Keyword Extractor API

Overview

To use Keyword Extractor, you need an API key. You can get one by creating a free account and visiting your dashboard.

POST Endpoint

https://api.apiverve.com/v1/keywordextractor

Example

How to call the Keyword Extractor API in different programming languages.

curl -X POST \
  "https://api.apiverve.com/v1/keywordextractor" \
  -H "X-API-Key: your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
  "url": "https://en.wikipedia.org/wiki/Email_address"
}'

const response = await fetch('https://api.apiverve.com/v1/keywordextractor', {
  method: 'POST',
  headers: {
    'X-API-Key': 'your_api_key_here',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    "url": "https://en.wikipedia.org/wiki/Email_address"
})
});

const data = await response.json();
console.log(data);

import requests

headers = {
    'X-API-Key': 'your_api_key_here',
    'Content-Type': 'application/json'
}

payload = {
    "url": "https://en.wikipedia.org/wiki/Email_address"
}

response = requests.post('https://api.apiverve.com/v1/keywordextractor', headers=headers, json=payload)

data = response.json()
print(data)

package main

import (
    "fmt"
    "io"
    "net/http"
    "bytes"
    "encoding/json"
)

func main() {
    payload := map[string]interface{}{
        "url": "https://en.wikipedia.org/wiki/Email_address"
    }

    jsonPayload, _ := json.Marshal(payload)
    req, _ := http.NewRequest("POST", "https://api.apiverve.com/v1/keywordextractor", bytes.NewBuffer(jsonPayload))

    req.Header.Set("X-API-Key", "your_api_key_here")
    req.Header.Set("Content-Type", "application/json")

    client := &http.Client{}
    resp, err := client.Do(req)
    if err != nil {
        panic(err)
    }
    defer resp.Body.Close()

    body, _ := io.ReadAll(resp.Body)
    fmt.Println(string(body))
}

{
  "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
      }
    ]
  }
}

Authentication

The Keyword Extractor API requires authentication via API key. Include your API key in the request header:

X-API-Key: your_api_key_here

Learn more about authentication →

Interactive API Playground

Test the Keyword Extractor API directly in your browser with live requests and responses.

Parameters

The Keyword Extractor API supports multiple query options. Use one of the following:

Response

The Keyword Extractor API returns responses in JSON, XML, YAML, and CSV formats. The JSON response is shown in the Example section above; alternative formats below.

Other Response Formats

<?xml version="1.0" encoding="UTF-8"?>
<response>
  <status>ok</status>
  <error xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
  <data>
    <url>https://en.wikipedia.org/wiki/Email_address</url>
    <keywordCount>50</keywordCount>
    <topKeyword>email</topKeyword>
    <totalOccurrences>672</totalOccurrences>
    <keywords>
      <email>94</email>
      <address>61</address>
      <mail>52</mail>
      <domain>34</domain>
      <addresses>34</addresses>
      <characters>27</characters>
      <retrieved>27</retrieved>
      <internet>17</internet>
      <message>15</message>
      <validation>12</validation>
    </keywords>
    <topKeywords>
      <topKeyword>
        <keyword>email</keyword>
        <count>94</count>
        <percentage>14</percentage>
      </topKeyword>
      <topKeyword>
        <keyword>address</keyword>
        <count>61</count>
        <percentage>9.1</percentage>
      </topKeyword>
      <topKeyword>
        <keyword>mail</keyword>
        <count>52</count>
        <percentage>7.7</percentage>
      </topKeyword>
      <topKeyword>
        <keyword>domain</keyword>
        <count>34</count>
        <percentage>5.1</percentage>
      </topKeyword>
      <topKeyword>
        <keyword>addresses</keyword>
        <count>34</count>
        <percentage>5.1</percentage>
      </topKeyword>
    </topKeywords>
  </data>
</response>

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 Structure

All API responses follow a consistent structure with the following fields:

Learn more about response formats →

Response Data Fields

When the request is successful, the data object contains the following fields:

Headers

Only X-API-Key is required. Optional headers include Accept for response format negotiation (JSON, XML, or YAML), User-Agent, and X-Request-ID for request tracing. See all request headers →

GraphQL AccessALPHA

Access Keyword Extractor through GraphQL to combine it with other API calls in a single request. Query only the keyword extractor data you need with precise field selection, and orchestrate complex data fetching workflows.

Credit Cost: Each API called in your GraphQL query consumes its standard credit cost.

POST https://api.apiverve.com/v1/graphql

query {
  keywordextractor(
    input: {
      url: "https://en.wikipedia.org/wiki/Email_address"
    }
  ) {
    url
    keywordCount
    topKeyword
    totalOccurrences
    keywords {
      email
      address
      mail
      domain
      addresses
      characters
      retrieved
      internet
      message
      validation
    }
    topKeywords
  }
}

Note: Authentication is handled via the x-api-key header in your GraphQL request, not as a query parameter.

CORS Support

The Keyword Extractor API accepts cross-origin requests from any origin, so it can be called directly from browser-based applications without a proxy. See CORS support →

Rate Limiting

Keyword Extractor requests are throttled per minute on the Free plan and unthrottled on paid plans. Exceeding the limit returns 429 Too Many Requests; rate-limit usage is reported in the X-RateLimit-Limit, X-RateLimit-Remaining, and X-RateLimit-Reset response headers. See per-plan limits and best practices →

Error Codes

The Keyword Extractor API uses standard HTTP status codes — 200 on success, 400 for invalid parameters, 401 for missing or invalid keys, 403 for insufficient credits, 429 for rate-limit exhaustion, and 500/503 for server-side issues. Each error response includes an X-Request-ID header you can quote when contacting support. See full error handling guide →

SDKs for Keyword Extractor

Official Keyword Extractor packages on npm, PyPI, NuGet, and JitPack — plus a Postman collection and an OpenAPI spec. See the SDK guide →

JitPack

No-Code Integrations

Keyword Extractor works with Zapier, Make, Pipedream, n8n, and Power Automate using the same API key. See setup guides →

Zapier

Make

Pipedream

n8n

Power Automate

Frequently Asked Questions

People who used this also used...

Based on your interest in Keyword Extractor, you might also like these APIs:

Rhyming Words

Word Rhymes is a simple tool for getting word rhymes. It returns a list of rhyming words.

1 credit per call

Word Pronunciation

Word Pronunciation is a simple tool for getting the pronunciation of a word. It returns the pronunciation of the word provided.

1 credit per call

Word Opposites

Word Opposites is a simple tool for getting the opposites of a word. It returns a list of opposites for the given word.

10 credits per call