Centinel AnalyticaW3 Validator Services
W3C Validator validates HTML, CSS, and web accessibility standards for the World Wide Web Consortium's validation services.
At a glance
- Operator: World Wide Web Consortium (W3C)
- Type: Other
How Centinel checks it
- User agent: The request calls itself this crawler. Anyone can send the same string.
W3 Validator Services publishes nothing Centinel can check a source against, so a match reports the name and leaves the source unconfirmed. The match tokens, verification domains, and address feeds are not published here.
Allowing or blocking it
The crawler object in the /validate response sets access_allowed to true only for a verified source that your tenant allowlists. A policy rule can allow or block this crawler by its category, Other.