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API · /wbgt-api

WBGT Heat Stress API

healthy 3,101 Subscribers

Wet Bulb Globe Temperature (WBGT) heat-stress index as an API, computed locally and deterministically. WBGT is the standard occupational and athletic heat-stress measure (ISO 7243). The wbgt endpoint computes the true index from measured thermometer readings: outdoors in the sun WBGT = 0.7·Tnwb + 0.2·Tg + 0.1·Tdb, and indoors or in the shade WBGT = 0.7·Tnwb + 0.3·Tg, from the natural wet-bulb, globe and dry-bulb temperatures, and returns the heat-stress flag and work-rest and hydration guidance. The estimate endpoint gives an approximate shade WBGT from just the air temperature and relative humidity using the Bureau of Meteorology approximation — e = (rh/100)·6.105·exp(17.27·T/(237.7+T)); WBGT ≈ 0.567·T + 0.393·e + 3.94 — for when you do not have a globe or wet-bulb thermometer. The flag endpoint classifies any WBGT value (°C or °F) into a heat-stress category — green, yellow, red or black — with the recommended work-rest cycle and water intake. Everything is computed locally and deterministically, so it is instant and private. Ideal for occupational-safety and industrial-hygiene tools, sports, military and outdoor-event planning, and environmental-monitoring apps. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is the WBGT heat-stress index; for the NWS heat index, wind chill and dew point use a weather-formulas API.

#wbgt #heat-stress #occupational-safety #meteorology #sports #developer-tools
api.oanor.com/wbgt-api
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Machine-readable spec so AI agents can integrate this API.

/api/wbgt-api/openapi.json
/api/wbgt-api/llms.txt

Discovery: GET /api/index.json lists every API.

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
96 ms
Server probes · 24h
Subscribers
3,101
active
Total calls
32
last 7 days
status Full status page → · 20 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 2,000 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • ISO 7243 WBGT index from temp, humidity, wind, solar
  • Indoor and outdoor WBGT formulas
  • Celsius and Fahrenheit output
  • 2,000 calls/month for evaluation
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Starter

€9.00 /month

  • 30,000 calls / month
  • 5 requests / second
  • Hard cap (429 above quota, no overage)
  • Full WBGT with globe and natural wet-bulb estimation
  • OSHA / ISO work-rest cycle category flags
  • Batch endpoint for multiple readings
  • 30,000 calls/month
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Pro

€24.00 /month

  • 200,000 calls / month
  • 15 requests / second
  • Hard cap (429 above quota, no overage)
  • Heat-stress risk zones (white/green/yellow/red/black flag)
  • Athlete and worker acclimatization thresholds
  • Solar-load and clothing-adjustment factors
  • 200,000 calls/month with priority compute
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Mega

€79.00 /month

  • 1,500,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • High-volume WBGT for fleet/sensor networks
  • Full ISO 7243 + NWS + military WBGT models
  • Bulk array processing per request
  • 1,500,000 calls/month, 50 rps burst
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Related APIs

Other APIs with overlapping tags.

Beaufort Wind Scale API

The Beaufort wind scale as an API, computed locally and deterministically. The classify endpoint turns a measured wind speed — in metres per second, kilometres per hour, knots, miles per hour or feet per second — into its Beaufort force (0 calm to 12 hurricane), with the descriptive name (light breeze, gale, storm …), the corresponding sea state and the mean open-sea wave height, plus the speed expressed in every unit. The force endpoint looks up a Beaufort number and returns its wind-speed range in all units, its description, sea condition and wave height. The convert endpoint converts a wind speed across metres per second, kilometres per hour, knots, miles per hour and feet per second and reports the matching Beaufort force (1 knot = 0.514444 m/s). Speeds use the standard 10-metre reference height and wave heights are open-sea means. Everything is computed locally and deterministically, so it is instant and private. Ideal for sailing, marine, aviation, drone, weather and outdoor app developers, wind-warning and sea-state tools, and meteorology education. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is the Beaufort wind scale; for the feels-like wind chill use a feels-like API and for live wind observations a weather data API.

