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API · /phonetic-api

NATO Phonetic Alphabet API

healthy 4,924 Subscribers

NATO phonetic alphabet conversion as an API, computed locally and deterministically. The spell endpoint turns any text into the international radiotelephony spelling alphabet used by aviation, the military, emergency services and call centres — letters become Alfa, Bravo, Charlie and so on (case-insensitive), digits use the ICAO forms (Niner for nine), spaces are marked, and unknown characters pass through — so SOS becomes “Sierra Oscar Sierra” and ABC123 becomes “Alfa Bravo Charlie One Two Three”. The decode endpoint reverses it, turning a string of phonetic words back into the original characters and accepting common spelling variants (Alpha or Alfa, X-ray or Xray, Juliet or Juliett, Nine or Niner), flagging any words it does not recognise. Everything is computed locally and deterministically, so it is instant and private. Ideal for aviation, radio, telecom, call-centre, customer-support, accessibility and voice app developers, spelling-out and read-back tools, and IVR systems. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 2 endpoints. This is the NATO/ICAO spelling alphabet; for Morse code use a Morse API.

#phonetic-alphabet #nato #icao #spelling #radio #developer-tools
api.oanor.com/phonetic-api
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Machine-readable spec so AI agents can integrate this API.

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

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

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
101 ms
Server probes · 24h
Subscribers
4,924
active
Total calls
58
last 7 days
status Full status page → · 9 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 8,000 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 8,000 calls/month
  • 2 req/sec
  • Spell + decode (NATO/ICAO)
  • No credit card
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Starter

€3.30 /month

  • 80,000 calls / month
  • 6 requests / second
  • Hard cap (429 above quota, no overage)
  • 80,000 calls/month
  • 6 req/sec
  • Digits, variants, space handling
  • Email support
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Pro

€9.50 /month

  • 350,000 calls / month
  • 15 requests / second
  • Hard cap (429 above quota, no overage)
  • 350,000 calls/month
  • 15 req/sec
  • IVR & call-centre pipelines
  • Priority support
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Mega

€30.00 /month

  • 1,850,000 calls / month
  • 40 requests / second
  • Hard cap (429 above quota, no overage)
  • 1,850,000 calls/month
  • 40 req/sec
  • Platform scale
  • Dedicated SLA
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Related APIs

Other APIs with overlapping tags.

Aircraft Types API

Resolve and search aircraft type designators — turn the IATA (e.g. 738) and ICAO (e.g. B738) aircraft codes returned by flight-data APIs into readable model names like "Boeing 737-800". Look up by IATA code, ICAO code or name, search 240+ aircraft types, or fetch the whole list. Bundled, fast and always available — a handy companion to flight, airline and airport data.

api.oanor.com/aircraft-api

Airlines API

Search a database of 6,000+ airlines worldwide (OpenFlights open dataset). Find carriers by name and country, look one up by its IATA (2-letter) or ICAO (3-letter) code, and browse counts per country. Each record includes the airline name, codes, radio callsign, country and active status — ideal for travel apps, booking flows, flight dashboards and aviation tooling.

api.oanor.com/airlines-api

Airports API

A worldwide airport database in one fast API: roughly 7,700 airports with IATA and ICAO codes, name, city, country, latitude and longitude, altitude and time zone. Look up any airport by its IATA (3-letter) or ICAO (4-letter) code, search by name, city or country, find the airports nearest to any coordinate within a radius (with great-circle distances, optionally only those with IATA codes), or list every airport in a country. Built on the open OpenFlights/OurAirports dataset and served entirely in-memory, so responses are instant and the service is always available. Ideal for travel and booking apps, flight trackers, logistics and routing, maps and location features.

api.oanor.com/airports-api

Grammar API

Catch spelling mistakes in six languages — English, German, Spanish, French, Portuguese and Dutch — and get English style and grammar suggestions in one call. Spelling errors come with their position in the text and a ranked list of corrections; style suggestions flag repeated words, weasel words, passive voice, wordiness, clichés and more. A combined check returns spelling and style together (sorted by position), a spelling-only endpoint covers all six languages, a single-word endpoint returns corrections for one word, and a languages endpoint lists what is supported. Every endpoint takes text via the query string or the request body and returns lean JSON. Pure server-side computation (Hunspell dictionaries + write-good, no third-party upstream, no LLM cost), so responses are instant and always available. Ideal for editors and CMSs, form and comment validation, chat and email tools, and writing assistants.

api.oanor.com/grammar-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for NATO Phonetic Alphabet API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call NATO Phonetic Alphabet API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for NATO Phonetic Alphabet 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 NATO Phonetic Alphabet API cost?
NATO Phonetic Alphabet API has a free tier with 100 calls / month. Paid plans start at €3.30 / 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 NATO Phonetic Alphabet API GDPR-compliant?
All requests to NATO Phonetic Alphabet 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/phonetic-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/phonetic-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/phonetic-api/SOME_PATH");
curl_setopt($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/phonetic-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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