Palindrome Checker API

Overview

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

GET Endpoint

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

Example

How to call the Palindrome Checker API in different programming languages.

curl -X GET \
  "https://api.apiverve.com/v1/palindromechecker?text=A%20man%20a%20plan%20a%20canal%20Panama&ignorecase=true&ignorespaces=true&ignorepunctuation=true" \
  -H "X-API-Key: your_api_key_here"

const response = await fetch('https://api.apiverve.com/v1/palindromechecker?text=A%20man%20a%20plan%20a%20canal%20Panama&ignorecase=true&ignorespaces=true&ignorepunctuation=true', {
  method: 'GET',
  headers: {
    'X-API-Key': 'your_api_key_here',
    'Content-Type': 'application/json'
  }
});

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

import requests

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

response = requests.get('https://api.apiverve.com/v1/palindromechecker?text=A%20man%20a%20plan%20a%20canal%20Panama&ignorecase=true&ignorespaces=true&ignorepunctuation=true', headers=headers)

data = response.json()
print(data)

package main

import (
    "fmt"
    "io"
    "net/http"

)

func main() {
    req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/palindromechecker?text=A%20man%20a%20plan%20a%20canal%20Panama&ignorecase=true&ignorespaces=true&ignorepunctuation=true", nil)

    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": {
    "text": "A man a plan a canal Panama",
    "is_palindrome": true,
    "cleaned_text": "amanaplanacanalpanama",
    "reversed_text": "amanaplanacanalpanama",
    "length": 21,
    "options": {
      "ignore_case": true,
      "ignore_spaces": true,
      "ignore_punctuation": true
    },
    "longest_palindrome_substring": "amanaplanacanalpanama",
    "longest_palindrome_length": 21
  }
}

Authentication

The Palindrome Checker 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 Palindrome Checker API directly in your browser with live requests and responses.

Parameters

The following parameters are available for the Palindrome Checker API:

Response

The Palindrome Checker 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>
    <text>A man a plan a canal Panama</text>
    <is_palindrome>true</is_palindrome>
    <cleaned_text>amanaplanacanalpanama</cleaned_text>
    <reversed_text>amanaplanacanalpanama</reversed_text>
    <length>21</length>
    <options>
      <ignore_case>true</ignore_case>
      <ignore_spaces>true</ignore_spaces>
      <ignore_punctuation>true</ignore_punctuation>
    </options>
    <longest_palindrome_substring>amanaplanacanalpanama</longest_palindrome_substring>
    <longest_palindrome_length>21</longest_palindrome_length>
  </data>
</response>

status: ok
error: null
data:
  text: A man a plan a canal Panama
  is_palindrome: true
  cleaned_text: amanaplanacanalpanama
  reversed_text: amanaplanacanalpanama
  length: 21
  options:
    ignore_case: true
    ignore_spaces: true
    ignore_punctuation: true
  longest_palindrome_substring: amanaplanacanalpanama
  longest_palindrome_length: 21

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 Palindrome Checker through GraphQL to combine it with other API calls in a single request. Query only the palindrome checker 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 {
  palindromechecker(
    input: {
      text: "A man a plan a canal Panama"
      ignorecase: true
      ignorespaces: true
      ignorepunctuation: true
    }
  ) {
    text
    is_palindrome
    cleaned_text
    reversed_text
    length
    options {
      ignore_case
      ignore_spaces
      ignore_punctuation
    }
    longest_palindrome_substring
    longest_palindrome_length
  }
}

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

CORS Support

The Palindrome Checker 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

Palindrome Checker 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 Palindrome Checker 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 Palindrome Checker

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

JitPack

No-Code Integrations

Palindrome Checker 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 Palindrome Checker, 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