Vowel Counter API
Vowel Counter analyzes text to count vowels and consonants, providing detailed breakdowns and percentages for linguistic analysis.
The Vowel Counter API provides reliable and fast access to vowel counter data through a simple REST interface. Built for developers who need consistent, high-quality results with minimal setup time.
To use Vowel Counter, 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/vowelcounterCode Examples
Here are examples of how to call the Vowel Counter API in different programming languages:
curl -X POST \
"https://api.apiverve.com/v1/vowelcounter" \
-H "X-API-Key: your_api_key_here" \
-H "Content-Type: application/json" \
-d '{
"text": "The quick brown fox jumps over the lazy dog. This pangram contains every letter of the alphabet at least once."
}'const response = await fetch('https://api.apiverve.com/v1/vowelcounter', {
method: 'POST',
headers: {
'X-API-Key': 'your_api_key_here',
'Content-Type': 'application/json'
},
body: JSON.stringify({
"text": "The quick brown fox jumps over the lazy dog. This pangram contains every letter of the alphabet at least once."
})
});
const data = await response.json();
console.log(data);import requests
headers = {
'X-API-Key': 'your_api_key_here',
'Content-Type': 'application/json'
}
payload = {
"text": "The quick brown fox jumps over the lazy dog. This pangram contains every letter of the alphabet at least once."
}
response = requests.post('https://api.apiverve.com/v1/vowelcounter', headers=headers, json=payload)
data = response.json()
print(data)const https = require('https');
const url = require('url');
const options = {
method: 'POST',
headers: {
'X-API-Key': 'your_api_key_here',
'Content-Type': 'application/json'
}
};
const postData = JSON.stringify({
"text": "The quick brown fox jumps over the lazy dog. This pangram contains every letter of the alphabet at least once."
});
const req = https.request('https://api.apiverve.com/v1/vowelcounter', options, (res) => {
let data = '';
res.on('data', (chunk) => data += chunk);
res.on('end', () => console.log(JSON.parse(data)));
});
req.write(postData);
req.end();<?php
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'https://api.apiverve.com/v1/vowelcounter');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
curl_setopt($ch, CURLOPT_HTTPHEADER, [
'X-API-Key: your_api_key_here',
'Content-Type: application/json'
]);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode({
'text': 'The quick brown fox jumps over the lazy dog. This pangram contains every letter of the alphabet at least once.'
}));
$response = curl_exec($ch);
curl_close($ch);
$data = json_decode($response, true);
print_r($data);
?>package main
import (
"fmt"
"io"
"net/http"
"bytes"
"encoding/json"
)
func main() {
payload := map[string]interface{}{
"text": "The quick brown fox jumps over the lazy dog. This pangram contains every letter of the alphabet at least once."
}
jsonPayload, _ := json.Marshal(payload)
req, _ := http.NewRequest("POST", "https://api.apiverve.com/v1/vowelcounter", 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))
}require 'net/http'
require 'json'
uri = URI('https://api.apiverve.com/v1/vowelcounter')
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true
payload = {
"text": "The quick brown fox jumps over the lazy dog. This pangram contains every letter of the alphabet at least once."
}
request = Net::HTTP::Post.new(uri)
request['X-API-Key'] = 'your_api_key_here'
request['Content-Type'] = 'application/json'
request.body = payload.to_json
response = http.request(request)
puts JSON.pretty_generate(JSON.parse(response.body))using System;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
class Program
{
static async Task Main(string[] args)
{
using var client = new HttpClient();
client.DefaultRequestHeaders.Add("X-API-Key", "your_api_key_here");
var jsonContent = @"{
""text"": ""The quick brown fox jumps over the lazy dog. This pangram contains every letter of the alphabet at least once.""
}";
var content = new StringContent(jsonContent, Encoding.UTF8, "application/json");
var response = await client.PostAsync("https://api.apiverve.com/v1/vowelcounter", content);
response.EnsureSuccessStatusCode();
var responseBody = await response.Content.ReadAsStringAsync();
Console.WriteLine(responseBody);
}
}Authentication
The Vowel Counter API requires authentication via API key. Include your API key in the request header:
X-API-Key: your_api_key_hereInteractive API Playground
Test the Vowel Counter API directly in your browser with live requests and responses.