api.oanor.com/beaufort-api

Feels-Like Temperature API

Feels-like (apparent) temperature meteorology as an API, computed locally and deterministically. The wind-chill endpoint computes how cold the air feels when wind carries body heat away, using the Environment Canada formula WC = 13.12 + 0.6215·T − 11.37·V^0.16 + 0.3965·T·V^0.16 from the air temperature (°C) and wind speed (km/h), valid at 10 °C or below with wind of at least 4.8 km/h. The heat-index endpoint computes how hot it feels in warm, humid air with the US National Weather Service Rothfusz regression from temperature and relative humidity, since high humidity slows sweat evaporation, with the low-/high-humidity adjustments. The apparent-temperature endpoint computes the Australian Bureau of Meteorology apparent temperature, AT = Ta + 0.33·e − 0.70·ws − 4.00, which combines the warming effect of humidity (through the vapour pressure e) and the cooling effect of wind (ws in m/s) in a single feels-like value. Temperatures are in °C (Fahrenheit also returned), humidity in %, wind in km/h for wind chill and m/s for apparent temperature. Everything is computed locally and deterministically, so it is instant and private. Ideal for weather, outdoor-activity, sports, smart-home and wearable app developers, comfort and safety tools, and meteorology education. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is the feels-like temperature calculator; for the occupational WBGT heat-stress index use a WBGT API and for live weather observations a weather data API.

api.oanor.com/feelslike-api

Standard Atmosphere API

International Standard Atmosphere (ISA) maths as an API, computed locally and deterministically. The properties endpoint gives the air temperature, pressure, density and speed of sound at any altitude from sea level to 20 km — using the standard troposphere lapse rate (T = T0 − 0.0065·h) and the isothermal lower stratosphere above 11 km — along with the density, pressure and temperature ratios relative to sea level. The density-altitude endpoint computes the density altitude — the ISA altitude with the same air density — from a pressure altitude and the actual outside-air temperature, the figure pilots use because heat and low pressure rob an aircraft of lift, engine power and propeller thrust; it also reports the ISA temperature deviation. The pressure-altitude endpoint turns a barometric reading (in hectopascals or pascals) into the pressure altitude, the ISA altitude at which the standard pressure equals your reading. Altitudes accept metres or feet, temperature °C or kelvin. Everything is computed locally and deterministically, so it is instant and private. Ideal for aviation, drone, ballooning, HVAC and meteorology app developers, flight-planning and performance tools, and physics education. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is the ISA atmospheric model; for the acoustic and relativistic Doppler effect use a Doppler API.

api.oanor.com/atmosphere-api

Coriolis & Centrifugal API

Coriolis and centrifugal forces in a rotating frame as an API, computed locally and deterministically. The coriolis endpoint computes the Coriolis acceleration a = 2·Ω·v·sin(θ) and, given a mass, the Coriolis force F = m·a, for an object moving at a speed in a frame rotating at a given rate — supplied directly in radians per second, as rpm, or as planet=earth (Ω = 7.2921×10⁻⁵ rad/s) — with the angle taken as the latitude for motion over the Earth or an explicit angle to the rotation axis. The centrifugal endpoint computes the centrifugal acceleration a = ω²·r = v²/r and force from a radius and an angular speed (rad/s, rpm or a tangential velocity), and reports the g-force, handy for centrifuges, rotating machinery and amusement rides. The earth endpoint gives the rotation effects at a latitude: the Coriolis parameter f = 2·Ω·sin(lat), the inertial-oscillation period 2π/|f|, the eastward speed of the Earth's surface, the centrifugal acceleration, and which way moving objects are deflected (right in the Northern Hemisphere, left in the Southern). Everything is computed locally and deterministically, so it is instant and private. Ideal for meteorology, oceanography and geophysics tools, centrifuge and rotating-machinery design, ballistics and physics-education apps. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is rotating-frame dynamics; for projectile and SUVAT kinematics use a physics API and for banked-curve cornering use a banked-curve API.

api.oanor.com/coriolis-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for WBGT Heat Stress API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call WBGT Heat Stress API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for WBGT Heat Stress API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does WBGT Heat Stress API cost?
WBGT Heat Stress API has a free tier with 100 calls / month. Paid plans start at €9.00 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is WBGT Heat Stress API GDPR-compliant?
All requests to WBGT Heat Stress API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Pick an endpoint from the list on the left to see its details and try it.

Code snippets

Sign up to get an API key, then call any path under your slug.

curl https://api.oanor.com/wbgt-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/wbgt-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/wbgt-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);
import requests
r = requests.get(
    "https://api.oanor.com/wbgt-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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