Economic order quantity
API · /inventory-api
Inventory Management API
healthy
3,606 Subscribers
Inventory-management maths as an API, computed locally and deterministically. The eoq endpoint computes the economic order quantity, EOQ = √(2·D·S/H) from the annual demand, the cost per order and the holding cost per unit per year — the order size that minimises total cost — and returns the number of orders per year, the days between orders and the annual ordering, holding and total costs (which are equal at the EOQ). The reorder endpoint computes the reorder point, daily demand × lead time + safety stock, the stock level at which to place the next order. The safety endpoint computes the safety stock for a target service level, Z × σ × √lead_time, where Z is the normal-distribution value for the service level (95 % gives 1.645) found by an exact inverse-normal calculation, so any service level works. Everything is computed locally and deterministically, so it is instant and private. Ideal for e-commerce, retail, warehouse and supply-chain app developers, stock-planning and procurement tools, and operations dashboards. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is inventory optimisation; for break-even and cost-volume-profit use a break-even API.
api.oanor.com/inventory-api
API health
healthy- Uptime
- 100.00%
- Server probes · 24h
- Avg latency
- 88 ms
- Server probes · 24h
- Subscribers
- 3,606
- active
- Total calls
- 36
- last 7 days
Pricing
Pick a tier — billed monthly, cancel anytime.
Free
Free
- 2,000 calls / month
- 2 requests / second
- Hard cap (429 above quota, no overage)
- EOQ economic order quantity endpoint
- Single-SKU reorder point
- Deterministic, instant results
- 2000 calls / month
Starter
€15.00 /month
- 40,000 calls / month
- 6 requests / second
- Hard cap (429 above quota, no overage)
- EOQ + reorder point + safety stock
- Total annual inventory cost breakdown
- Lead-time demand calculations
- 40k calls / month
Pro
€39.00 /month
- 250,000 calls / month
- 20 requests / second
- Hard cap (429 above quota, no overage)
- All Starter endpoints
- Multi-SKU batch optimization
- Service-level safety-stock (z-score)
- Carrying + ordering cost trade-off curves
- 250k calls / month
Mega
€119.00 /month
- 1,526,000 calls / month
- 60 requests / second
- Hard cap (429 above quota, no overage)
- All Pro endpoints
- High-volume ERP/WMS integration throughput
- Bulk reorder-point recalculation
- Priority support SLA
- 1.5M calls / month
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api.oanor.com/tankvolume-api
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api.oanor.com/osv-api
Frequently asked questions
Quick answers about pricing, quotas, and integration.
How do I get an API key for Inventory Management API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Inventory Management API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Inventory Management 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 Inventory Management API cost?
Inventory Management API has a free tier with 100 calls / month. Paid plans start at €15.00 / 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 Inventory Management API GDPR-compliant?
All requests to Inventory Management 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/inventory-api/SOME_PATH \
-H "x-oanor-key: oanor_test_..."const res = await fetch("https://api.oanor.com/inventory-api/SOME_PATH", {
headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();$ch = curl_init("https://api.oanor.com/inventory-api/SOME_PATH");
curl_setopt($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/inventory-api/SOME_PATH",
headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())Ratings
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