Parameters
The following parameters are available for the Vowel Counter API:
Count Vowels and Consonants
| Parameter | Type | Required | Description | Default | Example |
|---|---|---|---|---|---|
text | string | required | Text to analyze (max 50,000 characters) | - |
Response
The Vowel Counter API returns responses in JSON, XML, YAML, and CSV formats:
Example Responses
{
"status": "ok",
"error": null,
"data": {
"vowels": 31,
"consonants": 58,
"totalLetters": 89,
"vowelPercentage": 34.83,
"consonantPercentage": 65.17,
"vowelBreakdown": {
"a": 8,
"e": 11,
"i": 3,
"o": 7,
"u": 2
},
"textLength": 110
}
}<?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>
<vowels>31</vowels>
<consonants>58</consonants>
<totalLetters>89</totalLetters>
<vowelPercentage>34.83</vowelPercentage>
<consonantPercentage>65.17</consonantPercentage>
<vowelBreakdown>
<a>8</a>
<e>11</e>
<i>3</i>
<o>7</o>
<u>2</u>
</vowelBreakdown>
<textLength>110</textLength>
</data>
</response>
status: ok
error: null
data:
vowels: 31
consonants: 58
totalLetters: 89
vowelPercentage: 34.83
consonantPercentage: 65.17
vowelBreakdown:
a: 8
e: 11
i: 3
o: 7
u: 2
textLength: 110
| key | value |
|---|---|
| vowels | 31 |
| consonants | 58 |
| totalLetters | 89 |
| vowelPercentage | 34.83 |
| consonantPercentage | 65.17 |
| vowelBreakdown | {a:8,e:11,i:3,o:7,u:2} |
| textLength | 110 |
Response Structure
All API responses follow a consistent structure with the following fields:
| Field | Type | Description | Example |
|---|---|---|---|
status | string | Indicates whether the request was successful ("ok") or failed ("error") | ok |
error | string | null | Contains error message if status is "error", otherwise null | null |
data | object | null | Contains the API response data if successful, otherwise null | {...} |
Learn more about response formats →
Response Data Fields
When the request is successful, the data object contains the following fields:
| Field | Type | Sample Value | Description |
|---|---|---|---|
vowels | number | Total count of vowels (a, e, i, o, u) in text | |
consonants | number | Total count of consonant letters in text | |
totalLetters | number | Combined count of vowels and consonants | |
vowelPercentagePremium | number | Percentage of text consisting of vowel letters | |
consonantPercentagePremium | number | Percentage of text consisting of consonant letters | |
vowelBreakdown | object | - | |
â”” aPremium | number | Individual count of letter 'a' in text | |
â”” ePremium | number | Individual count of letter 'e' in text | |
â”” iPremium | number | Individual count of letter 'i' in text | |
â”” oPremium | number | Individual count of letter 'o' in text | |
â”” uPremium | number | Individual count of letter 'u' in text | |
textLengthPremium | number | Total character length including spaces and punctuation |
Headers
Required and optional headers for Vowel Counter API requests:
| Header Name | Required | Example Value | Description |
|---|---|---|---|
X-API-Key | required | your_api_key_here | Your APIVerve API key. Found in your dashboard under API Keys. |
Accept | optional | application/json | Specify response format: application/json (default), application/xml, or application/yaml |
User-Agent | optional | MyApp/1.0 | Identifies your application for analytics and debugging purposes |
X-Request-ID | optional | req_123456789 | Custom request identifier for tracking and debugging requests |
Cache-Control | optional | no-cache | Control caching behavior for the request and response |
GraphQL AccessALPHA
Access Vowel Counter through GraphQL to combine it with other API calls in a single request. Query only the vowel counter 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/graphqlquery {
vowelcounter(
input: {
text: "The quick brown fox jumps over the lazy dog. This pangram contains every letter of the alphabet at least once."
}
) {
vowels
consonants
totalLetters
vowelPercentage
consonantPercentage
vowelBreakdown {
a
e
i
o
u
}
textLength
}
}Note: Authentication is handled via the x-api-key header in your GraphQL request, not as a query parameter.
