4chan API

Overview

Measurement Record

What actually happened when we called this API from our own infrastructure. Every value below was recorded by the request, not copied from the provider's documentation.

Request

GET https://a.4cdn.org/g/catalog.json

Result

HTTP 200 · application/json · 420,735 bytes · compressed

Response time

52 ms (median of 3) · fastest 48 ms

Transport

TLSv1.3 · TLS_AES_256_GCM_SHA384 · certificate issued by Google Trust Services

Browser CORS

Allowed — Access-Control-Allow-Origin: http://boards.4chan.org

Served by

cloudflare

Answered

6 of 8 weekly checks (75%, since 2026-07-31)

Recorded

2026-09-21

Fields Returned

Top-level fields present in the response we captured, with the type and value we actually received.

Captured Response

Captured from a real request to https://a.4cdn.org/g/catalog.json on 2026-08-31. Long arrays and nested objects are truncated to keep the shape readable.

[
  {
    "page": 1,
    "threads": [
      {
        "…": "(25 more fields)"
      }
    ]
  }
]

Implementation Example

Calls a real endpoint of this API. Replace any placeholder credentials with your own key.

const url = "https://a.4cdn.org/g/catalog.json";
const response = await fetch(url);
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data);

import requests

url = "https://a.4cdn.org/g/catalog.json"
headers = {}

response = requests.get(url, headers=headers, timeout=30)
response.raise_for_status()
data = response.json()
print(data)

curl -X GET "https://a.4cdn.org/g/catalog.json"

What Can You Build?

// Get social media user data
const response = await fetch(`https://github.com/4chan/4chan-API`);
const data = await response.json();
const user = data.user || data.data || data;
console.log('Username:', user.username || user.name || user.login);
console.log('Followers:', user.followers || user.followers_count || 'N/A');

// Fetch trending social content
const response = await fetch(`https://github.com/4chan/4chan-API`);
const data = await response.json();
const posts = data.posts || data.data || data.results || [];
const items = Array.isArray(posts) ? posts : [posts];
items.slice(0, 5).forEach(post => {
  console.log(`📱 ${post.title || post.text || post.content || JSON.stringify(post)}`);
});

// Aggregate social media content
const response = await fetch(`https://github.com/4chan/4chan-API`);
const data = await response.json();
const feed = data.feed || data.posts || data.data || [];
const container = document.getElementById('social-feed');
const items = Array.isArray(feed) ? feed : [feed];
items.slice(0, 10).forEach(item => {
  const el = document.createElement('div');
  el.textContent = item.text || item.content || JSON.stringify(item);
  container.appendChild(el);
});

Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.

Common Errors & Troubleshooting

Generated guidance based on this API's documentation, not observed by us. Treat it as a starting point and check against the provider's own error reference.