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API · /math-api

Math API

healthy 4,596 Subscribers

A full math engine as an API, powered by mathjs. Evaluate any expression — arithmetic, hundreds of functions (sqrt, sin, log, gcd, factorial, combinations, …), constants (pi, e), complex numbers, matrices and number theory — with optional precision control (e.g. 2+3*sqrt(16) → 14, pi at 5 digits → 3.1416). Take the symbolic derivative of an expression with respect to a variable (x^2+3x → 2*x+3), and simplify algebra (2x+3x → 5*x). No formula libraries to bundle, no maths to reimplement: send an expression, get the answer. Ideal for calculators and STEM education apps, spreadsheet and form logic, quiz and homework tools, engineering and data dashboards, and any product that needs reliable server-side computation.

#math #calculator #mathjs #algebra #calculus #evaluate
api.oanor.com/math-api
Get an API key Try in playground → Contact provider

Machine-readable spec so AI agents can integrate this API.

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

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

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
270 ms
Server probes · 24h
Subscribers
4,596
active
Total calls
20
last 7 days
status Full status page → · 20 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 12,500 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 12,500 calls/month
  • 2 req/sec
  • Evaluate, derivative, simplify
  • No credit card
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Starter

€3.80 /month

  • 185,000 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 185k calls/month
  • 8 req/sec
  • Precision control
  • Email support
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Pro

€11.10 /month

  • 820,000 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • 820k calls/month
  • 20 req/sec
  • Calculators & edu apps
  • Priority support
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Mega

€32.60 /month

  • 3,300,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 3.3M calls/month
  • 50 req/sec
  • High-traffic STEM platforms
  • Dedicated SLA
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Built by

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PremiumApi

Related APIs

Other APIs with overlapping tags.

Number Base Converter API

Convert integers between any numeral systems with exact big-integer math. Pass a number and a from/to base (radix 2 to 36, arbitrarily large, signed) and the convert endpoint returns the result and the decimal value; common 0x, 0b and 0o prefixes are accepted when they match the base, and whitespace or underscores in the input are ignored. The bases endpoint shows a single number across binary, octal, decimal, hexadecimal, base32 and base36 at once, together with its bit length, byte length and sign. Everything is computed locally with BigInt, so values of any size are exact and deterministic. Ideal for low-level and embedded debugging, networking and bit-twiddling work, teaching number systems, and anywhere you juggle hex, binary and decimal. A numeral-base converter — distinct from the text-encoding toolkit (encoding: base64/base32/hex of bytes), the Elixir/Erlang Hex package registry (hex) and number-to-words (numberwords). No upstream key, no cache.

api.oanor.com/baseconvert-api

Health Calculator API

A complete health & fitness calculator suite in one API: Body Mass Index with category and healthy-weight range, Basal Metabolic Rate (Mifflin-St Jeor and Harris-Benedict), Total Daily Energy Expenditure with weight-loss/gain calorie targets, macronutrient splits (balanced, low-carb, high-protein, keto, endurance) with fibre, U.S. Navy body-fat percentage, ideal body weight across four classic formulas (Devine, Robinson, Miller, Hamwi), and daily water intake. Every endpoint accepts GET query parameters or a JSON POST body and works in both metric and imperial units. All computation is done locally with established public-domain equations, so responses are instant and the service is always available. Ideal for fitness trackers, nutrition apps, telehealth and wellness dashboards.

api.oanor.com/healthcalc-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Math API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Math API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Math 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 Math API cost?
Math API has a free tier with 100 calls / month. Paid plans start at €3.80 / 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 Math API GDPR-compliant?
All requests to Math 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/math-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/math-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/math-api/SOME_PATH");
curl_setopt($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/math-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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