CORS Support
The Vowel Counter API supports Cross-Origin Resource Sharing (CORS) with wildcard configuration, allowing you to call Vowel Counter directly from browser-based applications without proxy servers.
| CORS Header | Value | Description |
|---|---|---|
Access-Control-Allow-Origin | * | Accepts requests from any origin |
Access-Control-Allow-Methods | * | Accepts any HTTP method |
Access-Control-Allow-Headers | * | Accepts any request headers |
Browser Usage: You can call Vowel Counter directly from JavaScript running in the browser without encountering CORS errors. No proxy server or additional configuration needed.
Rate Limiting
Vowel Counter API requests are subject to rate limiting based on your subscription plan. These limits ensure fair usage and maintain service quality for all Vowel Counter users.
| Plan | Rate Limit | Description |
|---|---|---|
| Free | 5 requests/min | Hard rate limit enforced - exceeding will return 429 errors |
| Starter | No Limit | Production ready - standard traffic priority |
| Pro | No Limit | Production ready - preferred traffic priority |
| Mega | No Limit | Production ready - highest traffic priority |
Learn more about rate limiting →
Rate Limit Headers
When rate limits apply, each Vowel Counter response includes headers to help you track your usage:
| Header | Description |
|---|---|
X-RateLimit-Limit | Maximum number of requests allowed per time window |
X-RateLimit-Remaining | Number of requests remaining in the current window |
X-RateLimit-Reset | Unix timestamp when the rate limit window resets |
Handling Rate Limits
Free Plan: When you exceed your rate limit, Vowel Counter returns a 429 Too Many Requests status code. Your application should implement appropriate backoff logic to handle this gracefully.
Paid Plans: No rate limiting or throttling applied. All paid plans (Starter, Pro, Mega) are production-ready.
Best Practices for Vowel Counter:
- Monitor the rate limit headers to track your Vowel Counter usage (Free plan only)
- Cache vowel counter responses where appropriate to reduce API calls
- Upgrade to Pro or Mega for guaranteed no-throttle Vowel Counter performance
Note: Vowel Counter rate limits are separate from credit consumption. You may have credits remaining but still hit rate limits when using Vowel Counter on Free tier.
Error Codes
The Vowel Counter API uses standard HTTP status codes to indicate success or failure:
| Code | Message | Description | Solution |
|---|---|---|---|
200 | OK | Request successful, data returned | No action needed - request was successful |
400 | Bad Request | Invalid request parameters or malformed request | Check required parameters and ensure values match expected formats |
401 | Unauthorized | Missing or invalid API key | Include x-api-key header with valid API key from dashboard |
403 | Forbidden | API key lacks permission or insufficient credits | Check credit balance in dashboard or upgrade plan |
429 | Too Many Requests | Rate limit exceeded (Free: 5 req/min) | Implement request throttling or upgrade to paid plan |
500 | Internal Server Error | Server error occurred | Retry request after a few seconds, contact support if persists |
503 | Service Unavailable | API temporarily unavailable | Wait and retry, check status page for maintenance updates |
Learn more about error handling →
Need help? Contact support with your X-Request-ID for assistance.
Integrate Vowel Counter with SDKs
Get started quickly with official Vowel Counter SDKs for your preferred language. Each library handles authentication, request formatting, and error handling automatically.
Available for Node.js, Python, C#/.NET, and Android/Java. All SDKs are open source and regularly updated.
Integrate Vowel Counter with No-Code API Tools
Connect the Vowel Counter API to your favorite automation platform without writing code. Build workflows that leverage vowel counter data across thousands of apps.





All platforms use your same API key to access Vowel Counter. Visit our integrations hub for step-by-step setup guides.
Frequently Asked Questions
How do I get an API key for Vowel Counter?
How many credits does Vowel Counter cost?
Each successful Vowel Counter API call consumes credits based on plan tier. Check the pricing section above for the exact credit cost. Failed requests and errors don't consume credits, so you only pay for successful vowel counter lookups.
Can I use Vowel Counter in production?
The free plan is for testing and development only. For production use of Vowel Counter, upgrade to a paid plan (Starter, Pro, or Mega) which includes commercial use rights, no attribution requirements, and guaranteed uptime SLAs. All paid plans are production-ready.
Can I use Vowel Counter from a browser?
What happens if I exceed my Vowel Counter credit limit?
When you reach your monthly credit limit, Vowel Counter API requests will return an error until you upgrade your plan or wait for the next billing cycle. You'll receive notifications at 80% and 95% usage to give you time to upgrade if needed.



