HTTPCat — Free Cat Photos for HTTP Status Codes (No Key)

TL;DR

HTTPCat is the original "status code animals" service — each HTTP status code is paired with a cat photo that fits the code's personality. A 200 response shows a content cat, 404 shows a confused cat, 418 shows a cat as a teapot, and 500 shows a distressed cat. It's beloved by developers worldwide for adding personality to error pages.

Quick start: https://http.cat/{status-code} — replace with any HTTP status code

No API key needed — just make a request!

How to Use This API

1. Status Code Cat Images

https://http.cat/200
https://http.cat/201
https://http.cat/301
https://http.cat/404
https://http.cat/418
https://http.cat/429
https://http.cat/500
https://http.cat/503

Simply append any HTTP status code to get an expressive cat image. No file extension needed — the response is a JPEG image.

2. Custom Image Sizes

https://http.cat/404.jpg?width=400&height=300

Optional width and height query parameters for responsive layouts.

3. HTML — Error Page Embed

<!DOCTYPE html>
<html>
<head>
  <title>Page Not Found</title>
  <style>
    .error-container { text-align: center; padding: 2rem; }
    .error-container img { max-width: 500px; border-radius: 12px; }
  </style>
</head>
<body>
  <div class="error-container">
    <h1>404 — Page Not Found</h1>
    <img src="https://http.cat/404" alt="HTTP 404 cat">
    <p>Sorry, we couldn't find that page.</p>
  </div>
</body>
</html>

4. JavaScript — Dynamic Error Cat

function showErrorCat(errorContainerId, statusCode) {
  const container = document.getElementById(errorContainerId);
  if (!container) return;
  
  container.innerHTML = `
    <div style="text-align:center">
      <h2>HTTP ${statusCode}</h2>
      <img src="https://http.cat/${statusCode}"
           alt="HTTP ${statusCode} cat"
           style="max-width:400px;border-radius:8px">
    </div>
  `;
}

// Use on 404
showErrorCat('main', 404);
// Or catch all errors
fetch('/api/data')
  .then(r => r.ok ? r : Promise.reject(r.status))
  .catch(status => showErrorCat('main', status));

5. Python — Cat for Every Error

import requests

def httpcat_url(status_code):
    return f'https://http.cat/{status_code}'

def download_cat_for_error(status_code, filename=None):
    if not filename:
        filename = f'http-{status_code}.jpg'
    resp = requests.get(httpcat_url(status_code), stream=True)
    with open(filename, 'wb') as f:
        for chunk in resp.iter_content(chunk_size=8192):
            f.write(chunk)
    print(f'Saved cat for HTTP {status_code} as {filename}')

download_cat_for_error(418, 'teapot-cat.jpg')

Try a 418 cat (I'm a Teapot): https://http.cat/418

Try This URL Now

Frequently Asked Questions

What status codes have cat images?: Most standard HTTP codes: 100, 101, 200, 201, 202, 204, 206, 207, 300, 301, 302, 303, 304, 305, 307, 400, 401, 402, 403, 404, 405, 406, 407, 408, 409, 410, 411, 412, 413, 414, 415, 416, 417, 418, 420, 421, 422, 423, 424, 425, 426, 429, 431, 444, 450, 451, 500, 502, 503, 504, 506, 507, 508, 509, 511, 599.
Can I use this commercially?: Yes, HTTPCat images are freely available for any use. The service is a developer community resource.
Is there a JSON version?: No direct JSON endpoint — but the URL pattern is simple: just use https://http.cat/{code} and you get the JPEG directly.
What if I request a code without a cat?: You'll get a generic cat image rather than an error. Most common codes from 100-599 are covered.
Are there usage limits?: No documented limits, but as a free service, use it responsibly. For production apps at scale, consider caching images.

API Details

API URL: https://http.cat
Documentation: http.cat
Category: Development
Authentication: Not Required
Geographic Coverage: Global

What You Can Build

Custom 404 pages that make users smile instead of leaving
API health check dashboard with cat status indicators
HTTP status code learning tool for coding bootcamps
Developer portfolio showcasing error pages with personality
Fun error boundary UI for React or Vue apps