UV index from irradiance API

Computes the WHO UV Index from erythemally-weighted surface irradiance with exposure category and a Fitzpatrick skin-type burn-time estimate. Answers 'What UV index is 0.2 W/m2 erythemal?', 'How long until I burn at this UV?'.

Price$0.04per request

MethodPOST

Route/v1/climate/uv-index-irradiance

StatusLive

MIME typeapplication/json

Rate limit120/minute

Cache0s public

uv-indexuviirradiancewhosunburnfitzpatrickerythemalburn-time

API URLhttps://x402.hexl.dev/v1/climate/uv-index-irradiance

Integration docs

Example request

{
  "uvIrradianceWm2": 0.2,
  "skinType": 2
}

Example response

{
  "uvIndex": 8,
  "category": "Very High",
  "skinType": 2,
  "burnTimeMinutes": 20.8,
  "uvIrradianceWm2": 0.2,
  "interpretation": "UV Index 8 (Very High); unprotected burn in ~21 min for skin type 2.",
  "formula": "UVI = erythemal irradiance(W/m²)×40 (WHO); burn time = MED / erythemal irradiance"
}

Input schema

{
  "type": "object",
  "required": [
    "uvIrradianceWm2"
  ],
  "properties": {
    "uvIrradianceWm2": {
      "type": "number",
      "description": "Erythemal UV irradiance (W/m2)",
      "examples": [
        0.2
      ]
    },
    "skinType": {
      "type": "number",
      "description": "Fitzpatrick skin type 1-6 (default 2)",
      "examples": [
        2
      ]
    }
  }
}

Output schema

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