Assaybot

Content analysis crawler for brand safety on the Index Exchange ad exchange. Fetches publisher URLs seen in ad-request traffic and runs them through an AI classifier (adult/hate/violence/CSAM). Single HTTP GET per URL, no JavaScript, no form submission, no link discovery. Does not index for public search and does not redistribute content.

At a glance

Operator: Index Exchange Inc.
Type: Advertising

How Centinel checks it

User agent: The request calls itself this crawler. Anyone can send the same string.
IP ranges: The operator publishes the addresses it crawls from, and Centinel checks the client address against that list.

A request that passes one of these checks is Assaybot itself. One that only matches the user agent is reported as unverified. 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.

Back to the crawler catalog

Crawlers with a source check