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API · /photometry-api

Photometry & Lighting API

healthy 3,220 Subscribers

Photometry and lighting maths as an API, computed locally and deterministically. The illuminance endpoint computes the light falling on a surface from a point source, E = I·cos(θ)/d² in lux, from the luminous intensity in candela, the distance in metres and the angle of incidence from the surface normal — a 1000 cd source straight down at 2 m gives 250 lux. The inverse-square endpoint scales a known illuminance to a new distance, E2 = E1·(d1/d2)², so doubling the distance quarters the light. The flux-intensity endpoint converts between luminous flux in lumens and luminous intensity in candela through the solid angle, I = Φ/Ω and Φ = I·Ω, with the solid angle taken as the full sphere 4π steradian for an isotropic source or, for a spotlight of full beam angle β, Ω = 2π·(1 − cos(β/2)) — so a 100 cd isotropic source emits about 1256.6 lm, and a 1000 cd lamp in a 30° beam emits about 214 lm. Distances are in metres and angles in degrees. Everything is computed locally and deterministically, so it is instant and private. Ideal for lighting-design, architecture, photography, film, horticulture-grow-light, stage and AV app developers, lux-and-lumen and luminaire-planning tools, and engineering software. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. These are photometric (perceived-light) quantities; for blackbody/peak-wavelength radiometry use a Wien/radiation API.

#photometry #lighting #lux #lumen #illuminance #developer-tools
api.oanor.com/photometry-api
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Machine-readable spec so AI agents can integrate this API.

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

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

Photometry & Lighting API — live data on the oanor API marketplace

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
77 ms
Server probes · 24h
Subscribers
3,220
active
Total calls
76
last 7 days
status Full status page → · 12 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 5,300 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 5,300 calls/month
  • 2 req/sec
  • Illuminance + inverse-square + flux/intensity
  • No credit card
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Starter

€5.40 /month

  • 53,000 calls / month
  • 6 requests / second
  • Hard cap (429 above quota, no overage)
  • 53,000 calls/month
  • 6 req/sec
  • Beam-angle solid angle, incidence angle
  • Email support
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Pro

€15.00 /month

  • 235,000 calls / month
  • 15 requests / second
  • Hard cap (429 above quota, no overage)
  • 235,000 calls/month
  • 15 req/sec
  • Luminaire-planning & AV pipelines
  • Priority support
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Mega

€47.00 /month

  • 1,330,000 calls / month
  • 40 requests / second
  • Hard cap (429 above quota, no overage)
  • 1,330,000 calls/month
  • 40 req/sec
  • Platform scale
  • Dedicated SLA
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Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Photometry & Lighting API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Photometry & Lighting API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Photometry & Lighting 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 Photometry & Lighting API cost?
Photometry & Lighting API has a free tier with 100 calls / month. Paid plans start at €5.40 / 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 Photometry & Lighting API GDPR-compliant?
All requests to Photometry & Lighting 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/photometry-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/photometry-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/photometry-api/SOME_PATH");
curl_setopt($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/photometry-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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