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What is Google Trust Services (DCV Check)?

Direct Answer: Google Trust Services bot for DCV Check, operated by Google, for certificate validation.

Operator: Google Type: Security Scanner Purpose: Domain Control Validation for TLS certificate issuance

The Google Trust Services bot is used for Domain Control Validation (DCV) checks as part of Google's certificate authority services. It helps in verifying domain ownership for issuing TLS certificates. This bot is part of Google's efforts to provide a transparent, trusted, and reliable Certificate Authority, contributing to a safer Internet.

User-Agent Identification

The following user-agent strings identify Google Trust Services (DCV Check) in your live traffic data:

  • Mozilla/5.0 (compatible; Google-Trust-Services/2.0; http://pki.goog/)

robots.txt Rules for Google Trust Services (DCV Check)

Respects robots.txt: No

This bot does not commit to following robots.txt

Google Trust Services (DCV Check) 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 Behavior

Frequency:Not Documented

Request Pattern:Not Documented

Crawl Activity Index

Relative crawl activity for Google Trust Services (DCV Check) 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 Google Trust Services (DCV Check) traffic?

Identify and classify unknown crawler activity. Google Trust Services (DCV Check) 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 Google Trust Services (DCV Check) crawls helps you prioritize the crawlers that matter.

Log Verification

To verify Google Trust Services (DCV Check) traffic in your live traffic data:

  1. Search access logs for the user-agent strings listed above
  2. Check if the IP addresses match documented ranges (if provided by Google)
  3. Verify the crawl pattern matches documented behavior
  4. 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.

Undocumented Information

The following information is not officially documented for Google Trust Services (DCV Check):

  • crawl frequency
  • request pattern
  • IP verification method
  • JavaScript rendering

Official Documentation

View Official Google Trust Services (DCV Check) Documentation →

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