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API · /dimweight-api

Dimensional Weight API

healthy 3,013 Subscribers

Shipping dimensional-weight maths as an API. Carriers bill the greater of a parcel's actual weight and its dimensional (volumetric) weight — the volume divided by a carrier "dim divisor" — so a big, light box can cost far more than the scales suggest. The dimweight endpoint computes the dimensional weight in both pounds and kilograms from the length, width and height (in inches or centimetres) and a dim divisor, which you can give directly or pick by carrier (UPS, FedEx, USPS, DHL, IATA). The billable endpoint takes the actual weight as well and returns the billable weight — the greater of actual and dimensional — telling you which one you will be charged on. The girth endpoint computes the girth (twice the width plus height of the two smaller sides), the length-plus-girth and the longest side, and flags whether the parcel is oversize against length limits (defaulting to typical US ground values). Everything is computed locally and deterministically, so it is instant and private. Ideal for e-commerce checkout and shipping estimators, fulfilment and warehouse tools, freight and logistics software, and packaging optimisation. Pure local computation — no key, no third-party service, instant. Live, nothing stored. Divisors and limits are typical published values — confirm with your carrier and service. 3 endpoints. This is dimensional-weight maths; for live shipping rates use a carrier's own API, and for plain unit conversion use a unit-conversion API.

#dimensional-weight #shipping #volumetric #logistics #ecommerce #developer-tools
api.oanor.com/dimweight-api
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Machine-readable spec so AI agents can integrate this API.

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

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

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
84 ms
Server probes · 24h
Subscribers
3,013
active
Total calls
72
last 7 days
status Full status page → · 8 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 9,435 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 9,435 calls/month
  • 2 req/sec
  • Dim weight + billable + girth
  • No credit card
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Starter

€10.95 /month

  • 19,050 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 19.05k calls/month
  • 8 req/sec
  • Carrier presets (UPS/FedEx/…)
  • Email support
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Pro

€30.85 /month

  • 240,500 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • 240.5k calls/month
  • 20 req/sec
  • E-commerce / fulfilment pipelines
  • Priority support
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Mega

€68.85 /month

  • 1,245,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 1.245M calls/month
  • 50 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 Dimensional Weight API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Dimensional Weight API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Dimensional Weight 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 Dimensional Weight API cost?
Dimensional Weight API has a free tier with 100 calls / month. Paid plans start at €10.95 / 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 Dimensional Weight API GDPR-compliant?
All requests to Dimensional Weight 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/dimweight-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/dimweight-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/dimweight-api/SOME_PATH");
curl_setopt($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/dimweight-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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