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402utils Keyword Extraction (TextRank)
x402
402utils Keyword Extraction (TextRank) is a paid API for AI agents from 402utils.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Extracts top keywords and key-phrases from text using TextRank (word co-occurrence graph + PageRank), returning normalized scores — deterministic, model-free, and reproducible.
Price / call$0.002
Success—
StatusUnknown
How this service works
Extract salient keywords/key-phrases from text via TextRank (word co-occurrence graph + PageRank), merging adjacent high-ranked words into phrases. Pure, deterministic, model-free — extractive, NOT ML/NER or an LLM (the point: reproducible, no inference cost). English + French stopwords removed. Returns keywords[] with normalized scores (top ≈ 1). For content tagging/indexing and pre-RAG. Over 100k tokens is truncated.
Output
Returns an array of keywords/key-phrases with normalized relevance scores (top score ≈ 1), extracted via TextRank graph ranking. Adjacent high-ranked words are merged into phrases. English and French stopwords are removed. Input over 100k tokens is truncated.
Example use cases
Example prompt
“Pull the top 15 keywords and key-phrases from this article text using TextRank so I can tag it for our content index: [article text here].”
Technical details
Endpoint
POSThttps://402utils.com/v1/keywordsWhen to prefer
Use this endpoint when you need reproducible, deterministic keyword extraction with no ML inference cost or LLM dependency. Ideal for content tagging, document indexing, and pre-RAG preprocessing where consistency matters more than semantic understanding. Prefer over LLM-based keyword extraction when you need zero variance across runs, lower cost, or auditability. Supports English and French text best.
Side effects
- Text too large (>1 MB UTF-8) — input is silently truncated at 100k tokens, potentially losing content
- topK out of range (must be 1–50) — API returns validation error
- Empty or whitespace-only text — may return empty keywords array
- Non-English/non-French text — stopword removal only covers EN/FR, other languages may yield lower-quality results
- Payment failure — x402 protocol payment not completed, request rejected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | The text to analyze (max 1 MB UTF-8; larger is truncated). |
| topK | integer | How many key-phrases to return. |
Tags
x402
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