Scale convert real ↔ model
API · /scalemodel-api
Scale Model API
healthy
3,519 Subscribers
Scale-model maths as an API, computed locally and deterministically — the real-to-model conversions a modeller, model-railroader, wargamer or diorama-builder works in. The convert endpoint scales a dimension either way at any scale, given as a ratio (1:35), a number (87.1) or a name (Z, N, TT, HO, OO, S, O, G, 1/72, 1/48, 1/35, 1/24, 1/64, 1/43, 1/18): real → model divides by the ratio, model → real multiplies, so a 1:35 tank 6 metres long becomes 171 mm and an HO (1:87.1) boxcar 12.2 metres long becomes 140 mm, with the answer in mm, cm, m, inches and feet. The identify endpoint finds the scale from a real measurement and the model of it — scale = real ÷ model — and names the nearest standard scale with how far off it is, so you know whether figures and accessories will match. The scales endpoint lists the common named scales and compares any two, telling you that a 1:35 model is about 2.06 times the size of the same subject at 1:72. Everything is computed locally and deterministically, so it is instant and private. Ideal for scale-modelling, model-railroad, wargaming, diecast, architecture and diorama app developers, conversion and shopping tools, and hobby software. Pure local computation — no key, no third-party service, instant. Length in mm/cm/m/in/ft. Live, nothing stored. 3 compute endpoints. For typographic modular scales use a different API.
api.oanor.com/scalemodel-api
API health
healthy- Uptime
- 100.00%
- Server probes · 24h
- Avg latency
- 78 ms
- Server probes · 24h
- Subscribers
- 3,519
- active
- Total calls
- 76
- last 7 days
Pricing
Pick a tier — billed monthly, cancel anytime.
Free
Free
- 7,550 calls / month
- 2 requests / second
- Hard cap (429 above quota, no overage)
- 7,550 calls/month
- 2 req/sec
- Convert + identify + scale reference
- No credit card
Starter
€4.06 /month
- 58,800 calls / month
- 6 requests / second
- Hard cap (429 above quota, no overage)
- 58,800 calls/month
- 6 req/sec
- Named scales, mm/cm/m/in/ft, comparison
- Email support
Pro
€11.42 /month
- 236,500 calls / month
- 15 requests / second
- Hard cap (429 above quota, no overage)
- 236,500 calls/month
- 15 req/sec
- Conversion & shopping-tool pipelines
- Priority support
Mega
€36.30 /month
- 1,362,000 calls / month
- 40 requests / second
- Hard cap (429 above quota, no overage)
- 1,362,000 calls/month
- 40 req/sec
- Platform scale
- Dedicated SLA
Built by
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api.oanor.com/mimetypes-api
Frequently asked questions
Quick answers about pricing, quotas, and integration.
How do I get an API key for Scale Model API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Scale Model API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Scale Model 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 Scale Model API cost?
Scale Model API has a free tier with 100 calls / month. Paid plans start at €4.06 / 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 Scale Model API GDPR-compliant?
All requests to Scale Model 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/scalemodel-api/SOME_PATH \
-H "x-oanor-key: oanor_test_..."const res = await fetch("https://api.oanor.com/scalemodel-api/SOME_PATH", {
headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();$ch = curl_init("https://api.oanor.com/scalemodel-api/SOME_PATH");
curl_setopt($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/scalemodel-api/SOME_PATH",
headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())Ratings
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