Keywords and keyphrases
Two ranked lists in one response — single keywords and short multi-word phrases.
CatalogLatency Typically 0.5–2 seconds Async false Rate Limit Per API key Max Input No hard limit; longer texts surface more terms
cn8/text-keywords
Send a `text` and get back two ranked lists: `keywords` (single words) and
Learn more about Keyword Extraction Text NLPsyncInstant previewtextanalysisnlp
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Overview
Send a text and get back two ranked lists: keywords (single words) and keyphrases (short multi-word phrases), each with a relevance score. Both lists come back sorted, highest first, so you can use them right away. Responses are synchronous. Great for SEO and metadata, search indexing and quick content summaries.
Key capabilities
Relevance scoring
Each term is scored for how well it represents the document.
Pre-ranked output
Both lists arrive sorted by score, highest first — no extra sorting needed.
Multilingual
Extracts terms across many languages.
When to use it
SEO and metadata
Auto-generate keywords and tags for articles, pages and product listings.
Search indexing
Enrich documents with extracted terms for better full-text search.
Quick content summary
Get a keyword snapshot of a long document at a glance.
Input & output
input
text: a single string to analyze.
JSON body
output
A keywords[] list and a keyphrases[] list, both ranked by score.
JSON
Guides & tips
How it works
- Candidate words and short phrases are pulled from your text and scored for relevance.
- Both lists come back ranked by score, highest first.
- You always receive both
keywords(single words) andkeyphrases(multi-word phrases) — use whichever you need.
Tips
- Send one text per request as
{text: "..."}. - Keyword entries use the field
keyword; keyphrase entries use the fieldphrase. - Keyphrases often capture useful concepts even when the individual words look generic — use them for headlines and tags, and keywords for indexing.
Specs
Schema
Request body
textrequiredstringThe text to analyze.
Response
keywordsarray<object>Single-word keywords, ranked by score. Each item is {keyword, score}.
keyphrasesarray<object>Multi-word phrases, ranked by score. Each item is {phrase, score} — the field is `phrase`, not `keyword`.
Pricing
Billed per request.
| Service | Unit | Price |
|---|---|---|
| Keyword Extraction | item | $0.004/request |