AdIdxBot

Verifiable

Microsoft's crawler for Bing Ads / Microsoft Advertising. It crawls ads and follows through to the advertised landing pages for quality control, with both desktop and mobile variants.

Operated by Microsoft · Official documentation

User agents

Patterns this directory matches, with real observed strings.

regexadidxbot/\d
observedMozilla/5.0 (compatible; adidxbot/2.0; +http://www.bing.com/bingbot.htm)
observedMozilla/5.0 (iPhone; CPU iPhone OS 7_0 like Mac OS X) AppleWebKit/537.51.1 (KHTML, like Gecko) Version/7.0 Mobile/11A465 Safari/9537.53 (compatible; adidxbot/2.0; +http://www.bing.com/bingbot.htm)

How to verify

Reverse-DNS check a client IP

dig -x <client-ip> +short   # expect a hostname matching *.search.msn.com

Reverse-DNS suffixes: *.search.msn.com

Good Bot Practices scorecard

Identifies honestly
Stable UA token documented (1 pattern)
Verifiable
Verifiable
Respects robots.txt
Honors robots.txt
Behaves
Crawl-rate behavior is operator-declared; not machine-verifiable from this dataset
Reachable operator
Operator and documentation published

Measured against the Good Bot Practices.