Bot intelligence record
HSTS preload bot
Review firstUse the hstspreload-bot identifier to separate Chromium security scanning or verification traffic from normal visitor requests in server logs.
- Operator
- Chromium
- Family
- Chromium
- Type
- Security
- Source type
- Verified Directory
- Last checked
- 2026-05-20
User-Agent Pattern
Chromiumhstspreload-bot
User-agent strings are identification signals, not proof of identity. Confirm important allow, block, or rate-limit decisions with logs, DNS or IP evidence, request behavior, or operator documentation when available.
Robots.txt Snippet
Click snippet to copyUser-agent: hstspreload-bot Disallow: /Click the snippet to copy it, or highlight the text manually.
Handling Guidance
DependsUse this record as bot intelligence, then verify the request source and behavior before allowing, blocking, or rate limiting.
Security scanning, malware checks, abuse prevention, compliance review, or vulnerability monitoring.
Record Details
Structured data- Operator
- Chromium
- Family
- Chromium
- Type
- Security
- Purpose
- Security
- Identity type
- Verified Bot
- Confidence
- Medium
- Last verified
- 2026-04-01
- Last checked
- 2026-05-20
- Source type
- Verified Directory
- Verification
- Validate the identifying user-agent or signature against the operator documentation before creating hard allow rules.
- Spoofing risk
- User-agent strings can be spoofed. For allow-listing or low-friction rules, pair the published identifier with operator documentation or cryptographic verification when available.
Notes
HSTS preload bot is listed in the Botcrawl directory as a security scanner from Chromium. The primary identifier for log review is hstspreload-bot.
Identification
- User-agent pattern:
hstspreload-bot - Family: Chromium
- Type: Security
- Kind: Scanner
Common use
Security scanning, malware checks, abuse prevention, compliance review, or vulnerability monitoring.
Verification and handling
Confirm the user-agent against server logs and use published operator documentation, IP ranges, reverse DNS, or other trust signals when available.
Directory guidance marks the risk level as Neutral and the blocking decision as Depends. Do not rely on the user-agent string alone because user-agent strings can be copied or spoofed.
Robots.txt handling: No.
Evidence and Source
- Validate the identifying user-agent or signature against the operator documentation before creating hard allow rules.
- Match `hstspreload-bot` as a case-insensitive substring in HTTP user-agent logs. Do not treat a user-agent match alone as proof of identity for allow-listing.
- Security scanning, malware checks, abuse prevention, compliance review, or vulnerability monitoring.
- User-agent strings can be spoofed. For allow-listing or low-friction rules, pair the published identifier with operator documentation or cryptographic verification when available.
Monitor This Bot In Edge
Botcrawl EdgeUse Botcrawl Edge to see matching traffic, create allow or block rules, and control this bot across connected sites.