{ "openapi": "3.0.1", "info": { "title": "Kalshi Weather Index, Station Obs & Settlement Audit", "description": "Kalshi's minute temperature index for 13 cities, plus station observations (NWS, METAR), the NWS Daily Climate Report and a settlement-audit row per city-day for KXHIGH/KXLOW temperature markets. Public APIs, no login. 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Leave empty for all. Index mode: the ten index cities plus nyc, chicago, la-coastal (empty = the original ten). Stations and audit modes: any city below, each mapped to the station its KXHIGH/KXLOW market cites (e.g. Chicago = Midway, CLIMDW).", "items": { "type": "string", "enum": [ "miami", "dfw", "houston", "phl-delaware-valley", "puget-sound", "sf-bay", "greater-boston", "southeast-michigan", "kansas-city", "minneapolis-st-paul", "nyc", "chicago", "la-coastal", "austin", "denver", "atlanta", "washington-dc", "newark", "las-vegas", "new-orleans", "oklahoma-city", "phoenix", "san-diego", "san-antonio", "louisville", "trenton" ], "enumTitles": [ "Miami (KMIA)", "Dallas–Fort Worth (KDFW)", "Houston (KHOU Hobby)", "Philadelphia / Delaware Valley (KPHL)", "Seattle / Puget Sound (KSEA)", "San Francisco Bay (KSFO)", "Greater Boston (KBOS)", "Detroit / Southeast Michigan (KDTW, no market)", "Kansas City (KMCI, no market)", "Minneapolis–St. Paul (KMSP)", "New York City (KNYC Central Park)", "Chicago (KMDW Midway)", "Los Angeles coastal (KLAX)", "Austin (KAUS) – markets only", "Denver (KDEN) – markets only", "Atlanta (KATL) – markets only", "Washington DC (KDCA) – markets only", "Newark (KEWR) – markets only", "Las Vegas (KLAS) – markets only", "New Orleans (KMSY) – markets only", "Oklahoma City (KOKC) – markets only", "Phoenix (KPHX) – markets only", "San Diego (KSAN) – markets only", "San Antonio (KSAT) – markets only", "Louisville (KSDF) – markets only", "Trenton (KTTN) – markets only" ] } }, "stations": { "title": "Extra stations (any ICAO code)", "type": "array", "description": "Stations and audit modes only: METAR stations anywhere in the world by ICAO code, e.g. ZBAA (Beijing), EGLL (London Heathrow), LFPG (Paris), RJTT (Tokyo) — the stations Polymarket's global temperature markets resolve on. Observations, daily max/min and the METAR 24-hour group come from aviationweather.gov; no NWS climate report and no Kalshi join for these. Can be combined with Cities.", "items": { "type": "string" } }, "stationTimezone": { "title": "Time zone for extra stations", "type": "string", "description": "IANA zone (e.g. Asia/Shanghai) used to cut local days for the extra stations. Default: the solar offset from the station's longitude (Etc/GMT±h), which matches civil time to within an hour for most airports." }, "lastDays": { "title": "Trailing window (days) – stations and audit modes", "minimum": 1, "maximum": 30, "type": "integer", "description": "How many complete local days ending yesterday, per city. 1–30. Ignored when From/To are set (dates, YYYY-MM-DD; To may be today). The NWS Daily Climate Report is kept about 7 days, METAR 30 days, the Kalshi index about 7–10 days; older days get null in those columns.", "default": 1 }, "sources": { "title": "Observation sources – stations mode", "type": "array", "description": "Which observation rows to emit in stations mode. The daily row and audit mode always use METAR and the Daily Climate Report.", "items": { "type": "string", "enum": [ "nws", "metar" ], "enumTitles": [ "NWS api.weather.gov observations", "METAR (aviationweather.gov)" ] }, "default": [ "nws", "metar" ] }, "lastHours": { "title": "Trailing window (hours) – index mode", "minimum": 1, "maximum": 168, "type": "integer", "description": "How many hours back from now to pull, per city. 1–168. Ignored when from/to are set. 60 points per hour per city.", "default": 24 }, "from": { "title": "From (ISO time or unix ms)", "type": "string", "description": "Optional window start, e.g. 2026-09-01T00:00:00Z. Use with To." }, "to": { "title": "To (ISO time or unix ms)", "type": "string", "description": "Optional window end. Defaults to now." }, "detailed": { "title": "Per-station readings", "type": "boolean", "description": "Attach every member station's reading and quality-control disposition to each point (Kalshi's detailed=true). Larger rows, same price.", "default": false }, "maxItems": { "title": "Maximum points", "minimum": 1, "maximum": 500000, "type": "integer", "description": "Cost cap per run: index points in index mode, rows in stations and audit modes. 1,000 points = one city for about 17 hours.", "default": 20000 }, "archiveDatasetName": { "title": "Archive dataset name", "type": "string", "description": "Also append points to a named dataset in your account (e.g. kalshi-weather-index). 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