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API · /textnlp-api

Text NLP API

healthy 3,976 Subscribers

A fast, fully-local natural-language toolkit for English and beyond: sentiment analysis with an AFINN score, comparative value, positive/negative label and the matched words; named-entity extraction (people, places, organisations, topics, dates, values, emails and hashtags); part-of-speech tagging (nouns, verbs, adjectives, adverbs, pronouns); keyword and noun-phrase extraction by frequency; tokenization into sentences and tokens with readability statistics (word, sentence and syllable counts, reading time and Flesch reading-ease); and language detection returning an ISO 639-3 code and language name. Every endpoint takes text via the query string or the request body and returns lean JSON. Pure server-side computation (no third-party upstream, no token costs), so responses are instant and always available. Ideal for moderation and feedback analysis, chatbots, search and tagging, content tooling and analytics.

#nlp #sentiment #text-analysis #entities #language-detection #keywords #dev-tools
api.oanor.com/textnlp-api
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Machine-readable spec so AI agents can integrate this API.

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

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

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
76 ms
Server probes · 24h
Subscribers
3,976
active
Total calls
18
last 7 days
status Full status page → · 18 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 35,000 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 35,000 calls/month, 2 req/s
  • Sentiment, entities, POS, keywords, tokenize & language
  • No credit card
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Basic

€6.20 /month

  • 500,000 calls / month
  • 12 requests / second
  • Hard cap (429 above quota, no overage)
  • 500,000 requests/month, 12 req/s
  • All endpoints, readability stats & entity extraction
  • Commercial use included
  • Email support
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Pro

€18.50 /month

  • 3,500,000 calls / month
  • 40 requests / second
  • Hard cap (429 above quota, no overage)
  • 3,500,000 requests/month, 40 req/s
  • High throughput for moderation, search & analytics
  • Priority email support
  • Commercial use allowed
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Mega

€47.00 /month

  • 18,000,000 calls / month
  • 120 requests / second
  • Hard cap (429 above quota, no overage)
  • 18,000,000 requests/month, 120 req/s
  • Highest throughput for production text pipelines
  • Priority support
  • Commercial use allowed
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Built by

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Related APIs

Other APIs with overlapping tags.

Stopwords API

Stopword lists and removal for 58 languages. Fetch the full stopword list for a language, see all supported languages with their word counts, check whether a single word is a stopword, or strip stopwords out of a block of text to get a clean keyword stream. Built on the open stopwords-iso dataset and served entirely in-memory, so responses are instant and the service is always available. Ideal for search indexing and relevance, NLP preprocessing and text mining, keyword extraction, tag generation and content tooling.

api.oanor.com/stopwords-api

Words API

Find words by meaning, sound and spelling — similar-meaning words (thesaurus), rhymes, autocomplete suggestions and wildcard spelling matches. Backed by Datamuse. Ideal for writing assistants, autocomplete, crosswords, word games, poetry tools and NLP preprocessing.

api.oanor.com/words-api

Translation API

Translate text between 40+ languages with a confidence score and alternative suggestions. Simple GET interface, no model hosting — ideal for localising content, chat messages, product data and user-generated text.

api.oanor.com/translate-api

Sentiment & NLP API

Analyse text in real time: sentiment scoring (positive / negative / neutral with the matched words), automatic language detection across 180+ languages, and a combined analysis endpoint with text statistics. No setup, no model hosting.

api.oanor.com/nlp-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Text NLP API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Text NLP API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Text NLP 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 NLP API cost?
Text NLP API has a free tier with 100 calls / month. Paid plans start at €6.20 / 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 NLP API GDPR-compliant?
All requests to Text NLP 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/textnlp-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/textnlp-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/textnlp-api/SOME_PATH");
curl_setopt($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/textnlp-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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