Bluesky Cardyb
Bluesky PBLLC •
Since 2023
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What is Bluesky Cardyb?
Bluesky Cardyb fetches web page metadata to generate link card previews when URLs are shared on the Bluesky social network, which is built on the AT Protocol. The bot retrieves Open Graph tags, page titles, descriptions, and thumbnail images to create rich link cards in Bluesky posts. As Bluesky grows as a decentralized social media alternative, this bot is increasingly common in server logs. It respects robots.txt directives.
User Agent String
Bluesky Cardyb/1.0
How to Control Bluesky Cardyb
Block Completely
To prevent Bluesky Cardyb from accessing your entire website, add this to your robots.txt file:
# Block Bluesky Cardyb
User-agent: Bluesky
Disallow: /
Block Specific Directories
To restrict access to certain parts of your site while allowing others:
User-agent: Bluesky
Disallow: /admin/
Disallow: /private/
Disallow: /wp-admin/
Allow: /public/
Set Crawl Delay
To slow down the crawl rate (note: not all bots respect this directive):
User-agent: Bluesky
Crawl-delay: 10
How to Verify Bluesky Cardyb
Verification Method:
Check user agent string for Bluesky identifier
Check user agent string for Bluesky identifier
Learn more in the official documentation.
Detection Patterns
Multiple ways to detect Bluesky Cardyb in your application:
Basic Pattern
/Bluesky Cardyb/iStrict Pattern
/^Bluesky Cardyb/1\.0$/Flexible Pattern
/Bluesky Cardyb[\s\/]?[\d\.]*?/iVendor Match
/.*Bluesky PBLLC.*Bluesky/iImplementation Examples
// PHP Detection for Bluesky Cardyb
function detect_bluesky_cardyb() {
$user_agent = $_SERVER['HTTP_USER_AGENT'] ?? '';
$pattern = '/Bluesky Cardyb/i';
if (preg_match($pattern, $user_agent)) {
// Log the detection
error_log('Bluesky Cardyb detected from IP: ' . $_SERVER['REMOTE_ADDR']);
// Set cache headers
header('Cache-Control: public, max-age=3600');
header('X-Robots-Tag: noarchive');
// Optional: Serve cached version
if (file_exists('cache/' . md5($_SERVER['REQUEST_URI']) . '.html')) {
readfile('cache/' . md5($_SERVER['REQUEST_URI']) . '.html');
exit;
}
return true;
}
return false;
}
# Python/Flask Detection for Bluesky Cardyb
import re
from flask import request, make_responsedef detect_bluesky_cardyb():
user_agent = request.headers.get('User-Agent', '')
pattern = r'Bluesky Cardyb'
if re.search(pattern, user_agent, re.IGNORECASE):
# Create response with caching
response = make_response()
response.headers['Cache-Control'] = 'public, max-age=3600'
response.headers['X-Robots-Tag'] = 'noarchive'
return True
return False# Django Middleware
class BlueskyCardybMiddleware:
def __init__(self, get_response):
self.get_response = get_response
def __call__(self, request):
if self.detect_bot(request):
# Handle bot traffic
pass
return self.get_response(request)
// JavaScript/Node.js Detection for Bluesky Cardyb
const express = require('express');
const app = express();// Middleware to detect Bluesky Cardyb
function detectBlueskyCardyb(req, res, next) {
const userAgent = req.headers['user-agent'] || '';
const pattern = /Bluesky Cardyb/i;
if (pattern.test(userAgent)) {
// Log bot detection
console.log('Bluesky Cardyb detected from IP:', req.ip);
// Set cache headers
res.set({
'Cache-Control': 'public, max-age=3600',
'X-Robots-Tag': 'noarchive'
});
// Mark request as bot
req.isBot = true;
req.botName = 'Bluesky Cardyb';
}
next();
}app.use(detectBlueskyCardyb);
# Apache .htaccess rules for Bluesky Cardyb# Block completely
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Bluesky Cardyb [NC]
RewriteRule .* - [F,L]# Or redirect to a static version
RewriteCond %{HTTP_USER_AGENT} Bluesky Cardyb [NC]
RewriteCond %{REQUEST_URI} !^/static/
RewriteRule ^(.*)$ /static/$1 [L]# Or set environment variable for PHP
SetEnvIfNoCase User-Agent "Bluesky Cardyb" is_bot=1# Add cache headers for this bot
<If "%{HTTP_USER_AGENT} =~ /Bluesky Cardyb/i">
Header set Cache-Control "public, max-age=3600"
Header set X-Robots-Tag "noarchive"
</If>
# Nginx configuration for Bluesky Cardyb# Map user agent to variable
map $http_user_agent $is_bluesky_cardyb {
default 0;
~*Bluesky Cardyb 1;
}server {
# Block the bot completely
if ($is_bluesky_cardyb) {
return 403;
}
# Or serve cached content
location / {
if ($is_bluesky_cardyb) {
root /var/www/cached;
try_files $uri $uri.html $uri/index.html @backend;
}
try_files $uri @backend;
}
# Add headers for bot requests
location @backend {
if ($is_bluesky_cardyb) {
add_header Cache-Control "public, max-age=3600";
add_header X-Robots-Tag "noarchive";
}
proxy_pass http://backend;
}
}
Should You Block This Bot?
Recommendations based on your website type:
| Site Type | Recommendation | Reasoning |
|---|---|---|
| E-commerce | Optional | Evaluate based on bandwidth usage vs. benefits |
| Blog/News | Allow | Increases content reach and discoverability |
| SaaS Application | Block | No benefit for application interfaces; preserve resources |
| Documentation | Selective | Allow for public docs, block for internal docs |
| Corporate Site | Limit | Allow for public pages, block sensitive areas like intranets |
Advanced robots.txt Configurations
E-commerce Site Configuration
User-agent: Bluesky
Crawl-delay: 5
Disallow: /cart/
Disallow: /checkout/
Disallow: /my-account/
Disallow: /api/
Disallow: /*?sort=
Disallow: /*?filter=
Disallow: /*&page=
Allow: /products/
Allow: /categories/
Sitemap: https://example.com/sitemap.xml
Publishing/Blog Configuration
User-agent: Bluesky
Crawl-delay: 10
Disallow: /wp-admin/
Disallow: /drafts/
Disallow: /preview/
Disallow: /*?replytocom=
Allow: /
SaaS/Application Configuration
User-agent: Bluesky
Disallow: /app/
Disallow: /api/
Disallow: /dashboard/
Disallow: /settings/
Allow: /
Allow: /pricing/
Allow: /features/
Allow: /docs/
Quick Reference
User Agent Match
Bluesky CardybRobots.txt Name
BlueskyCategory
socialRespects robots.txt
Yes
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