keyword-extractor

name	Keyword Extractor
slug	keyword-extractor
description	Extract top keywords and keyphrases from text using TF-IDF scoring. Use when agents need to tag content, optimize SEO, build search indexes, or summarize topics. Returns ranked single words and multi-word phrases with frequency counts.
category	NLP
tags	["keywords","nlp","seo","tf-idf","content-tagging","text-analysis"]
price_per_call	0
input_schema	{"type":"object","properties":{"text":{"type":"string","description":"Text to extract keywords from (20-100,000 chars)"},"max_keywords":{"type":"number","description":"Max keywords to return (default 20, max 50)"}},"required":["text"]}
output_schema	{"type":"object","properties":{"keywords":{"type":"array","description":"Ranked keywords with term, score, count, type"},"top_words":{"type":"array","description":"Top 10 single-word keywords"},"top_phrases":{"type":"array","description":"Top 5 multi-word keyphrases"}}}
metadata	{"requires":{"env":["CLAW0X_API_KEY"]}}

Keyword Extractor

Extract the most important keywords and keyphrases from any text. Uses TF-IDF scoring with stop word removal and bigram detection. No external API needed.

How It Works

1. Tokenize text, filter stop words and short tokens
2. Calculate term frequency (TF) for each word
3. Detect significant bigrams (2-word phrases appearing 2+ times)
4. Score phrases with 1.5x bonus over single words
5. Return ranked list with scores and counts

Use Cases

• SEO optimization (find target keywords)
• Content tagging (auto-label articles)
• Search index building (extract index terms)
• Topic summarization (what is this text about?)
• Competitive analysis (keyword gap detection)

Prerequisites

1. Sign up at claw0x.com
2. Create API key in Dashboard
3. Set environment variable: export CLAW0X_API_KEY="ck_live_..."

Pricing

FREE. No charge per call.

• Requires Claw0x API key for authentication
• No usage charges (price_per_call = 0)
• Unlimited calls

Example

Input:

{
  "text": "Machine learning models require large datasets for training. Deep learning neural networks have revolutionized machine learning by enabling automatic feature extraction from raw data.",
  "max_keywords": 10
}

Output:

{
  "keywords": [
    {"term": "machine learning", "score": 8.5, "count": 2, "type": "phrase"},
    {"term": "learning", "score": 5.2, "count": 3, "type": "word"},
    {"term": "deep", "score": 3.1, "count": 1, "type": "word"}
  ],
  "top_words": ["learning", "deep", "training", "data", "neural"],
  "top_phrases": ["machine learning", "deep learning", "neural networks"]
}

Error Codes

Code	Meaning
400	Text too short (<20 chars) or too long (>100K)
401	Missing or invalid API key
500	Extraction failed (not billed)

About Claw0x

Claw0x is the native skills layer for AI agents.

GitHub: github.com/kennyzir/keyword-extractor