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API · /languages-api

Languages API

healthy 3,602 Subscribers

A clean reference for the world’s languages. Look up any language by its ISO 639-1 (two-letter) or ISO 639-2 (three-letter) code or by name, search by English or native name, list every language with an optional right-to-left filter, or group languages by family. Each entry includes the ISO codes, English and native names, language family, a right-to-left flag and a Wikipedia link. Built on the open ISO 639 dataset and served entirely in-memory, so responses are instant and the service is always available. Ideal for internationalization and localization, language pickers and selectors, content tagging and developer tooling.

#languages #iso639 #i18n #localization #reference #data
api.oanor.com/languages-api
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Machine-readable spec so AI agents can integrate this API.

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

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

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
78 ms
Server probes · 24h
Subscribers
3,602
active
Total calls
16
last 7 days
status Full status page → · 16 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 5,000 calls / month
  • 3 requests / second
  • Hard cap (429 above quota, no overage)
  • 5,000 requests/month, 3 req/s
  • Lookup, search, list & by-family
  • ISO 639-1/639-2, native names, RTL
  • No credit card
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Basic

€4.00 /month

  • 100,000 calls / month
  • 10 requests / second
  • Hard cap (429 above quota, no overage)
  • 100,000 requests/month, 10 req/s
  • Right-to-left filter
  • Language families
  • Commercial use, email support
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Pro

€10.00 /month

  • 1,000,000 calls / month
  • 25 requests / second
  • Hard cap (429 above quota, no overage)
  • 1,000,000 requests/month, 25 req/s
  • High-volume i18n lookups
  • Search by native name
  • Priority email support
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Mega

€28.00 /month

  • 6,000,000 calls / month
  • 60 requests / second
  • Hard cap (429 above quota, no overage)
  • 6,000,000 requests/month, 60 req/s
  • Localization-platform scale
  • Maximum concurrency
  • Priority support
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Built by

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Reference data for all 250 countries and territories — capitals, ISO codes (alpha-2/alpha-3), currencies, languages, flags, population, area, borders, calling codes and more. Look up by name, ISO code, region, currency or language.

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Wikipedia API

A fast, clean wrapper over the official Wikimedia APIs covering every Wikipedia language: full-text article search with snippets, lead-section summaries (extract, short description, thumbnail and canonical URL), "on this day" historical events, births, deaths and holidays for any calendar day, and a random-article endpoint. Every endpoint takes a "lang" parameter (en, de, fr, es, simple, zh and any other Wikipedia language) and accepts input via the query string or the request body. Returns lean, predictable JSON with HTML stripped and entities decoded — no scraping, no rate-limit juggling, no client-side parsing. Ideal for chatbots and RAG pipelines, trivia and "this day in history" apps, knowledge panels, education and research tools.

api.oanor.com/wiki-api

Books API

Search millions of books, look up editions by ISBN-10/13 and find authors — with covers, publish years, publishers, page counts and subjects. Powered by Open Library (Internet Archive).

api.oanor.com/books-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Languages API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Languages API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Languages 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 Languages API cost?
Languages API has a free tier with 100 calls / month. Paid plans start at €4.00 / 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 Languages API GDPR-compliant?
All requests to Languages 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/languages-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/languages-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/languages-api/SOME_PATH");
curl_setopt($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/languages-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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