Compare options, find best value
API · /unitprice-api
Unit Price API
healthy
3,777 Subscribers
Unit-price and best-value maths as an API — the supermarket "which is cheaper" calculation, computed locally and deterministically and entirely currency-agnostic. The unit endpoint normalises a pack price to a price per standard unit: from a price, a pack size and its unit (and an optional multipack count) it returns the price per kilogram, per 100 g and per pound for weight; per litre, per 100 ml and per fluid ounce for volume; or per item for counted goods — plus the price per pack item for multipacks. The compare endpoint takes several pack options as a simple list (such as "3@500g,5@1kg,4.5@750g"), ranks them cheapest-per-unit first, names the best value and reports the percentage saving versus the most expensive. The convert endpoint turns a unit price given in one basis (for example per pound) into the other bases for its measure. Everything is computed locally and deterministically, so it is instant and private. Options being compared must share a measure (all weight, all volume or all count). Ideal for shopping and grocery apps, price-comparison and deal sites, budgeting tools, and retail and procurement software. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is unit-price comparison; for profit margin and markup use a margin API.
api.oanor.com/unitprice-api
API health
healthy- Uptime
- 100.00%
- Server probes · 24h
- Avg latency
- 72 ms
- Server probes · 24h
- Subscribers
- 3,777
- active
- Total calls
- 76
- last 7 days
Pricing
Pick a tier — billed monthly, cancel anytime.
Free
Free
- 10,735 calls / month
- 2 requests / second
- Hard cap (429 above quota, no overage)
- 10,735 calls/month
- 2 req/sec
- Unit + compare + convert
- No credit card
Starter
€12.25 /month
- 20,350 calls / month
- 8 requests / second
- Hard cap (429 above quota, no overage)
- 20.35k calls/month
- 8 req/sec
- Multipacks + best-value ranking
- Email support
Pro
€32.15 /month
- 253,500 calls / month
- 20 requests / second
- Hard cap (429 above quota, no overage)
- 253.5k calls/month
- 20 req/sec
- Shopping / price-comparison pipelines
- Priority support
Mega
€70.15 /month
- 1,310,000 calls / month
- 50 requests / second
- Hard cap (429 above quota, no overage)
- 1.31M calls/month
- 50 req/sec
- Platform scale
- Dedicated SLA
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api.oanor.com/proglang-api
Frequently asked questions
Quick answers about pricing, quotas, and integration.
How do I get an API key for Unit Price API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Unit Price API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Unit Price 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 Unit Price API cost?
Unit Price API has a free tier with 100 calls / month. Paid plans start at €12.25 / 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 Unit Price API GDPR-compliant?
All requests to Unit Price 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/unitprice-api/SOME_PATH \
-H "x-oanor-key: oanor_test_..."const res = await fetch("https://api.oanor.com/unitprice-api/SOME_PATH", {
headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();$ch = curl_init("https://api.oanor.com/unitprice-api/SOME_PATH");
curl_setopt($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/unitprice-api/SOME_PATH",
headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())Ratings
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