Keyword density: top keywords and phrases of a text or page

$0.01 per call · failed calls are never charged · no account or API key needed

Keyword density of a text or a web page: the most frequent words and two-word phrases (English stop words removed), each with its count and share of all words, plus total and unique word counts. Give text, or a URL whose readable text is used (HTML, up to 1 MB). Use for SEO copy checks, comparing a page against a target keyword, or summarising what a page is about; for readability use text_stats.

Run it free (25 free calls) Buy credits by card (from $5) Example result (JSON)

Try it with your own inputs

The text (up to 50,000 characters); or give url instead

Uses one of your 25 free calls. Nothing is charged, and a call that fails is not counted.

Inputs

NameTypeDescription
textstringThe text (up to 50,000 characters); or give url instead
urlstringA page URL to analyse instead of text
topintegerHow many keywords and phrases to return, 1-50 (default 15)

Request

Over HTTP, with a card key from /credits:

curl -H "Authorization: Bearer adt_…" "https://agent-data-tools.revmesh2074.workers.dev/text/keyword-density?text=Agents%20pay%20per%20call.%20Agents%20pay%20with%20USDC.%20Pay%20per%20call%20tools%20for%20agents."

Or one of your 25 free calls, no key:

curl "https://agent-data-tools.revmesh2074.workers.dev/text/keyword-density?text=Agents%20pay%20per%20call.%20Agents%20pay%20with%20USDC.%20Pay%20per%20call%20tools%20for%20agents.&trial=1"

Without a key, the same URL answers 402 Payment Required with x402 and MPP terms, so an agent with a wallet pays per call in USDC (Base, Polygon, Arbitrum or Solana over x402; Base or Tempo over MPP) and retries.

Example result

{
  "source": "text",
  "totalWords": 14,
  "uniqueWords": 7,
  "keywords": [
    {
      "word": "agents",
      "count": 3,
      "densityPct": 21.43
    },
    {
      "word": "pay",
      "count": 3,
      "densityPct": 21.43
    }
  ],
  "phrases": [
    {
      "phrase": "pay per",
      "count": 2,
      "densityPct": 14.29
    }
  ]
}

From an AI agent (MCP)

Add the MCP server to Claude, Cursor or any MCP client. This tool is text_keyword_density, and the first 25 successful calls are free:

https://agent-data-tools.revmesh2074.workers.dev/mcp

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