{"uid":"cap_KsuKdUZLTVWSJ3H65FZRn","slug":"aviation-weather-density-altitude-1dc05024","name":"Aviation Weather Density Altitude","description":"Density altitude at an airport from live temperature and pressure: performance penalty for aircraft and drones.","url":"https://aviation-weather.x402tookit.com/density-altitude?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"],"type":"string"},"queryParams":{"type":"object","required":["icao"],"properties":{"icao":{"type":"string","description":"4-letter ICAO airport code"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"asOf":{"type":["null","string"]},"icao":{"type":["null","string"]},"tempC":{"type":["null","number"]},"source":{"type":["null","string"]},"reasons":{"type":["array","null"],"items":{"type":"string"}},"summary":{"type":["null","string"]},"verdict":{"type":["null","string"]},"degraded":{"type":["boolean","null"]},"isaTempC":{"type":["null","number"]},"observed":{"type":["null","string"]},"sourceUrl":{"type":["null","string"]},"ageMinutes":{"type":["null","number"]},"disclaimer":{"type":["null","string"]},"notChecked":{"type":["array","null"],"items":{"type":"string"}},"thresholds":{"type":["null","object"],"properties":{"highFt":{"type":["null","number"]},"veryHighFt":{"type":["null","number"]}}},"altimeterHpa":{"type":["null","number"]},"fieldElevationFt":{"type":["null","number"]},"densityAltitudeFt":{"type":["null","number"]},"pressureAltitudeFt":{"type":["null","number"]}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_GEYVPSVEkFPsRYRaMJdsR","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns density altitude, pressure altitude, and temperature data for an airport using live weather, quantifying the performance penalty for aircraft and drones.","exampleAgentPrompt":"What's the current density altitude at KDEN? I want to know how much of a performance hit my aircraft will take before I attempt a departure today.","exampleUseCases":[{"title":"High-altitude airport departure check","prompt":"I'm flying out of Aspen (KASE) this afternoon — what's the density altitude right now and is it dangerously high for a light aircraft departure?"},{"title":"Hot-day drone flight planning","prompt":"Before I launch my drone at KBUR today, can you check the density altitude and tell me if the heat is going to hurt its hover performance?"},{"title":"Summer mountain flight safety briefing","prompt":"We're planning a flight out of KGTU this morning — pull the density altitude and let me know the performance verdict so we can decide if we need to reduce our load."}],"resultDescription":"Returns the computed density altitude in feet, pressure altitude in feet, current temperature and ISA standard temperature, altimeter setting, field elevation, a human-readable summary, a performance verdict (e.g. normal/high/very high), degraded-data flags, data source URL and age in minutes, and configurable thresholds for high and very-high density altitude warnings.","failureModes":["Invalid or unknown ICAO code returns an error or null fields","Live weather data unavailable for remote airports may result in degraded=true with partial results","Stale METAR data indicated by high ageMinutes value","Missing altimeter or temperature readings prevent accurate density altitude calculation","Network timeout or payment failure returns no data"],"whenToPreferThis":"Choose this endpoint when you need a computed density altitude value (not just raw METAR data) along with a plain-language performance verdict, especially for high-elevation or high-temperature airports where density altitude is a safety-critical concern. It is preferable over raw weather endpoints when you need the ISA deviation, pressure altitude, and a ready-made assessment of whether conditions are safe for aircraft or drone operations — without performing the calculation yourself.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T13:11:24.077Z","isFirstParty":false,"canonicalSlug":"aviation-weather-density-altitude-1dc05024"}