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API · /suspension-api

Suspension Tuning API

healthy 3,650 Subscribers

Vehicle-suspension maths as an API, computed locally and deterministically — the spring and frequency numbers a racer, tuner or chassis engineer sets a car up with. The wheel-rate endpoint converts a spring rate to the rate the wheel actually feels: wheel rate = spring rate × motion ratio², where the motion ratio is the spring's travel per unit of wheel travel — a 200 lb/in spring at a 0.7 motion ratio gives a 98 lb/in wheel rate, because the spring's leverage softens it. The frequency endpoint gives the ride (natural) frequency at a corner, f = (1/2π)·√(wheel rate × g ÷ corner sprung weight), the number that really sets the ride: luxury cars run about 0.5–1.2 Hz, sporty street 1.2–1.7, race cars 2 Hz and up. The spring-rate endpoint inverts it — the spring rate needed to hit a target frequency for a corner weight and motion ratio — so you can pick the frequency for the car's job and get the spring straight out. Everything is computed locally and deterministically, so it is instant and private. Ideal for motorsport and tuning apps, chassis-setup and corner-balancing tools, suspension-design calculators, and engineering study aids. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 compute endpoints. Estimates — real ride also depends on damping and tyres.

#suspension #motorsport #tuning #chassis #automotive #developer-tools
api.oanor.com/suspension-api
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Machine-readable spec so AI agents can integrate this API.

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

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

Suspension Tuning API — live data on the oanor API marketplace

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
68 ms
Server probes · 24h
Subscribers
3,650
active
Total calls
80
last 7 days
status Full status page → · 16 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 480 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 480 calls/month
  • 2 req/sec
  • Wheel rate + frequency + spring rate
  • No credit card
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Starter

€6.15 /month

  • 12,800 calls / month
  • 6 requests / second
  • Hard cap (429 above quota, no overage)
  • 12,800 calls/month
  • 6 req/sec
  • Motion ratio & ride frequency
  • Email support
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Pro

€18.70 /month

  • 82,000 calls / month
  • 15 requests / second
  • Hard cap (429 above quota, no overage)
  • 82,000 calls/month
  • 15 req/sec
  • Setup & corner-balance pipelines
  • Priority support
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Mega

€55.00 /month

  • 265,000 calls / month
  • 36 requests / second
  • Hard cap (429 above quota, no overage)
  • 265,000 calls/month
  • 36 req/sec
  • Platform scale
  • Dedicated SLA
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api.oanor.com/quartermile-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Suspension Tuning API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Suspension Tuning API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Suspension Tuning 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 Suspension Tuning API cost?
Suspension Tuning API has a free tier with 100 calls / month. Paid plans start at €6.15 / 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 Suspension Tuning API GDPR-compliant?
All requests to Suspension Tuning 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/suspension-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/suspension-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/suspension-api/SOME_PATH");
curl_setopt($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/suspension-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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