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Cloudflare Custom Error Page Crawler

GoodBotVerifiedBOT

Cloulflare internal service that crawls customer error pages in order to serve them directly from our edge network. Operated by Cloudflare.

GoodBot
Assessment
SEO
Category
BOT
Kind
1
Data sources
AI-generated summary, drawn from Cloudflare, operator docs, and community data

What is Cloudflare Custom Error Page Crawler?

Cloudflare Custom Error Page Crawler is a web crawler operated by Cloudflare. Cloulflare internal service that crawls customer error pages in order to serve them directly from our edge network.

Helpful — Verified, safe crawler. Respects robots.txt and provides operator documentation.

Identification

Bot name
Cloudflare Custom Error Page Crawler
Operator
Cloudflare
Category
SEO
Kind
BOT
Verification
Verified bot
Cloudflare slug
cloudflare-collapsify
User-agent patterns
Collapsify/
User-agent string
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10; rv:60.0) Gecko/20100101 Firefox/60.0 Collapsify/0.6.0 node/v10.16.0
Main use cases
SEO analysisBacklink discoverySearch ranking monitoring

Why it crawls your site

Cloudflare Custom Error Page Crawler crawls websites to analyze search engine optimization factors and backlinks. It is operated by Cloudflare as part of their SEO analysis infrastructure. If you see this bot in your server logs, it is a verified crawler and generally safe.

Block or allow Cloudflare Custom Error Page Crawler

Block it

Add a Disallow rule for Collapsify/ in your robots.txt file. You can also block at the server level using your web server configuration or CDN firewall rules to filter requests matching the user-agent string.

# Block Cloudflare Custom Error Page Crawler from crawling your entire site
User-agent: Collapsify/
Disallow: /

# Allow Cloudflare Custom Error Page Crawler full access
User-agent: Collapsify/
Allow: /
Allow & verify

Ensure your robots.txt allows Collapsify/. Verify requests are genuine by checking the user-agent string and referring to Cloudflare's documentation.

Traffic & trends

Cloudflare Radar traffic

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Data sources

This profile is compiled from the following sources.

CloudflareRadar
Last updated July 26, 2026