# Keyword research API, keyword ideas

Keyword ideas for SEO and ads: the search phrases real users type for a seed keyword, from Google, Bing, YouTube, Amazon and DuckDuckGo autocomplete, deduplicated and ranked by how many engines suggest each, with question and buying-intent phrases listed apart. deep=true adds the Google long tail (seed + a-z, how, what, best, vs), up to 200 keywords. Use to plan content, find long-tail and question keywords, or name a product. No search volumes.

## Keyword ideas, keyword research

Keyword ideas, keyword research. $0.01 per successful call; failed calls are never charged.

Keyword ideas for SEO and ads: the search phrases real users type for a seed keyword, from Google, Bing, YouTube, Amazon and DuckDuckGo autocomplete, deduplicated and ranked by how many engines suggest each, with question and buying-intent phrases listed apart. deep=true adds the Google long tail (seed + a-z, how, what, best, vs), up to 200 keywords. Use to plan content, find long-tail and question keywords, or name a product. No search volumes.

Inputs: seed (required): Seed keyword or topic, 2-80 characters; deep: true to add the Google long tail (seed + each letter, question words); about 30 more lookups; engines: Optional comma list: google, bing, youtube, amazon, duckduckgo (default all); lang: Language code (default en); country: Country code (default us).

Free first (25 successful calls per caller, no key):

    curl "https://agent-data-tools.revmesh2074.workers.dev/keywords/ideas?seed=crm%20software&trial=1"

With a card key from https://agent-data-tools.revmesh2074.workers.dev/credits, in a header or, when your client can only fetch a URL, in the URL:

    curl -H "Authorization: Bearer adt_…" "https://agent-data-tools.revmesh2074.workers.dev/keywords/ideas?seed=crm%20software"
    curl "https://agent-data-tools.revmesh2074.workers.dev/keywords/ideas?seed=crm%20software&api_key=adt_…"

Without a key the same URL answers 402 with x402 and MPP terms, so a wallet client pays USDC per call and retries. Over MCP (https://agent-data-tools.revmesh2074.workers.dev/mcp) this tool is keywords_ideas.

Example result:

    {
      "seed": "crm software",
      "lang": "en",
      "country": "us",
      "deep": false,
      "enginesAnswered": [
        "google",
        "bing",
        "duckduckgo"
      ],
      "enginesFailed": [],
      "count": 2,
      "keywords": [
        {
          "keyword": "crm software free",
          "engines": [
            "google",
            "bing",
            "duckduckgo"
          ],
          "engineCount": 3,
          "words": 3,
          "question": false,
          "commercial": true
        },
        {
          "keyword": "crm software meaning",
          "engines": [
            "google",
            "bing"
          ],
          "engineCount": 2,
          "words": 3,
          "question": false,
          "commercial": false
        }
      ],
      "questions": [],
      "commercial": [
        "crm software free"
      ],
      "note": "Phrases real users type, from search-engine autocomplete. engineCount is a popularity signal, not a search volume.",
      "checkedAt": "2026-11-05T19:30:00.000Z"
    }

Tool page: https://agent-data-tools.revmesh2074.workers.dev/tools/keywords-ideas

## SEO audit, on-page: title, meta, headings, links and issues

SEO audit, on-page: title, meta, headings, links and issues. $0.01 per successful call; failed calls are never charged.

On-page SEO audit of one URL: title and meta description with their lengths, canonical, meta robots, H1s and H2 count, images without alt text, lang and viewport, Open Graph and Twitter card tags, JSON-LD blocks, internal and external link counts and word count, plus a list of issues and a 0-100 score. Reads the server's HTML (no JavaScript), up to 1 MB. Use to check a page before publishing or to compare competitors.

Inputs: url (required): Absolute http(s) URL of the page.

Free first (25 successful calls per caller, no key):

    curl "https://agent-data-tools.revmesh2074.workers.dev/seo/audit?url=https%3A%2F%2Fwww.wikipedia.org%2F&trial=1"

With a card key from https://agent-data-tools.revmesh2074.workers.dev/credits, in a header or, when your client can only fetch a URL, in the URL:

    curl -H "Authorization: Bearer adt_…" "https://agent-data-tools.revmesh2074.workers.dev/seo/audit?url=https%3A%2F%2Fwww.wikipedia.org%2F"
    curl "https://agent-data-tools.revmesh2074.workers.dev/seo/audit?url=https%3A%2F%2Fwww.wikipedia.org%2F&api_key=adt_…"

Without a key the same URL answers 402 with x402 and MPP terms, so a wallet client pays USDC per call and retries. Over MCP (https://agent-data-tools.revmesh2074.workers.dev/mcp) this tool is seo_audit.

Example result:

    {
      "url": "https://www.wikipedia.org/",
      "finalUrl": "https://www.wikipedia.org/",
      "status": 200,
      "score": 64,
      "issues": [
        "no canonical link"
      ],
      "title": "Wikipedia",
      "titleLength": 9,
      "description": "Wikipedia is a free online encyclopedia…",
      "descriptionLength": 120,
      "canonical": null,
      "robots": null,
      "h1": [
        "Wikipedia The Free Encyclopedia"
      ],
      "h2Count": 1,
      "images": 2,
      "imagesWithoutAlt": 0,
      "lang": "en",
      "viewport": true,
      "openGraph": {
        "title": null,
        "description": null,
        "image": null
      },
      "twitterCard": null,
      "jsonLdBlocks": 0,
      "links": {
        "internal": 30,
        "external": 300
      },
      "wordCount": 1500
    }

Tool page: https://agent-data-tools.revmesh2074.workers.dev/tools/seo-audit

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

Keyword density: top keywords and phrases of a text or page. $0.04 per successful call; failed calls are never charged.

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.

Inputs: text: The text (up to 50,000 characters); or give url instead; url: A page URL to analyse instead of text; top: How many keywords and phrases to return, 1-50 (default 15).

Free first (25 successful calls per caller, 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"

With a card key from https://agent-data-tools.revmesh2074.workers.dev/credits, in a header or, when your client can only fetch a URL, in the URL:

    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."
    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.&api_key=adt_…"

Without a key the same URL answers 402 with x402 and MPP terms, so a wallet client pays USDC per call and retries. Over MCP (https://agent-data-tools.revmesh2074.workers.dev/mcp) this tool is text_keyword_density.

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
        }
      ]
    }

Tool page: https://agent-data-tools.revmesh2074.workers.dev/tools/text-keyword-density

## Questions

Docs for agents: https://agent-data-tools.revmesh2074.workers.dev/llms.txt · OpenAPI: https://agent-data-tools.revmesh2074.workers.dev/openapi.json · All guides: https://agent-data-tools.revmesh2074.workers.dev/guides