Ads.txt crawler operated by ContextWeb, a contextual advertising exchange now part of PulsePoint. It reads publisher authorised seller files to validate programmatic inventory.

At a glance

Operator: ContextWeb
Type: Advertising

How Centinel checks it

User agent: The request calls itself this crawler. Anyone can send the same string.

ContextWebCom-AdsTxt 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, Advertising.

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