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Keyword Density Analyzer
x402
Keyword Density Analyzer is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-01).
Analyzes input text and returns the top N keywords by count and density percentage, computed locally without any network calls.
Price / call$0.002
Success—
StatusUnknown
How this service works
Call when an agent needs top keyword counts and density for text. No network. Exact $0.002 USDC. Prefer unpaid POST /v1/sandbox/keyword-density first.
Output
Returns a ranked list of the top N keywords found in the input text, each with its occurrence count and density as a percentage of total words, computed entirely locally without any external calls.
Example use cases
SEO keyword saturation check
“I've written a 500-word blog post draft — can you tell me the top 20 most frequent keywords and their density percentages so I can see if I'm over-optimizing any term?”
Competitor content keyword audit
“Here's the text from a competitor's landing page. What are the top 10 keywords they're using and how dense is each one? I want to see what terms they're pushing hardest.”
Document topic extraction
“Take this legal contract text and pull out the top 25 most frequently occurring words with their counts and density — I want to quickly understand what concepts dominate the document.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/keyword-density?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need fast, deterministic keyword frequency and density statistics from raw text without any AI inference or network dependency. It is ideal for SEO audits, content analysis pipelines, and document profiling where exact counts matter. Try the unpaid sandbox at POST /v1/sandbox/keyword-density first to avoid incurring the $0.002 USDC cost during development or testing.
Side effects
- Empty or missing text field returns a validation error
- Limit value outside 1–50 range returns a schema validation error
- Text exceeding 100,000 characters is rejected
- Payment of exactly $0.002 USDC required; incorrect payment amount causes a 402 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Text to scan for keywords. Stopwords are removed. |
| limit | integer | How many top terms to return, from 1 to 50. Omit it for the default cap. |
Tags
x402
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