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API · /gpa-api

GPA API

healthy 3,627 Subscribers

Calculate a weighted grade-point average (GPA). The calc endpoint takes a list of courses — each with a grade and the credit hours it is worth — and returns the credit-weighted GPA, the totals, and a per-course breakdown of quality points so you can see exactly how the average was formed. Grades may be US letter grades (A, A-, B+, … F) on the standard 4.0 scale, or 4.3 with the us_plus scale that gives A+ extra weight; percentages from 0 to 100 mapped to letters and points with the usual cutoffs; raw grade points given directly as numbers; or your own custom letter-to-point mapping for any institution's scheme. Courses can be passed as a JSON array or a compact string like "A:3,B+:4,C:2", and credits default to 1 for an unweighted average. The scales endpoint lists the built-in grade scales and their point values. Everything is computed locally and deterministically, so it is instant and private — no student data is stored. Ideal for student planners and dashboards, university and school portals, LMS and ed-tech apps, scholarship and admissions tools, and academic what-if calculators. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This computes GPA; for general statistics use a statistics API.

#gpa #grades #education #calculator #academic #developer-tools
api.oanor.com/gpa-api
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Machine-readable spec so AI agents can integrate this API.

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

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

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
90 ms
Server probes · 24h
Subscribers
3,627
active
Total calls
33
last 7 days
status Full status page → · 18 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 4,735 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 4,735 calls/month
  • 2 req/sec
  • Weighted GPA + breakdown
  • No credit card
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Starter

€6.25 /month

  • 14,250 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 14.25k calls/month
  • 8 req/sec
  • US / percentage / custom scales
  • Email support
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Pro

€26.15 /month

  • 193,500 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • 193.5k calls/month
  • 20 req/sec
  • LMS / ed-tech / portal pipelines
  • Priority support
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Mega

€64.15 /month

  • 1,010,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 1.01M calls/month
  • 50 req/sec
  • Platform scale
  • Dedicated SLA
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api.oanor.com/climbgrade-api

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api.oanor.com/gradecalc-api

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Real example sentences with human translations as an API — powered by Tatoeba, the large collaborative corpus of millions of sentences in hundreds of languages, each linked to translations contributed and reviewed by real people (not machine translation). Search for sentences containing a word or phrase in one language and get how they are actually translated into another — perfect for seeing a word "in the wild", building vocabulary and flashcards, or as a human-quality translation aid. Look up any sentence by id to get its full set of translations. From "good morning" in English to its German, French, Spanish, Japanese or Mandarin equivalents, across ISO-639-3 languages, it is ideal for language-learning, vocabulary, flashcard, dictionary-companion and linguistics applications. A human-translated example-sentence corpus — distinct from dictionaries (definitions), machine translation and word APIs. Open data from Tatoeba (CC-BY 2.0 FR / CC0).

api.oanor.com/tatoeba-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for GPA API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call GPA API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for GPA 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 GPA API cost?
GPA API has a free tier with 100 calls / month. Paid plans start at €6.25 / 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 GPA API GDPR-compliant?
All requests to GPA 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/gpa-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/gpa-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/gpa-api/SOME_PATH");
curl_setopt($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/gpa-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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