Which user-agent strings identify Cloudflare CSUP?

The following user-agent strings identify Cloudflare CSUP: cloudflare-csup.

Does Cloudflare CSUP respect robots.txt rules?

According to official documentation, Cloudflare CSUP does not respect robots.txt rules.

How can I verify Cloudflare CSUP traffic with live traffic data?

You can verify Cloudflare CSUP requests by checking your server access logs for the documented user-agent strings. For accurate verification, correlate user-agent patterns with IP ranges or verification methods provided by Cloudflare.

What is Cloudflare CSUP?

Direct Answer: Cloudflare CSUP is a bot used by Cloudflare's customer support for diagnostic purposes. It is not a general web crawler and is used to investigate technical issues with customer websites.

Operator: Cloudflare Type: Other Bot Purpose: Web crawling

User-Agent Identification

The following user-agent strings identify Cloudflare CSUP in your live traffic data:

cloudflare-csup

robots.txt Rules for Cloudflare CSUP

Respects robots.txt: No

This bot does not commit to following robots.txt

Cloudflare CSUP does not officially follow robots.txt directives. The only reliable way to control access is through server-side blocking (IP filtering, user-agent rules in your web server config) combined with log monitoring to verify effectiveness.

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Crawl Activity Index

Relative crawl activity for Cloudflare CSUP over the past 28 days. Higher values indicate increased crawling intensity compared to the period baseline.

View recent activity data (last 7 days)

Date	Activity Index
Mar 26, 2026	88.0
Mar 27, 2026	82.7
Mar 28, 2026	83.1
Mar 29, 2026	81.8
Mar 30, 2026	87.3
Mar 31, 2026	90.2
Apr 1, 2026	88.9

Source: Cloudflare Radar

Why track Cloudflare CSUP traffic?

Identify and classify unknown crawler activity. Cloudflare CSUP may appear in your live traffic data with varying frequency. Tracking its behavior helps you decide whether to allow, throttle, or block it based on actual data.

Protect your crawl budget. Every bot request consumes server resources. Understanding what Cloudflare CSUP crawls helps you prioritize the crawlers that matter.

Log Verification

To verify Cloudflare CSUP traffic in your live traffic data:

Search access logs for the user-agent strings listed above
Check if the IP addresses match documented ranges (if provided by Cloudflare)
Verify the crawl pattern matches documented behavior
Use reverse DNS lookup for additional verification if available

Note: Observed behavior in production environments may differ from official documentation. Live traffic monitoring provides the only reliable verification of actual bot behavior.

Official Documentation

View Official Cloudflare CSUP Documentation →

Information sourced from official documentation. Content generated with AI assistance.