API · /segmenter-api

Text Segmentation API

healthy 3,876 Subscribers

Count and split text the way people actually read it, using Unicode-correct segmentation. The count endpoint returns the number of grapheme clusters — the real, user-perceived characters, so a family emoji counts as 1 (not 7) and an accented letter as 1 — alongside words, sentences, code points, UTF-16 code units (the naive string length that over-counts) and UTF-8 byte length. This is exactly what character-limit fields, tweet/SMS counters and validation need so the count agrees with what the user sees. The segment endpoint splits text into grapheme, word or sentence segments (word segments are flagged word-like versus punctuation and spaces) and is locale-aware, so Japanese, Chinese and Thai word boundaries come out right. Everything is computed locally with no network calls. A Unicode text segmenter — distinct from the Unicode codepoint database (unicode), the case/text-utilities toolkit (text) and string similarity (similarity). No upstream key, no cache.

api.oanor.com/segmenter-api
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Machine-readable spec so AI agents can integrate this API.

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

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

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
95 ms
Server probes · 24h
Subscribers
3,876
active
Total calls
0
last 7 days
status Full status page → · 3 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 2,020 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 2,020 calls/month
  • 2 req/sec
  • Counts + segmentation
  • No credit card
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Starter

€5.95 /month

  • 38,000 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 38k calls/month
  • 8 req/sec
  • Emoji-safe + CJK word splits
  • Email support
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Pro

€19.80 /month

  • 204,000 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • 204k calls/month
  • 20 req/sec
  • Char-limit & text pipelines
  • Priority support
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Mega

€51.80 /month

  • 790,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 790k calls/month
  • 50 req/sec
  • Text-platform scale
  • Dedicated SLA
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Built by

Related APIs

Other APIs with overlapping tags.

Unicode API

The Unicode Character Database (UCD) as an API. Resolve ANY codepoint (0..10FFFF, including the CJK and Hangul ranges) to its name, general category, block and script — plus the literal character, HTML entity (😀), CSS escape and UTF-8/UTF-16 byte sequences. Pass a hex codepoint (e.g. 1F600 → 😀 GRINNING FACE) or a literal character (?char=€). Search 40,000+ named characters by name (e.g. "heart", "arrow"), filter by category or block, and browse all 346 Unicode blocks. Ideal for text-processing tools, emoji pickers, editors, internationalization and developer utilities.

api.oanor.com/unicode-api

Emoji API

A complete emoji database in one fast API. Search roughly 1,870 emojis by name, keyword, alias or tag, look up a single emoji by its alias (like rocket or :fire:) or by the emoji character itself, browse any of the nine Unicode categories, or get random emojis (optionally from a category). Every emoji comes with its name, category, aliases, search tags, Unicode code points and the version it was introduced in. Built on the open GitHub gemoji dataset and served entirely in-memory, so responses are instant and the service is always available. Ideal for chat and messaging apps, emoji pickers and search, social and content tools, games and fun widgets.

api.oanor.com/emoji-api

Localized Names API

Get the localized display name of a code in any language — countries and regions, languages, currencies, scripts and calendars. Pass a code, a type and a locale and the name endpoint returns the right name: US as region in fr gives "États-Unis", de as language in fr gives "allemand", EUR as currency gives "Euro", and the same code reads correctly in German, Japanese, Arabic or any other locale. The list endpoint returns every code of a type localized and sorted in that locale's collation — ideal for building a country, language or currency dropdown in any language. Powered by the platform's full ICU data (Intl.DisplayNames) and computed locally with no network calls. Built for internationalised forms and pickers, multilingual UIs, localized reports and onboarding. A localized-names resolver — distinct from country reference data in English (countries), number and currency formatting (numberformat) and locale date formatting (datelocale). No upstream key, no cache.

api.oanor.com/displaynames-api

Relative Time & Locale Date API

Humanise timestamps and format dates for any locale and timezone using full ICU. The relative endpoint turns an instant into a localised relative phrase against now (or a given reference time) — "3 hours ago", "vor 3 Stunden", "in 2 days", "il y a 5 minutes" — automatically choosing the best unit from seconds to years. The format endpoint renders a localised date/time string (e.g. "mardi 2 juin 2026 à 15:30" or "2026年6月2日 22:30:00"), honouring the locale (BCP 47), a named IANA timezone, the chosen date and time styles (full/long/medium/short) and 12/24-hour preference, and returns a parts breakdown for custom displays. Pass dates as ISO 8601 or unix timestamps. Everything is computed locally with no network calls. Ideal for internationalised UIs, activity feeds, notifications, comments and dashboards. A relative-time and locale date formatter — distinct from current-time-in-a-timezone (time), the UTC parse/token toolkit (datetime) and number/currency formatting (numberformat). No upstream key, no cache.

api.oanor.com/datelocale-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Text Segmentation API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Text Segmentation API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Text Segmentation 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 Text Segmentation API cost?
Text Segmentation API has a free tier with 100 calls / month. Paid plans start at €5.95 / 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 Text Segmentation API GDPR-compliant?
All requests to Text Segmentation 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/segmenter-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/segmenter-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/segmenter-api/SOME_PATH");
curl_setopt($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/segmenter-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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