closed markets. 1-120 (out-of-range values are clamped). Cost hint: all cities = about 1,100 brackets (~$1.10) per day; one city = about 22 brackets per day.", "default": 7 }, "dateFrom": { "title": "Date from (optional)", "type": "string", "description": "Earliest event date (station-local calendar day). YYYY-MM-DD, today, tomorrow, yesterday or +/-Nd (e.g. -3d). Filters live and settled rows." }, "dateTo": { "title": "Date to (optional)", "type": "string", "description": "Latest event date, same formats as dateFrom. Set dateFrom = dateTo for a single day." }, "includeObservation": { "title": "Include METAR running high/low proxy", "type": "boolean", "description": "For unresolved markets whose local day has started, fetch METAR observations at the exact settlement station and add the running high/low plus a per-bracket status (dead / leading / alive / final_proxy_win / final_proxy_loss). Also adds one station_observation row per station-day ($0.002 each). Proxy only, not the official value. Not available for Hong Kong (HKO) or Jinan.", "default": true }, "liveOrderBook": { "title": "Refresh prices from the live order book", "type": "boolean", "description": "Read best bid/ask, sizes and last trade from Polymarket's live CLOB order book (a few extra fast requests). Off = Gamma catalog prices, which can be up to 5 minutes old.", "default": true }, "maxRecords": { "title": "Max market records", "type": "integer", "description": "Upper limit on charged market rows per run (1-100000, default 5000; 0 = no cap, i.e. 100000). Free notice rows do not count. 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