Keyword Extractor API

About the Keyword Extractor API

Keyword Extractor works by analyzing the text and extracting the keywords based on their frequency. It uses advanced algorithms to extract the keywords and returns the keywords in a structured format.

What people use it for

Competitor Webpage Audit

SEO specialists submit competitor article URLs to see top keyword density and discover which subjects competitors focus on.

Editorial CMS Tagging

When editors draft articles, publishing systems read the returned top terms to auto-suggest relevant tags and taxonomy categories before publication.

Support Ticket Categorization

Classify high-volume helpdesk requests automatically by mapping recurring keywords and frequency counts from incoming ticket text to triage queues.

Ad Copy Term Analysis

Marketing teams check landing pages against prospective ad copy to align top keyword frequencies with targeted search ad campaigns.

Ways to call it

One endpoint, many ways in — REST with JSON, XML, YAML and CSV, plus GraphQL and an MCP interface for AI agents.

JSON

Default REST response

XML

Markup format

YAML

Human-readable

CSV

Tabular export

Beta

GraphQL

Query language

New

MCP

For AI agents

Request parameters — POST /v1/keywordextractor

Sent as JSON in the request body. Premium parameters are accepted on every plan but only take effect on plans that include them. Anything not listed here is dropped rather than passed through.

Required

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curl -X POST "https://api.apiverve.com/v1/keywordextractor" \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"text":"Machine learning is a subset of artificial intelligence that enables systems to learn from data. Deep learning uses neural networks to process complex patterns in data."}'

Authentication

Send your key in the x-api-key header. That is the only auth step — no token exchange, and no per-endpoint scope to configure.

Response — POST /v1/keywordextractor

Every APIVerve endpoint returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape.

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{
  "status": "ok",
  "error": null,
  "data": {
    "url": "https://en.wikipedia.org/wiki/Email_address",
    "keywordCount": 50,
    "topKeyword": "email",
    "totalOccurrences": 672,
    "keywords": {
      "email": 94,
      "address": 61,
      "mail": 52,
      "domain": 34,
      "addresses": 34,
      "characters": 27,
      "retrieved": 27,
      "internet": 17,
      "message": 15,
      "validation": 12
    },
    "topKeywords": [
      {
        "keyword": "email",
        "count": 94,
        "percentage": 14
      },
      {
        "keyword": "address",
        "count": 61,
        "percentage": 9.1
      },
      {
        "keyword": "mail",
        "count": 52,
        "percentage": 7.7
      },
      {
        "keyword": "domain",
        "count": 34,
        "percentage": 5.1
      },
      {
        "keyword": "addresses",
        "count": 34,
        "percentage": 5.1
      }
    ]
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Response headers

Every response carries your balance, so your own code always knows where it stands without polling anything. All four are exposed to browsers through CORS.

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change.

What a call costs — 10 credits per call

Credits are shared across every APIVerve API — one balance, one key, one bill. Failed requests never count against it, so a rejected input costs nothing.

Calls are what the credits buy at this API's rate — spend them here, on any of the other APIs, or across both. Nothing is reserved per endpoint.

Zero-code embed — one snippet, no backend

Drop an interactive Keyword Extractor form onto any page. The widget calls the API for you, so no key ever appears in your markup and there is nothing to deploy.

Changelog — Keyword Extractor API

Every change to this endpoint, newest first. Breaking changes ship as a new version and the previous one keeps serving — response fields are added, never removed or retyped in place, so an integration written against v1 keeps working.

Currently v1