Endurance & still-air range API

Computes flight endurance from usable fuel and burn rate, plus still-air range at an optional ground speed. Answers 'How long can I stay airborne on 40 gallons at 10/hr?', 'What still-air range does my fuel give at 120 kt?'.

Price$0.02per request

MethodPOST

Route/v1/nav/endurance

StatusLive

MIME typeapplication/json

Rate limit120/minute

Cache0s public

aviationendurancerangefuelburn-rateflight-timeplanningmarine

API URLhttps://x402.hexl.dev/v1/nav/endurance

Integration docs

Example request

{
  "usableFuelUnits": 40,
  "burnRatePerHour": 10,
  "groundSpeedKt": 120
}

Example response

{
  "enduranceHr": 4,
  "enduranceHoursMinutes": "4h 0m",
  "stillAirRangeNm": 480,
  "interpretation": "Endurance 4h 0m, range 480 nm."
}

Input schema

{
  "type": "object",
  "required": [
    "usableFuelUnits",
    "burnRatePerHour"
  ],
  "properties": {
    "usableFuelUnits": {
      "type": "number",
      "examples": [
        40
      ]
    },
    "burnRatePerHour": {
      "type": "number",
      "examples": [
        10
      ]
    },
    "groundSpeedKt": {
      "type": "number",
      "examples": [
        120
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}