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API · /breakeven-api

Break-Even Calculator API

healthy 3,686 Subscribers

Break-even and cost-volume-profit maths as an API, computed locally and deterministically. The breakeven endpoint computes the break-even point of a product — the units you must sell to cover all costs, fixed costs ÷ (price − variable cost) — together with the break-even revenue, the contribution margin per unit and the contribution-margin ratio. The target endpoint computes the units and revenue needed to reach a target profit, (fixed costs + target profit) ÷ contribution margin. The margin-of-safety endpoint takes an actual sales level (in units or revenue) and returns the margin of safety — how far sales can fall before a loss — both in units and as a percentage, plus the profit at that level. Everything is computed locally and deterministically, so it is instant and private. Ideal for business, startup and finance app developers, pricing and product-planning tools, and small-business and accounting dashboards. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is cost-volume-profit analysis; for per-unit margin and markup pricing use a margin API.

#break-even #cost-volume-profit #business #finance #pricing #developer-tools
api.oanor.com/breakeven-api
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Machine-readable spec so AI agents can integrate this API.

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

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

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
92 ms
Server probes · 24h
Subscribers
3,686
active
Total calls
40
last 7 days
status Full status page → · 12 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 2,000 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • Break-even point in units and revenue
  • Single-product CVP calculations
  • Deterministic, instant local compute
  • 2 requests/sec
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Starter

€14.00 /month

  • 30,000 calls / month
  • 6 requests / second
  • Hard cap (429 above quota, no overage)
  • Break-even + contribution-margin maths
  • Target-profit and margin-of-safety outputs
  • Fixed and variable cost modelling
  • Email support
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Pro

€39.00 /month

  • 200,000 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • Multi-product / weighted CVP analysis
  • What-if scenario and sensitivity inputs
  • Batch break-even computations
  • Priority support
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Mega

€119.00 /month

  • 1,500,000 calls / month
  • 60 requests / second
  • Hard cap (429 above quota, no overage)
  • High-volume embedded pricing-engine usage
  • Full CVP suite with degree-of-operating-leverage
  • Highest throughput at 60 rps
  • SLA-backed priority support
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CAGR & Returns API

Investment growth and return maths as an API, computed locally and deterministically. The cagr endpoint computes the compound annual growth rate, CAGR = (end/begin)^(1/years) − 1 — the single smoothed annual rate that compounds a starting value into an ending value — together with the total return and the growth multiple, so €1,000 growing to €2,000 over five years works out to about 14.87 %/yr. The future-value endpoint compounds a single lump sum, FV = PV·(1+r)^n, and the present-value endpoint discounts a future lump sum back to today, PV = FV/(1+r)^n. The annualize endpoint converts a total holding-period return over a span of years into an equivalent annual rate, and back the other way. The doubling-time endpoint gives the exact time for money to double, ln2/ln(1+r), alongside the Rule-of-72, Rule-of-70 and Rule-of-69.3 quick estimates — at 8 % money doubles in about nine years. Rates are decimals (0.07 = 7 %) except the doubling endpoint which takes a percentage. Everything is computed locally and deterministically, so it is instant and private. Ideal for fintech, investing, portfolio, robo-advisor, personal-finance and finance-education app developers, return-and-growth calculators, and dashboards. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 5 endpoints. These are single-sum growth and return metrics; for level-payment loans use a loan API and for regular-deposit savings a savings API.

api.oanor.com/cagr-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Break-Even Calculator API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Break-Even Calculator API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Break-Even Calculator 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 Break-Even Calculator API cost?
Break-Even Calculator API has a free tier with 100 calls / month. Paid plans start at €14.00 / 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 Break-Even Calculator API GDPR-compliant?
All requests to Break-Even Calculator 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/breakeven-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/breakeven-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/breakeven-api/SOME_PATH");
curl_setopt($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/breakeven-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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