Bot intelligence record

W3C Feed Validator

Review first

W3C Feed Validator is a validator bot from W3C used for RSS or Atom feed polling, syndication refresh, subscription delivery; it appears in server logs as `FeedValidator`.

Validator Feed Validation Documented Confidence: Medium Verified: Yes robots.txt: Unknown
Operator
W3C
Family
W3C
Type
Validator
Source type
Official
Last checked
2026-06-23

User-Agent Pattern

W3C
FeedValidator
Verification note

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

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User-agent: FeedValidator
Disallow: /

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Handling Guidance

Allow

Use this record as bot intelligence, then verify the request source and behavior before allowing, blocking, or rate limiting.

W3C Feed Validator is used for RSS or Atom feed polling, syndication refresh, subscription delivery, and content update checks.

Record Details

Structured data
Operator
W3C
Family
W3C
Type
Validator
Purpose
Feed Validation
Identity type
Documented
Confidence
Medium
Last verified
2026-06-23
Last checked
2026-06-23
Source type
Official
Verification
Verify W3C Feed Validator by matching `FeedValidator` to W3C evidence, then checking reverse DNS, source-network ownership, signed request data, or published crawler documentation when available.
Spoofing risk
W3C Feed Validator has medium spoofing risk because user-agent strings can be copied; pair the match with DNS, IP, behavior, or operator evidence.

Notes

  • W3C Feed Validator is a validator bot from W3C used for RSS or Atom feed polling, syndication refresh, subscription delivery, and content update checks.
  • Its primary user-agent pattern is FeedValidator; related patterns include W3C Feed Validation Service.
  • W3C Feed Validator is verified with Medium confidence. The identity type is Documented, and the evidence basis is official operator documentation.
  • W3C Feed Validator does not have confirmed robots.txt behavior in the available public evidence.
  • W3C Feed Validator can usually be allowed after confirming the source and monitoring request volume.

Evidence and Source

  • Verify W3C Feed Validator by matching `FeedValidator` to W3C evidence, then checking reverse DNS, source-network ownership, signed request data, or published crawler documentation when available.
  • W3C Feed Validator traffic is primarily detected by the `FeedValidator` user-agent pattern; related patterns include `W3C Feed Validation Service`. Compare source IPs, reverse DNS, request paths, and crawl cadence with W3C infrastructure before trusting the traffic.
  • W3C Feed Validator is used for RSS or Atom feed polling, syndication refresh, subscription delivery, and content update checks.
  • W3C Feed Validator has medium spoofing risk because user-agent strings can be copied; pair the match with DNS, IP, behavior, or operator evidence.

https://www.w3.org/

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