Microsoft
bingbot
Crawls pages for Bing Search.
Web searchAd review
adidxbot
Checks landing pages for Microsoft advertising.
Operated by Microsoft
See your agent traffic PurposeAd review
HTTP identifieradidxbot
IdentityVerify beyond the name
THE SIGNAL
What this visit tells you
Ad checks can appear on campaign URLs that receive little organic crawling.
Landing-page responses
Redirect chains
Failed checks
Your next move
Test the advertised URL and all redirects before broadening crawler access.
The technical details
MarkdownHow to identify it
Look for the adidxbot identifier in a request’s User-Agent. This is a name match, not identity verification. Version strings may change.
How to check identity
Use Microsoft’s documented bot verification procedure and current IP information; do not trust the User-Agent alone.
Access and robots.txt
Microsoft’s robots.txt tester supports AdIdxbot. Test the named-client rules against your advertising landing pages.
Optional full-site opt-out. Merge with existing rules only if intended. robots.txt does not secure private content.
User-agent: adidxbot
Disallow: /Seeing 403 or 404 responses?
403 means access was denied; 404 means the resource was not found. Compare the public path, request time, edge security event and origin response to find the cause.
Separate intended restrictions and secret-file probes from pages that should work. A User-Agent name alone does not justify allowing a request.
SourcesReviewed 2026-09-14
Identity and purpose are based on these sources. Analytics interpretation and suggested checks are Apostl guidance.
APOSTL PulseSee adidxbot in context
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