{"uid":"cap__67G-SuCTdI44Ko_oZc69","slug":"eckari-us-weather-observation-6f9f0967","name":"Eckari US Weather Observation","description":"Latest surface observation from the nearest National Weather Service station to a US coordinate, with the station identity, the observation time (observed_at), its age in seconds and an is_stale flag. Station observations are reported roughly every 20-60 minutes, so this is the most recent measurement, not a real-time reading. Readings that fail the station's quality control are returned as null. Use when: What was the most recently observed temperature at these US coordinates?","url":"https://api.eckari.com/v1/weather/us/observation?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":["lat","lon"],"properties":{"lat":{"type":"number","maximum":90,"minimum":-90,"description":"Latitude in decimal degrees (WGS84). Rounded to 4 decimal places before the National Weather Service lookup."},"lon":{"type":"number","maximum":180,"minimum":-180,"description":"Longitude in decimal degrees (WGS84). Rounded to 4 decimal places before the National Weather Service lookup."}},"additionalProperties":false}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"data":{"station":{"id":"KDCA","name":"Washington/Reagan National Airport, DC","distance_km":5.49},"is_stale":false,"dewpoint_c":22,"age_seconds":1451,"observed_at":"2026-08-18T11:40:00.000Z","cloud_layers":[{"amount":{"code":"SCT","description":"scattered (3-4 oktas)"},"base_m":3352.8}],"visibility_m":16093.44,"temperature_c":25,"temperature_f":77,"wind_gust_kmh":null,"wind_speed_kmh":12.96,"text_description":"Partly Cloudy","wind_direction_deg":340,"relative_humidity_pct":83.45,"barometric_pressure_hpa":1011.85,"precipitation_last_hour_mm":null},"meta":{"source":"nws","version":"2.1.0","freshness":"near_live","capability":"weather.us.observation"}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_KdBxpciCLshafNlggQDC-","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the latest surface observation from the nearest National Weather Service station to a given US lat/lon coordinate, including temperature, humidity, wind, pressure, and station metadata.","exampleAgentPrompt":"What's the most recent weather observation from the nearest NWS station to latitude 38.8977 and longitude -77.0365? I want the temperature, humidity, wind, and how old the reading is.","exampleUseCases":[{"title":"Real-time site temperature check","prompt":"What's the current observed temperature and wind conditions at the job site near latitude 40.7128, longitude -74.0060 in New York? I need the most recent NWS station reading and how fresh it is."},{"title":"Weather condition audit for logistics","prompt":"Before dispatching the delivery truck, can you pull the latest surface weather observation for the warehouse coordinates at lat 33.749, lon -84.388 in Atlanta? I need wind speed, visibility, and whether the data is stale."},{"title":"Outdoor event weather briefing","prompt":"We're hosting an outdoor event near lat 37.7749, lon -122.4194 in San Francisco — what does the nearest weather station say right now about temperature, humidity, and cloud cover?"}],"resultDescription":"A JSON object containing the nearest NWS station's identity (id, name, distance in km), the latest observation timestamp, observation age in seconds, an is_stale boolean, and measured values including temperature in Celsius and Fahrenheit, dew point, relative humidity, wind speed and direction, wind gusts, barometric pressure, visibility, cloud layers with coverage codes, precipitation in the last hour, and a text description of conditions. Also includes metadata about the data source and API version.","failureModes":["Coordinates outside the US (no NWS coverage) may return no station or an error","Station has not reported recently — is_stale flag will be true and age_seconds will be large","Individual readings (e.g. precipitation, wind gust) may be null if they failed station QC","Invalid lat/lon values outside -90/90 or -180/180 will be rejected by schema validation","Remote or sparsely monitored areas may have nearest stations tens of kilometers away, reducing relevance"],"whenToPreferThis":"Choose this endpoint when you need the most recent actual measured weather conditions at a specific US coordinate from official NWS instrumentation. It is ideal for ground-truth spot checks, logistics and field operations, or any use case requiring observed (not forecast) data with station provenance and freshness metadata. Prefer this over forecast APIs when you want what the atmosphere was actually doing at a recent timestamp, not a model prediction.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T12:41:32.459Z","isFirstParty":false,"canonicalSlug":"eckari-us-weather-observation-6f9f0967"}