Overview
ProjectShield Url Check is a monitoring bot from Google used for security scanning, malware checks, vulnerability assessment, certificate review, and site-safety analysis.
Its primary user-agent pattern is ProjectShield-UrlCheck; a representative HTTP user-agent is Mozilla/5.0 (compatible; ProjectShield-UrlCheck; +http://g.co/projectshield).
ProjectShield Url Check is Unverified at the identity-evidence level. The listed identity remains useful for detection, but this record does not currently contain authoritative evidence sufficient to authenticate the identity claim.
ProjectShield Url Check is marked as respecting robots.txt directives for crawler access control.
ProjectShield Url Check can usually be allowed after confirming the source and monitoring request volume.
Identity
- User-Agent Pattern
-
ProjectShield-UrlCheck - HTTP Agent Examples
-
Mozilla/5.0 (compatible; ProjectShield-UrlCheck; +http://g.co/projectshield) - Robots Token
- ProjectShield-UrlCheck
- Identity Type
- Observed
- Evidence Method
- Treat `ProjectShield-UrlCheck` as an identity signal only. Confirm it with current operator documentation, cryptographic verification, forward-confirmed reverse DNS, source-network ownership, or other authoritative evidence before trusting the claimed identity.
Classification
- Type
- Security
- Kind
- Monitor
- Family
- Purpose
- Security
Behavior and handling
- Common Use
- ProjectShield Url Check is used for security scanning, malware checks, vulnerability assessment, certificate review, and site-safety analysis.
- Detection Notes
- ProjectShield Url Check traffic is primarily detected by the `ProjectShield-UrlCheck` user-agent pattern; a representative HTTP user-agent is `Mozilla/5.0 (compatible; ProjectShield-UrlCheck; +http://g.co/projectshield)`. Compare source IPs, reverse DNS, request paths, and crawl cadence with Google infrastructure before trusting the traffic.
- Respects robots.txt
- Yes
- Spoofing Risk
- ProjectShield Url Check has medium spoofing risk because the user-agent can be copied, even when the bot has strong source or documentation support.
- Risk
- Safe
- Recommended Handling
- Do not block
Rules and controls
- Robots.txt Snippet
-
User-agent: ProjectShield-UrlCheck Disallow: /
Relationships
- Operator
- Google Checked 2026-08-07
Relationships without an Evidence link are normalized from the canonical directory record. They should not be interpreted as independent proof of physical presence or request origin.